./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0217.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0217.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:50:58,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:50:58,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:50:58,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:50:58,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:50:58,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:50:58,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:50:58,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:50:58,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:50:58,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:50:58,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:50:58,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:50:58,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:50:58,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:50:58,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:50:58,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:50:58,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:50:58,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:50:58,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:50:58,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:50:58,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:50:58,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:50:58,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:50:58,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:50:58,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:50:58,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:50:58,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:50:58,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:50:58,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:50:58,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:50:58,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:50:58,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:50:58,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:50:58,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:50:58,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:50:58,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:50:58,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:50:58,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:50:58,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:50:58,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:50:58,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:50:58,826 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:50:58,864 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:50:58,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:50:58,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:50:58,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:50:58,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:50:58,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:50:58,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:50:58,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:50:58,868 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:50:58,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:50:58,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:50:58,869 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:50:58,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:50:58,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:50:58,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:50:58,870 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:50:58,870 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:50:58,871 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:50:58,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:50:58,871 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:50:58,871 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:50:58,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:50:58,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:50:58,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:50:58,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:50:58,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:50:58,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:50:58,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:50:58,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:50:58,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:50:58,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:50:58,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec [2021-12-16 05:50:59,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:50:59,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:50:59,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:50:59,140 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:50:59,141 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:50:59,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0217.i [2021-12-16 05:50:59,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/196a5f0bf/5ba63123bfbe447891dc8857be03f970/FLAG0e19ceb56 [2021-12-16 05:50:59,650 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:50:59,651 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0217.i [2021-12-16 05:50:59,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/196a5f0bf/5ba63123bfbe447891dc8857be03f970/FLAG0e19ceb56 [2021-12-16 05:50:59,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/196a5f0bf/5ba63123bfbe447891dc8857be03f970 [2021-12-16 05:50:59,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:50:59,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:50:59,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:50:59,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:50:59,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:50:59,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:50:59" (1/1) ... [2021-12-16 05:50:59,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ed0ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:50:59, skipping insertion in model container [2021-12-16 05:50:59,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:50:59" (1/1) ... [2021-12-16 05:50:59,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:50:59,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:51:00,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:51:00,035 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:51:00,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:51:00,129 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:51:00,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00 WrapperNode [2021-12-16 05:51:00,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:51:00,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:51:00,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:51:00,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:51:00,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00" (1/1) ... [2021-12-16 05:51:00,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00" (1/1) ... [2021-12-16 05:51:00,213 INFO L137 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 218 [2021-12-16 05:51:00,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:51:00,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:51:00,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:51:00,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:51:00,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00" (1/1) ... [2021-12-16 05:51:00,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00" (1/1) ... [2021-12-16 05:51:00,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00" (1/1) ... [2021-12-16 05:51:00,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00" (1/1) ... [2021-12-16 05:51:00,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00" (1/1) ... [2021-12-16 05:51:00,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00" (1/1) ... [2021-12-16 05:51:00,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00" (1/1) ... [2021-12-16 05:51:00,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:51:00,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:51:00,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:51:00,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:51:00,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00" (1/1) ... [2021-12-16 05:51:00,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:51:00,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:51:00,325 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) [2021-12-16 05:51:00,348 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 [2021-12-16 05:51:00,370 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-12-16 05:51:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-12-16 05:51:00,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 05:51:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 05:51:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 05:51:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 05:51:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 05:51:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:51:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 05:51:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 05:51:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:51:00,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:51:00,519 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:51:00,521 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:51:00,939 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:51:00,951 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:51:00,952 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-16 05:51:00,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:51:00 BoogieIcfgContainer [2021-12-16 05:51:00,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:51:00,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:51:00,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:51:00,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:51:00,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:50:59" (1/3) ... [2021-12-16 05:51:00,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2959808c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:51:00, skipping insertion in model container [2021-12-16 05:51:00,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:51:00" (2/3) ... [2021-12-16 05:51:00,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2959808c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:51:00, skipping insertion in model container [2021-12-16 05:51:00,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:51:00" (3/3) ... [2021-12-16 05:51:00,964 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0217.i [2021-12-16 05:51:00,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:51:00,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2021-12-16 05:51:01,004 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:51:01,009 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-16 05:51:01,009 INFO L340 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2021-12-16 05:51:01,024 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 100 states have (on average 1.94) internal successors, (194), 167 states have internal predecessors, (194), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:51:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:51:01,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:01,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:51:01,030 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1074949738, now seen corresponding path program 1 times [2021-12-16 05:51:01,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:01,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989195479] [2021-12-16 05:51:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:01,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:01,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:01,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989195479] [2021-12-16 05:51:01,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989195479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:01,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:01,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:51:01,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013502980] [2021-12-16 05:51:01,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:01,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 05:51:01,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 05:51:01,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 05:51:01,222 INFO L87 Difference]: Start difference. First operand has 171 states, 100 states have (on average 1.94) internal successors, (194), 167 states have internal predecessors, (194), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-16 05:51:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:01,256 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2021-12-16 05:51:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 05:51:01,258 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) Word has length 6 [2021-12-16 05:51:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:01,267 INFO L225 Difference]: With dead ends: 171 [2021-12-16 05:51:01,267 INFO L226 Difference]: Without dead ends: 169 [2021-12-16 05:51:01,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 05:51:01,273 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:01,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:51:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-16 05:51:01,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-16 05:51:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 99 states have (on average 1.878787878787879) internal successors, (186), 165 states have internal predecessors, (186), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:51:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2021-12-16 05:51:01,335 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 6 [2021-12-16 05:51:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:01,336 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2021-12-16 05:51:01,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-16 05:51:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2021-12-16 05:51:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:51:01,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:01,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:01,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:51:01,338 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:01,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1280317330, now seen corresponding path program 1 times [2021-12-16 05:51:01,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:01,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040677973] [2021-12-16 05:51:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:01,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:01,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:01,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040677973] [2021-12-16 05:51:01,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040677973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:01,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:01,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-16 05:51:01,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916817526] [2021-12-16 05:51:01,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:01,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:51:01,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:51:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:51:01,463 INFO L87 Difference]: Start difference. First operand 169 states and 190 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-16 05:51:01,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:01,699 INFO L93 Difference]: Finished difference Result 329 states and 370 transitions. [2021-12-16 05:51:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:51:01,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) Word has length 7 [2021-12-16 05:51:01,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:01,705 INFO L225 Difference]: With dead ends: 329 [2021-12-16 05:51:01,705 INFO L226 Difference]: Without dead ends: 329 [2021-12-16 05:51:01,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:51:01,707 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 171 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:01,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 249 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-16 05:51:01,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 233. [2021-12-16 05:51:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 160 states have (on average 1.8625) internal successors, (298), 226 states have internal predecessors, (298), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:51:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 306 transitions. [2021-12-16 05:51:01,724 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 306 transitions. Word has length 7 [2021-12-16 05:51:01,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:01,724 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 306 transitions. [2021-12-16 05:51:01,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-16 05:51:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 306 transitions. [2021-12-16 05:51:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:51:01,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:01,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:01,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:51:01,726 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:01,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1280317329, now seen corresponding path program 1 times [2021-12-16 05:51:01,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:01,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909389245] [2021-12-16 05:51:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:01,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:01,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:01,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909389245] [2021-12-16 05:51:01,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909389245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:01,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:01,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:51:01,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322702143] [2021-12-16 05:51:01,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:01,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:51:01,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:01,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:51:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:01,816 INFO L87 Difference]: Start difference. First operand 233 states and 306 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-16 05:51:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:02,014 INFO L93 Difference]: Finished difference Result 376 states and 474 transitions. [2021-12-16 05:51:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:51:02,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) Word has length 7 [2021-12-16 05:51:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:02,017 INFO L225 Difference]: With dead ends: 376 [2021-12-16 05:51:02,017 INFO L226 Difference]: Without dead ends: 376 [2021-12-16 05:51:02,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:02,020 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 141 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:02,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 422 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-12-16 05:51:02,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 310. [2021-12-16 05:51:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 231 states have (on average 1.8225108225108224) internal successors, (421), 299 states have internal predecessors, (421), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 05:51:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 437 transitions. [2021-12-16 05:51:02,038 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 437 transitions. Word has length 7 [2021-12-16 05:51:02,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:02,038 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 437 transitions. [2021-12-16 05:51:02,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-16 05:51:02,039 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 437 transitions. [2021-12-16 05:51:02,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:51:02,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:02,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:02,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 05:51:02,040 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:02,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:02,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1280317267, now seen corresponding path program 1 times [2021-12-16 05:51:02,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:02,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447199472] [2021-12-16 05:51:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:02,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:02,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:02,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447199472] [2021-12-16 05:51:02,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447199472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:02,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:02,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:51:02,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779607018] [2021-12-16 05:51:02,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:02,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:51:02,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:02,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:51:02,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:02,115 INFO L87 Difference]: Start difference. First operand 310 states and 437 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-16 05:51:02,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:02,298 INFO L93 Difference]: Finished difference Result 375 states and 472 transitions. [2021-12-16 05:51:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:51:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) Word has length 7 [2021-12-16 05:51:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:02,300 INFO L225 Difference]: With dead ends: 375 [2021-12-16 05:51:02,300 INFO L226 Difference]: Without dead ends: 375 [2021-12-16 05:51:02,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:02,302 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 123 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:02,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 436 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-16 05:51:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 310. [2021-12-16 05:51:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 231 states have (on average 1.8225108225108224) internal successors, (421), 299 states have internal predecessors, (421), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 05:51:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 437 transitions. [2021-12-16 05:51:02,319 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 437 transitions. Word has length 7 [2021-12-16 05:51:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:02,319 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 437 transitions. [2021-12-16 05:51:02,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-16 05:51:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 437 transitions. [2021-12-16 05:51:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 05:51:02,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:02,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:02,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 05:51:02,321 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1671227278, now seen corresponding path program 1 times [2021-12-16 05:51:02,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:02,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119779946] [2021-12-16 05:51:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:02,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:02,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:02,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119779946] [2021-12-16 05:51:02,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119779946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:02,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:02,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:51:02,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436520893] [2021-12-16 05:51:02,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:02,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:02,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:02,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:02,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:02,457 INFO L87 Difference]: Start difference. First operand 310 states and 437 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-16 05:51:02,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:02,693 INFO L93 Difference]: Finished difference Result 461 states and 621 transitions. [2021-12-16 05:51:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:51:02,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) Word has length 10 [2021-12-16 05:51:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:02,696 INFO L225 Difference]: With dead ends: 461 [2021-12-16 05:51:02,696 INFO L226 Difference]: Without dead ends: 461 [2021-12-16 05:51:02,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:51:02,697 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 150 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:02,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 803 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-16 05:51:02,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 352. [2021-12-16 05:51:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 270 states have (on average 1.8074074074074074) internal successors, (488), 339 states have internal predecessors, (488), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 05:51:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 508 transitions. [2021-12-16 05:51:02,708 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 508 transitions. Word has length 10 [2021-12-16 05:51:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:02,709 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 508 transitions. [2021-12-16 05:51:02,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-16 05:51:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 508 transitions. [2021-12-16 05:51:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 05:51:02,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:02,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:02,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 05:51:02,710 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:02,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1673074320, now seen corresponding path program 1 times [2021-12-16 05:51:02,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:02,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855924599] [2021-12-16 05:51:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:02,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:02,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:02,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855924599] [2021-12-16 05:51:02,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855924599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:02,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:02,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:51:02,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180215687] [2021-12-16 05:51:02,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:02,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:02,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:02,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:02,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:02,809 INFO L87 Difference]: Start difference. First operand 352 states and 508 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-16 05:51:02,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:02,972 INFO L93 Difference]: Finished difference Result 451 states and 610 transitions. [2021-12-16 05:51:02,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:51:02,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) Word has length 10 [2021-12-16 05:51:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:02,975 INFO L225 Difference]: With dead ends: 451 [2021-12-16 05:51:02,975 INFO L226 Difference]: Without dead ends: 451 [2021-12-16 05:51:02,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:51:02,976 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 131 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:02,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 762 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-16 05:51:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 351. [2021-12-16 05:51:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 269 states have (on average 1.8104089219330854) internal successors, (487), 338 states have internal predecessors, (487), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 05:51:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 507 transitions. [2021-12-16 05:51:02,986 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 507 transitions. Word has length 10 [2021-12-16 05:51:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:02,986 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 507 transitions. [2021-12-16 05:51:02,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-16 05:51:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 507 transitions. [2021-12-16 05:51:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:51:02,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:02,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:02,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 05:51:02,988 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:02,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash 268436822, now seen corresponding path program 1 times [2021-12-16 05:51:02,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:02,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180530511] [2021-12-16 05:51:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:02,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:03,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:03,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180530511] [2021-12-16 05:51:03,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180530511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:03,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:03,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:51:03,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969918261] [2021-12-16 05:51:03,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:03,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:51:03,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:51:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:51:03,011 INFO L87 Difference]: Start difference. First operand 351 states and 507 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-16 05:51:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:03,103 INFO L93 Difference]: Finished difference Result 406 states and 560 transitions. [2021-12-16 05:51:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:51:03,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2021-12-16 05:51:03,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:03,106 INFO L225 Difference]: With dead ends: 406 [2021-12-16 05:51:03,106 INFO L226 Difference]: Without dead ends: 399 [2021-12-16 05:51:03,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:51:03,107 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 70 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:03,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 287 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-12-16 05:51:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 348. [2021-12-16 05:51:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 266 states have (on average 1.8120300751879699) internal successors, (482), 335 states have internal predecessors, (482), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 05:51:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 502 transitions. [2021-12-16 05:51:03,116 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 502 transitions. Word has length 11 [2021-12-16 05:51:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:03,116 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 502 transitions. [2021-12-16 05:51:03,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-16 05:51:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 502 transitions. [2021-12-16 05:51:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 05:51:03,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:03,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:03,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 05:51:03,118 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:03,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:03,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1044692257, now seen corresponding path program 1 times [2021-12-16 05:51:03,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:03,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107708585] [2021-12-16 05:51:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:03,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:03,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:03,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:03,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107708585] [2021-12-16 05:51:03,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107708585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:03,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:03,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:51:03,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295841355] [2021-12-16 05:51:03,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:03,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:51:03,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:03,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:51:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:03,161 INFO L87 Difference]: Start difference. First operand 348 states and 502 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:03,389 INFO L93 Difference]: Finished difference Result 570 states and 734 transitions. [2021-12-16 05:51:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:51:03,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-16 05:51:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:03,393 INFO L225 Difference]: With dead ends: 570 [2021-12-16 05:51:03,393 INFO L226 Difference]: Without dead ends: 570 [2021-12-16 05:51:03,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:03,394 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 329 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:03,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 434 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:03,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-12-16 05:51:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 354. [2021-12-16 05:51:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 272 states have (on average 1.7941176470588236) internal successors, (488), 341 states have internal predecessors, (488), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 05:51:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 508 transitions. [2021-12-16 05:51:03,411 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 508 transitions. Word has length 15 [2021-12-16 05:51:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:03,411 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 508 transitions. [2021-12-16 05:51:03,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 508 transitions. [2021-12-16 05:51:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 05:51:03,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:03,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:03,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 05:51:03,416 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1044692256, now seen corresponding path program 1 times [2021-12-16 05:51:03,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:03,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608079393] [2021-12-16 05:51:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:03,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:03,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:03,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:03,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608079393] [2021-12-16 05:51:03,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608079393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:03,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:03,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:51:03,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738939761] [2021-12-16 05:51:03,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:03,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:51:03,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:03,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:51:03,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:03,498 INFO L87 Difference]: Start difference. First operand 354 states and 508 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:03,673 INFO L93 Difference]: Finished difference Result 408 states and 530 transitions. [2021-12-16 05:51:03,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:51:03,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-16 05:51:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:03,676 INFO L225 Difference]: With dead ends: 408 [2021-12-16 05:51:03,676 INFO L226 Difference]: Without dead ends: 408 [2021-12-16 05:51:03,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:03,677 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 197 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:03,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 445 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-16 05:51:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 354. [2021-12-16 05:51:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 272 states have (on average 1.7610294117647058) internal successors, (479), 341 states have internal predecessors, (479), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 05:51:03,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 499 transitions. [2021-12-16 05:51:03,685 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 499 transitions. Word has length 15 [2021-12-16 05:51:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:03,686 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 499 transitions. [2021-12-16 05:51:03,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 499 transitions. [2021-12-16 05:51:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:51:03,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:03,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:03,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 05:51:03,687 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:03,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:03,688 INFO L85 PathProgramCache]: Analyzing trace with hash 742849514, now seen corresponding path program 1 times [2021-12-16 05:51:03,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:03,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689079259] [2021-12-16 05:51:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:03,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:03,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:03,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:03,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689079259] [2021-12-16 05:51:03,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689079259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:03,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:03,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:51:03,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157811924] [2021-12-16 05:51:03,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:03,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:51:03,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:03,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:51:03,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:03,749 INFO L87 Difference]: Start difference. First operand 354 states and 499 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:04,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:04,065 INFO L93 Difference]: Finished difference Result 707 states and 854 transitions. [2021-12-16 05:51:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:51:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-16 05:51:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:04,069 INFO L225 Difference]: With dead ends: 707 [2021-12-16 05:51:04,069 INFO L226 Difference]: Without dead ends: 707 [2021-12-16 05:51:04,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:51:04,070 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 867 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:04,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 521 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:51:04,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-12-16 05:51:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 351. [2021-12-16 05:51:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 273 states have (on average 1.7326007326007327) internal successors, (473), 338 states have internal predecessors, (473), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 05:51:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 493 transitions. [2021-12-16 05:51:04,080 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 493 transitions. Word has length 17 [2021-12-16 05:51:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:04,081 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 493 transitions. [2021-12-16 05:51:04,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 493 transitions. [2021-12-16 05:51:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 05:51:04,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:04,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:04,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 05:51:04,082 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:04,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:04,083 INFO L85 PathProgramCache]: Analyzing trace with hash 742849515, now seen corresponding path program 1 times [2021-12-16 05:51:04,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:04,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125150372] [2021-12-16 05:51:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:04,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:04,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:04,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:04,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125150372] [2021-12-16 05:51:04,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125150372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:04,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:04,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:51:04,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121591831] [2021-12-16 05:51:04,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:04,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:04,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:04,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:04,173 INFO L87 Difference]: Start difference. First operand 351 states and 493 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:04,809 INFO L93 Difference]: Finished difference Result 930 states and 1126 transitions. [2021-12-16 05:51:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:51:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-16 05:51:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:04,812 INFO L225 Difference]: With dead ends: 930 [2021-12-16 05:51:04,813 INFO L226 Difference]: Without dead ends: 930 [2021-12-16 05:51:04,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:51:04,813 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 842 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:04,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 691 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:51:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-12-16 05:51:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 375. [2021-12-16 05:51:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 297 states have (on average 1.7306397306397305) internal successors, (514), 362 states have internal predecessors, (514), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 05:51:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 534 transitions. [2021-12-16 05:51:04,830 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 534 transitions. Word has length 17 [2021-12-16 05:51:04,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:04,831 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 534 transitions. [2021-12-16 05:51:04,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 534 transitions. [2021-12-16 05:51:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:51:04,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:04,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:04,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 05:51:04,832 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:04,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:04,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1553554062, now seen corresponding path program 1 times [2021-12-16 05:51:04,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:04,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351138101] [2021-12-16 05:51:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:04,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:04,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:04,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:04,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351138101] [2021-12-16 05:51:04,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351138101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:04,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:04,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:51:04,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764089583] [2021-12-16 05:51:04,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:04,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:04,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:04,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:04,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:04,883 INFO L87 Difference]: Start difference. First operand 375 states and 534 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:04,917 INFO L93 Difference]: Finished difference Result 639 states and 892 transitions. [2021-12-16 05:51:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:51:04,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-16 05:51:04,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:04,920 INFO L225 Difference]: With dead ends: 639 [2021-12-16 05:51:04,920 INFO L226 Difference]: Without dead ends: 639 [2021-12-16 05:51:04,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:51:04,921 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 245 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:04,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1253 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:51:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-12-16 05:51:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 395. [2021-12-16 05:51:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 312 states have (on average 1.7019230769230769) internal successors, (531), 380 states have internal predecessors, (531), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 561 transitions. [2021-12-16 05:51:04,932 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 561 transitions. Word has length 18 [2021-12-16 05:51:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:04,933 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 561 transitions. [2021-12-16 05:51:04,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:04,933 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 561 transitions. [2021-12-16 05:51:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:51:04,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:04,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:04,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 05:51:04,934 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:04,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:04,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1553555984, now seen corresponding path program 1 times [2021-12-16 05:51:04,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:04,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765212645] [2021-12-16 05:51:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:04,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:05,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:05,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:05,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765212645] [2021-12-16 05:51:05,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765212645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:05,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:05,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:51:05,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921369318] [2021-12-16 05:51:05,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:05,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:51:05,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:05,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:51:05,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:51:05,053 INFO L87 Difference]: Start difference. First operand 395 states and 561 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:05,705 INFO L93 Difference]: Finished difference Result 820 states and 1039 transitions. [2021-12-16 05:51:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:51:05,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-16 05:51:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:05,708 INFO L225 Difference]: With dead ends: 820 [2021-12-16 05:51:05,708 INFO L226 Difference]: Without dead ends: 820 [2021-12-16 05:51:05,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:51:05,709 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 641 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:05,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 823 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 05:51:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-12-16 05:51:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 395. [2021-12-16 05:51:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 312 states have (on average 1.7019230769230769) internal successors, (531), 380 states have internal predecessors, (531), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 561 transitions. [2021-12-16 05:51:05,721 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 561 transitions. Word has length 18 [2021-12-16 05:51:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:05,722 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 561 transitions. [2021-12-16 05:51:05,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 561 transitions. [2021-12-16 05:51:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:51:05,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:05,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:05,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 05:51:05,723 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:05,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1357040557, now seen corresponding path program 1 times [2021-12-16 05:51:05,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:05,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649443283] [2021-12-16 05:51:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:05,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:05,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:05,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:05,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649443283] [2021-12-16 05:51:05,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649443283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:05,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:05,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:51:05,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964858932] [2021-12-16 05:51:05,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:05,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:51:05,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:05,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:51:05,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:51:05,855 INFO L87 Difference]: Start difference. First operand 395 states and 561 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:06,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:06,549 INFO L93 Difference]: Finished difference Result 818 states and 1036 transitions. [2021-12-16 05:51:06,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:51:06,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-16 05:51:06,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:06,553 INFO L225 Difference]: With dead ends: 818 [2021-12-16 05:51:06,553 INFO L226 Difference]: Without dead ends: 818 [2021-12-16 05:51:06,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:51:06,554 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 552 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:06,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 960 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 05:51:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-12-16 05:51:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 393. [2021-12-16 05:51:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 310 states have (on average 1.7032258064516128) internal successors, (528), 378 states have internal predecessors, (528), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 558 transitions. [2021-12-16 05:51:06,569 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 558 transitions. Word has length 18 [2021-12-16 05:51:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:06,569 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 558 transitions. [2021-12-16 05:51:06,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 558 transitions. [2021-12-16 05:51:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 05:51:06,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:06,570 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] [2021-12-16 05:51:06,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 05:51:06,570 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:06,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1279047357, now seen corresponding path program 1 times [2021-12-16 05:51:06,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:06,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098242191] [2021-12-16 05:51:06,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:06,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:06,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:06,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098242191] [2021-12-16 05:51:06,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098242191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:06,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:06,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 05:51:06,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358493326] [2021-12-16 05:51:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:06,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 05:51:06,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 05:51:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:51:06,886 INFO L87 Difference]: Start difference. First operand 393 states and 558 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:07,511 INFO L93 Difference]: Finished difference Result 751 states and 1035 transitions. [2021-12-16 05:51:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:51:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-16 05:51:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:07,515 INFO L225 Difference]: With dead ends: 751 [2021-12-16 05:51:07,525 INFO L226 Difference]: Without dead ends: 749 [2021-12-16 05:51:07,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:51:07,527 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 523 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:07,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 1606 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:51:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-16 05:51:07,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 387. [2021-12-16 05:51:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 304 states have (on average 1.700657894736842) internal successors, (517), 372 states have internal predecessors, (517), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 547 transitions. [2021-12-16 05:51:07,545 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 547 transitions. Word has length 21 [2021-12-16 05:51:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:07,545 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 547 transitions. [2021-12-16 05:51:07,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 547 transitions. [2021-12-16 05:51:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 05:51:07,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:07,548 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] [2021-12-16 05:51:07,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 05:51:07,548 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:07,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:07,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2000662896, now seen corresponding path program 1 times [2021-12-16 05:51:07,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:07,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500865604] [2021-12-16 05:51:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:07,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:07,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:07,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:07,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500865604] [2021-12-16 05:51:07,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500865604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:07,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:07,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 05:51:07,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010262008] [2021-12-16 05:51:07,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:07,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:51:07,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:51:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:51:07,741 INFO L87 Difference]: Start difference. First operand 387 states and 547 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:08,101 INFO L93 Difference]: Finished difference Result 552 states and 736 transitions. [2021-12-16 05:51:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:51:08,102 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-16 05:51:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:08,104 INFO L225 Difference]: With dead ends: 552 [2021-12-16 05:51:08,104 INFO L226 Difference]: Without dead ends: 552 [2021-12-16 05:51:08,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:51:08,104 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 202 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:08,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1102 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-12-16 05:51:08,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 411. [2021-12-16 05:51:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 328 states have (on average 1.6676829268292683) internal successors, (547), 392 states have internal predecessors, (547), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 577 transitions. [2021-12-16 05:51:08,114 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 577 transitions. Word has length 21 [2021-12-16 05:51:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:08,115 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 577 transitions. [2021-12-16 05:51:08,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 577 transitions. [2021-12-16 05:51:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 05:51:08,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:08,116 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] [2021-12-16 05:51:08,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 05:51:08,116 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:08,117 INFO L85 PathProgramCache]: Analyzing trace with hash -839353067, now seen corresponding path program 1 times [2021-12-16 05:51:08,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:08,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747314810] [2021-12-16 05:51:08,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:08,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:08,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:08,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:08,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747314810] [2021-12-16 05:51:08,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747314810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:08,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:08,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:51:08,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252197609] [2021-12-16 05:51:08,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:08,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:08,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:08,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:08,169 INFO L87 Difference]: Start difference. First operand 411 states and 577 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:08,205 INFO L93 Difference]: Finished difference Result 658 states and 908 transitions. [2021-12-16 05:51:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:51:08,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-16 05:51:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:08,208 INFO L225 Difference]: With dead ends: 658 [2021-12-16 05:51:08,208 INFO L226 Difference]: Without dead ends: 658 [2021-12-16 05:51:08,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:51:08,209 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 242 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:08,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 1257 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:51:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-12-16 05:51:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 409. [2021-12-16 05:51:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 326 states have (on average 1.6595092024539877) internal successors, (541), 390 states have internal predecessors, (541), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 571 transitions. [2021-12-16 05:51:08,218 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 571 transitions. Word has length 22 [2021-12-16 05:51:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:08,218 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 571 transitions. [2021-12-16 05:51:08,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 571 transitions. [2021-12-16 05:51:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 05:51:08,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:08,220 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] [2021-12-16 05:51:08,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 05:51:08,220 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:08,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1175048242, now seen corresponding path program 1 times [2021-12-16 05:51:08,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:08,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439439630] [2021-12-16 05:51:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:08,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:08,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:08,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:08,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439439630] [2021-12-16 05:51:08,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439439630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:08,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:08,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 05:51:08,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924093645] [2021-12-16 05:51:08,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:08,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:51:08,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:08,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:51:08,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:51:08,318 INFO L87 Difference]: Start difference. First operand 409 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:08,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:08,608 INFO L93 Difference]: Finished difference Result 586 states and 793 transitions. [2021-12-16 05:51:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 05:51:08,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-16 05:51:08,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:08,610 INFO L225 Difference]: With dead ends: 586 [2021-12-16 05:51:08,611 INFO L226 Difference]: Without dead ends: 586 [2021-12-16 05:51:08,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-16 05:51:08,611 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 193 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:08,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1274 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-12-16 05:51:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 411. [2021-12-16 05:51:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 328 states have (on average 1.6615853658536586) internal successors, (545), 392 states have internal predecessors, (545), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:08,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 575 transitions. [2021-12-16 05:51:08,621 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 575 transitions. Word has length 22 [2021-12-16 05:51:08,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:08,621 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 575 transitions. [2021-12-16 05:51:08,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:08,622 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 575 transitions. [2021-12-16 05:51:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 05:51:08,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:08,622 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] [2021-12-16 05:51:08,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 05:51:08,623 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:08,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:08,623 INFO L85 PathProgramCache]: Analyzing trace with hash -796222002, now seen corresponding path program 1 times [2021-12-16 05:51:08,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:08,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096319459] [2021-12-16 05:51:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:08,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:08,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:08,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:08,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096319459] [2021-12-16 05:51:08,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096319459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:08,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:08,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:51:08,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979088729] [2021-12-16 05:51:08,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:08,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:51:08,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:08,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:51:08,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:08,661 INFO L87 Difference]: Start difference. First operand 411 states and 575 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:08,828 INFO L93 Difference]: Finished difference Result 696 states and 934 transitions. [2021-12-16 05:51:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:51:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-16 05:51:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:08,831 INFO L225 Difference]: With dead ends: 696 [2021-12-16 05:51:08,831 INFO L226 Difference]: Without dead ends: 696 [2021-12-16 05:51:08,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:08,832 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 408 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:08,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 602 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-12-16 05:51:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 410. [2021-12-16 05:51:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 333 states have (on average 1.6096096096096095) internal successors, (536), 391 states have internal predecessors, (536), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 566 transitions. [2021-12-16 05:51:08,843 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 566 transitions. Word has length 23 [2021-12-16 05:51:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:08,843 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 566 transitions. [2021-12-16 05:51:08,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 566 transitions. [2021-12-16 05:51:08,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 05:51:08,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:08,844 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] [2021-12-16 05:51:08,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 05:51:08,845 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:08,845 INFO L85 PathProgramCache]: Analyzing trace with hash -796222001, now seen corresponding path program 1 times [2021-12-16 05:51:08,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:08,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374111727] [2021-12-16 05:51:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:08,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:08,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:08,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:08,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374111727] [2021-12-16 05:51:08,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374111727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:08,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:08,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:51:08,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455074940] [2021-12-16 05:51:08,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:08,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:51:08,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:08,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:51:08,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:08,892 INFO L87 Difference]: Start difference. First operand 410 states and 566 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:09,027 INFO L93 Difference]: Finished difference Result 456 states and 593 transitions. [2021-12-16 05:51:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:51:09,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-16 05:51:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:09,029 INFO L225 Difference]: With dead ends: 456 [2021-12-16 05:51:09,029 INFO L226 Difference]: Without dead ends: 456 [2021-12-16 05:51:09,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:09,030 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 171 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:09,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 429 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:09,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-16 05:51:09,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 410. [2021-12-16 05:51:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 333 states have (on average 1.5885885885885886) internal successors, (529), 391 states have internal predecessors, (529), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 559 transitions. [2021-12-16 05:51:09,038 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 559 transitions. Word has length 23 [2021-12-16 05:51:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:09,039 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 559 transitions. [2021-12-16 05:51:09,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 559 transitions. [2021-12-16 05:51:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:51:09,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:09,039 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] [2021-12-16 05:51:09,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 05:51:09,040 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:09,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1911985061, now seen corresponding path program 1 times [2021-12-16 05:51:09,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:09,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102389086] [2021-12-16 05:51:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:09,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:09,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:09,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102389086] [2021-12-16 05:51:09,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102389086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:09,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:09,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:51:09,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687698643] [2021-12-16 05:51:09,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:09,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:51:09,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:09,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:51:09,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:09,063 INFO L87 Difference]: Start difference. First operand 410 states and 559 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:09,079 INFO L93 Difference]: Finished difference Result 422 states and 571 transitions. [2021-12-16 05:51:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:51:09,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-16 05:51:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:09,081 INFO L225 Difference]: With dead ends: 422 [2021-12-16 05:51:09,081 INFO L226 Difference]: Without dead ends: 422 [2021-12-16 05:51:09,081 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 [2021-12-16 05:51:09,082 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 3 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:09,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 523 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:51:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-16 05:51:09,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 419. [2021-12-16 05:51:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 342 states have (on average 1.5730994152046784) internal successors, (538), 400 states have internal predecessors, (538), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 568 transitions. [2021-12-16 05:51:09,090 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 568 transitions. Word has length 25 [2021-12-16 05:51:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:09,090 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 568 transitions. [2021-12-16 05:51:09,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 568 transitions. [2021-12-16 05:51:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:51:09,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:09,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:09,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 05:51:09,092 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:09,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1913832103, now seen corresponding path program 1 times [2021-12-16 05:51:09,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:09,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640995366] [2021-12-16 05:51:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:09,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:09,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:09,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640995366] [2021-12-16 05:51:09,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640995366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:09,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:09,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:51:09,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207990588] [2021-12-16 05:51:09,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:09,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:51:09,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:51:09,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:09,157 INFO L87 Difference]: Start difference. First operand 419 states and 568 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:09,309 INFO L93 Difference]: Finished difference Result 702 states and 915 transitions. [2021-12-16 05:51:09,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:51:09,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-16 05:51:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:09,312 INFO L225 Difference]: With dead ends: 702 [2021-12-16 05:51:09,312 INFO L226 Difference]: Without dead ends: 702 [2021-12-16 05:51:09,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:09,312 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 327 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:09,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 444 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:09,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-16 05:51:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 478. [2021-12-16 05:51:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 402 states have (on average 1.554726368159204) internal successors, (625), 459 states have internal predecessors, (625), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 655 transitions. [2021-12-16 05:51:09,322 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 655 transitions. Word has length 25 [2021-12-16 05:51:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:09,322 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 655 transitions. [2021-12-16 05:51:09,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 655 transitions. [2021-12-16 05:51:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:51:09,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:09,323 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] [2021-12-16 05:51:09,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-16 05:51:09,324 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:09,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:09,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1913832102, now seen corresponding path program 1 times [2021-12-16 05:51:09,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:09,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900407414] [2021-12-16 05:51:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:09,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:09,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:09,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900407414] [2021-12-16 05:51:09,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900407414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:09,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:09,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:51:09,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364529956] [2021-12-16 05:51:09,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:09,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:51:09,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:09,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:51:09,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:51:09,344 INFO L87 Difference]: Start difference. First operand 478 states and 655 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:09,424 INFO L93 Difference]: Finished difference Result 558 states and 739 transitions. [2021-12-16 05:51:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:51:09,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-16 05:51:09,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:09,426 INFO L225 Difference]: With dead ends: 558 [2021-12-16 05:51:09,426 INFO L226 Difference]: Without dead ends: 558 [2021-12-16 05:51:09,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:51:09,427 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 141 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:09,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 266 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-16 05:51:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 475. [2021-12-16 05:51:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 402 states have (on average 1.5248756218905473) internal successors, (613), 456 states have internal predecessors, (613), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 643 transitions. [2021-12-16 05:51:09,436 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 643 transitions. Word has length 25 [2021-12-16 05:51:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:09,436 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 643 transitions. [2021-12-16 05:51:09,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 643 transitions. [2021-12-16 05:51:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 05:51:09,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:09,437 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] [2021-12-16 05:51:09,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-16 05:51:09,437 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:09,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2102112361, now seen corresponding path program 1 times [2021-12-16 05:51:09,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:09,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801550800] [2021-12-16 05:51:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:09,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:09,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:09,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801550800] [2021-12-16 05:51:09,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801550800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:09,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:09,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:51:09,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285751626] [2021-12-16 05:51:09,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:09,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:51:09,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:09,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:51:09,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:09,477 INFO L87 Difference]: Start difference. First operand 475 states and 643 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:09,631 INFO L93 Difference]: Finished difference Result 756 states and 984 transitions. [2021-12-16 05:51:09,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:51:09,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-16 05:51:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:09,642 INFO L225 Difference]: With dead ends: 756 [2021-12-16 05:51:09,642 INFO L226 Difference]: Without dead ends: 756 [2021-12-16 05:51:09,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:09,643 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 378 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:09,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 441 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:09,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-12-16 05:51:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 475. [2021-12-16 05:51:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 402 states have (on average 1.5248756218905473) internal successors, (613), 456 states have internal predecessors, (613), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 643 transitions. [2021-12-16 05:51:09,653 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 643 transitions. Word has length 26 [2021-12-16 05:51:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:09,654 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 643 transitions. [2021-12-16 05:51:09,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 643 transitions. [2021-12-16 05:51:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-16 05:51:09,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:09,655 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] [2021-12-16 05:51:09,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-16 05:51:09,655 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:09,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:09,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1491790357, now seen corresponding path program 1 times [2021-12-16 05:51:09,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:09,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927511289] [2021-12-16 05:51:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:09,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:09,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:09,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927511289] [2021-12-16 05:51:09,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927511289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:09,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:09,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:51:09,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210763818] [2021-12-16 05:51:09,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:09,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:09,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:09,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:09,726 INFO L87 Difference]: Start difference. First operand 475 states and 643 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:09,755 INFO L93 Difference]: Finished difference Result 660 states and 873 transitions. [2021-12-16 05:51:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:51:09,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-16 05:51:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:09,758 INFO L225 Difference]: With dead ends: 660 [2021-12-16 05:51:09,758 INFO L226 Difference]: Without dead ends: 660 [2021-12-16 05:51:09,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:51:09,759 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 229 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:09,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1439 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:51:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-12-16 05:51:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 414. [2021-12-16 05:51:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 342 states have (on average 1.5175438596491229) internal successors, (519), 395 states have internal predecessors, (519), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 549 transitions. [2021-12-16 05:51:09,768 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 549 transitions. Word has length 26 [2021-12-16 05:51:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:09,768 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 549 transitions. [2021-12-16 05:51:09,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 549 transitions. [2021-12-16 05:51:09,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:51:09,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:09,769 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] [2021-12-16 05:51:09,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-16 05:51:09,769 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash 731575509, now seen corresponding path program 1 times [2021-12-16 05:51:09,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:09,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703038273] [2021-12-16 05:51:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:09,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:09,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:09,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703038273] [2021-12-16 05:51:09,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703038273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:09,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:09,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:51:09,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082575895] [2021-12-16 05:51:09,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:09,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:51:09,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:09,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:51:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:09,847 INFO L87 Difference]: Start difference. First operand 414 states and 549 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:09,961 INFO L93 Difference]: Finished difference Result 482 states and 616 transitions. [2021-12-16 05:51:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:51:09,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-16 05:51:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:09,963 INFO L225 Difference]: With dead ends: 482 [2021-12-16 05:51:09,963 INFO L226 Difference]: Without dead ends: 482 [2021-12-16 05:51:09,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:51:09,963 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 155 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:09,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 650 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-12-16 05:51:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 414. [2021-12-16 05:51:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 342 states have (on average 1.5146198830409356) internal successors, (518), 395 states have internal predecessors, (518), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 548 transitions. [2021-12-16 05:51:09,970 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 548 transitions. Word has length 27 [2021-12-16 05:51:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:09,971 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 548 transitions. [2021-12-16 05:51:09,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 548 transitions. [2021-12-16 05:51:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:51:09,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:09,971 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] [2021-12-16 05:51:09,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-16 05:51:09,971 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:09,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:09,972 INFO L85 PathProgramCache]: Analyzing trace with hash 946649543, now seen corresponding path program 1 times [2021-12-16 05:51:09,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:09,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804033075] [2021-12-16 05:51:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:09,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:10,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:10,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:10,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804033075] [2021-12-16 05:51:10,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804033075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:10,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:10,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 05:51:10,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960269787] [2021-12-16 05:51:10,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:10,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:51:10,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:10,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:51:10,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:51:10,032 INFO L87 Difference]: Start difference. First operand 414 states and 548 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:10,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:10,177 INFO L93 Difference]: Finished difference Result 597 states and 778 transitions. [2021-12-16 05:51:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:51:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-16 05:51:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:10,180 INFO L225 Difference]: With dead ends: 597 [2021-12-16 05:51:10,180 INFO L226 Difference]: Without dead ends: 597 [2021-12-16 05:51:10,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:51:10,181 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 152 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:10,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1228 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-12-16 05:51:10,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 444. [2021-12-16 05:51:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 372 states have (on average 1.4865591397849462) internal successors, (553), 425 states have internal predecessors, (553), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 583 transitions. [2021-12-16 05:51:10,189 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 583 transitions. Word has length 27 [2021-12-16 05:51:10,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:10,189 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 583 transitions. [2021-12-16 05:51:10,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 583 transitions. [2021-12-16 05:51:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 05:51:10,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:10,190 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] [2021-12-16 05:51:10,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-16 05:51:10,190 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash 946649737, now seen corresponding path program 1 times [2021-12-16 05:51:10,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:10,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527319978] [2021-12-16 05:51:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:10,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:10,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:10,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:10,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527319978] [2021-12-16 05:51:10,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527319978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:10,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:10,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:51:10,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142529021] [2021-12-16 05:51:10,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:10,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:51:10,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:51:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:10,230 INFO L87 Difference]: Start difference. First operand 444 states and 583 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:10,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:10,381 INFO L93 Difference]: Finished difference Result 754 states and 953 transitions. [2021-12-16 05:51:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:51:10,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-16 05:51:10,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:10,383 INFO L225 Difference]: With dead ends: 754 [2021-12-16 05:51:10,383 INFO L226 Difference]: Without dead ends: 754 [2021-12-16 05:51:10,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:10,384 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 318 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:10,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 491 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:10,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-12-16 05:51:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 534. [2021-12-16 05:51:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 462 states have (on average 1.474025974025974) internal successors, (681), 515 states have internal predecessors, (681), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-16 05:51:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 711 transitions. [2021-12-16 05:51:10,393 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 711 transitions. Word has length 27 [2021-12-16 05:51:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:10,394 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 711 transitions. [2021-12-16 05:51:10,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 711 transitions. [2021-12-16 05:51:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 05:51:10,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:10,394 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] [2021-12-16 05:51:10,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-16 05:51:10,394 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:10,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1204004541, now seen corresponding path program 1 times [2021-12-16 05:51:10,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:10,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452404746] [2021-12-16 05:51:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:10,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:10,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:10,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:10,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452404746] [2021-12-16 05:51:10,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452404746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:10,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:10,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:51:10,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280922602] [2021-12-16 05:51:10,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:10,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:51:10,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:10,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:51:10,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:10,458 INFO L87 Difference]: Start difference. First operand 534 states and 711 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:10,615 INFO L93 Difference]: Finished difference Result 727 states and 939 transitions. [2021-12-16 05:51:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:51:10,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-16 05:51:10,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:10,618 INFO L225 Difference]: With dead ends: 727 [2021-12-16 05:51:10,618 INFO L226 Difference]: Without dead ends: 727 [2021-12-16 05:51:10,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:51:10,619 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 206 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:10,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 653 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-16 05:51:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 576. [2021-12-16 05:51:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 500 states have (on average 1.464) internal successors, (732), 555 states have internal predecessors, (732), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-16 05:51:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 768 transitions. [2021-12-16 05:51:10,629 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 768 transitions. Word has length 28 [2021-12-16 05:51:10,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:10,629 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 768 transitions. [2021-12-16 05:51:10,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:10,629 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 768 transitions. [2021-12-16 05:51:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 05:51:10,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:10,630 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] [2021-12-16 05:51:10,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-16 05:51:10,630 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:10,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1495351243, now seen corresponding path program 1 times [2021-12-16 05:51:10,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:10,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060658735] [2021-12-16 05:51:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:10,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:10,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:10,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:10,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060658735] [2021-12-16 05:51:10,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060658735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:10,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:10,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:51:10,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314276613] [2021-12-16 05:51:10,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:10,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:51:10,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:10,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:51:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:10,683 INFO L87 Difference]: Start difference. First operand 576 states and 768 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:10,838 INFO L93 Difference]: Finished difference Result 795 states and 1004 transitions. [2021-12-16 05:51:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:51:10,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-16 05:51:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:10,840 INFO L225 Difference]: With dead ends: 795 [2021-12-16 05:51:10,841 INFO L226 Difference]: Without dead ends: 795 [2021-12-16 05:51:10,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:10,841 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 305 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:10,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 504 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-12-16 05:51:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 485. [2021-12-16 05:51:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 410 states have (on average 1.4585365853658536) internal successors, (598), 464 states have internal predecessors, (598), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-16 05:51:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 634 transitions. [2021-12-16 05:51:10,851 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 634 transitions. Word has length 28 [2021-12-16 05:51:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:10,851 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 634 transitions. [2021-12-16 05:51:10,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 634 transitions. [2021-12-16 05:51:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 05:51:10,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:10,852 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] [2021-12-16 05:51:10,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-16 05:51:10,852 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1910467130, now seen corresponding path program 1 times [2021-12-16 05:51:10,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:10,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651503562] [2021-12-16 05:51:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:10,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:10,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:10,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:10,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651503562] [2021-12-16 05:51:10,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651503562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:10,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:10,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:51:10,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086420482] [2021-12-16 05:51:10,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:10,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:51:10,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:51:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:51:10,925 INFO L87 Difference]: Start difference. First operand 485 states and 634 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:11,155 INFO L93 Difference]: Finished difference Result 1182 states and 1551 transitions. [2021-12-16 05:51:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:51:11,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-16 05:51:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:11,159 INFO L225 Difference]: With dead ends: 1182 [2021-12-16 05:51:11,159 INFO L226 Difference]: Without dead ends: 1182 [2021-12-16 05:51:11,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:51:11,159 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 497 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:11,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 1678 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:11,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-12-16 05:51:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 597. [2021-12-16 05:51:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 522 states have (on average 1.4425287356321839) internal successors, (753), 570 states have internal predecessors, (753), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-16 05:51:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 789 transitions. [2021-12-16 05:51:11,172 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 789 transitions. Word has length 30 [2021-12-16 05:51:11,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:11,172 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 789 transitions. [2021-12-16 05:51:11,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:11,173 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 789 transitions. [2021-12-16 05:51:11,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 05:51:11,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:11,173 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] [2021-12-16 05:51:11,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-16 05:51:11,173 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:11,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:11,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1702169087, now seen corresponding path program 1 times [2021-12-16 05:51:11,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:11,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542514966] [2021-12-16 05:51:11,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:11,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:11,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:11,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:11,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542514966] [2021-12-16 05:51:11,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542514966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:11,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:11,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:51:11,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619449069] [2021-12-16 05:51:11,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:11,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:11,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:11,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:11,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:11,283 INFO L87 Difference]: Start difference. First operand 597 states and 789 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:11,665 INFO L93 Difference]: Finished difference Result 1110 states and 1433 transitions. [2021-12-16 05:51:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 05:51:11,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-16 05:51:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:11,668 INFO L225 Difference]: With dead ends: 1110 [2021-12-16 05:51:11,668 INFO L226 Difference]: Without dead ends: 1110 [2021-12-16 05:51:11,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:51:11,668 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 457 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:11,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1049 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:51:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-12-16 05:51:11,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 647. [2021-12-16 05:51:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 568 states have (on average 1.431338028169014) internal successors, (813), 617 states have internal predecessors, (813), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-16 05:51:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 855 transitions. [2021-12-16 05:51:11,681 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 855 transitions. Word has length 30 [2021-12-16 05:51:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:11,681 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 855 transitions. [2021-12-16 05:51:11,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 855 transitions. [2021-12-16 05:51:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 05:51:11,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:11,682 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] [2021-12-16 05:51:11,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-16 05:51:11,682 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:11,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1975675941, now seen corresponding path program 1 times [2021-12-16 05:51:11,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:11,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262273662] [2021-12-16 05:51:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:11,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:11,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:11,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:11,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262273662] [2021-12-16 05:51:11,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262273662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:11,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:11,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:51:11,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944473545] [2021-12-16 05:51:11,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:11,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:51:11,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:11,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:51:11,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:11,723 INFO L87 Difference]: Start difference. First operand 647 states and 855 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:11,750 INFO L93 Difference]: Finished difference Result 1013 states and 1334 transitions. [2021-12-16 05:51:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:51:11,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-16 05:51:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:11,754 INFO L225 Difference]: With dead ends: 1013 [2021-12-16 05:51:11,754 INFO L226 Difference]: Without dead ends: 1013 [2021-12-16 05:51:11,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:11,755 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 214 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:11,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1098 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:51:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-12-16 05:51:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 643. [2021-12-16 05:51:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 564 states have (on average 1.4308510638297873) internal successors, (807), 613 states have internal predecessors, (807), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-16 05:51:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 849 transitions. [2021-12-16 05:51:11,766 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 849 transitions. Word has length 30 [2021-12-16 05:51:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:11,766 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 849 transitions. [2021-12-16 05:51:11,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 849 transitions. [2021-12-16 05:51:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 05:51:11,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:11,767 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] [2021-12-16 05:51:11,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-16 05:51:11,767 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:11,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:11,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1977522983, now seen corresponding path program 1 times [2021-12-16 05:51:11,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:11,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3694415] [2021-12-16 05:51:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:11,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:11,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:11,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:11,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3694415] [2021-12-16 05:51:11,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3694415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:11,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:11,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:51:11,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027513341] [2021-12-16 05:51:11,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:11,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:51:11,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:51:11,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:11,816 INFO L87 Difference]: Start difference. First operand 643 states and 849 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:11,845 INFO L93 Difference]: Finished difference Result 1013 states and 1332 transitions. [2021-12-16 05:51:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:51:11,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-16 05:51:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:11,848 INFO L225 Difference]: With dead ends: 1013 [2021-12-16 05:51:11,849 INFO L226 Difference]: Without dead ends: 1013 [2021-12-16 05:51:11,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:11,850 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 210 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:11,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1098 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:51:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-12-16 05:51:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 643. [2021-12-16 05:51:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 564 states have (on average 1.427304964539007) internal successors, (805), 613 states have internal predecessors, (805), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-16 05:51:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 847 transitions. [2021-12-16 05:51:11,875 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 847 transitions. Word has length 30 [2021-12-16 05:51:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:11,875 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 847 transitions. [2021-12-16 05:51:11,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:11,876 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 847 transitions. [2021-12-16 05:51:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 05:51:11,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:11,876 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] [2021-12-16 05:51:11,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-16 05:51:11,877 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:11,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1977521061, now seen corresponding path program 1 times [2021-12-16 05:51:11,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:11,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216819603] [2021-12-16 05:51:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:11,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:11,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:11,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216819603] [2021-12-16 05:51:11,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216819603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:11,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:11,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:51:11,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877989852] [2021-12-16 05:51:11,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:11,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:51:11,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:51:11,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:51:11,972 INFO L87 Difference]: Start difference. First operand 643 states and 847 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:12,207 INFO L93 Difference]: Finished difference Result 1217 states and 1594 transitions. [2021-12-16 05:51:12,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:51:12,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-16 05:51:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:12,211 INFO L225 Difference]: With dead ends: 1217 [2021-12-16 05:51:12,211 INFO L226 Difference]: Without dead ends: 1217 [2021-12-16 05:51:12,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:51:12,212 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 458 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:12,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 1856 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-12-16 05:51:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 625. [2021-12-16 05:51:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 549 states have (on average 1.4153005464480874) internal successors, (777), 595 states have internal predecessors, (777), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-16 05:51:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 819 transitions. [2021-12-16 05:51:12,225 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 819 transitions. Word has length 30 [2021-12-16 05:51:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:12,226 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 819 transitions. [2021-12-16 05:51:12,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 819 transitions. [2021-12-16 05:51:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 05:51:12,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:12,226 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] [2021-12-16 05:51:12,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-16 05:51:12,227 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:12,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:12,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1227634393, now seen corresponding path program 1 times [2021-12-16 05:51:12,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:12,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834250414] [2021-12-16 05:51:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:12,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:12,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:12,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:12,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834250414] [2021-12-16 05:51:12,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834250414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:12,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:12,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:51:12,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022426351] [2021-12-16 05:51:12,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:12,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:51:12,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:51:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:51:12,328 INFO L87 Difference]: Start difference. First operand 625 states and 819 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:12,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:12,636 INFO L93 Difference]: Finished difference Result 887 states and 1128 transitions. [2021-12-16 05:51:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:51:12,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-12-16 05:51:12,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:12,638 INFO L225 Difference]: With dead ends: 887 [2021-12-16 05:51:12,638 INFO L226 Difference]: Without dead ends: 887 [2021-12-16 05:51:12,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:51:12,639 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 537 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:12,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 745 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-12-16 05:51:12,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 625. [2021-12-16 05:51:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 549 states have (on average 1.4080145719489983) internal successors, (773), 595 states have internal predecessors, (773), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-16 05:51:12,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 815 transitions. [2021-12-16 05:51:12,649 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 815 transitions. Word has length 31 [2021-12-16 05:51:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:12,650 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 815 transitions. [2021-12-16 05:51:12,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:12,650 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 815 transitions. [2021-12-16 05:51:12,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 05:51:12,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:12,650 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] [2021-12-16 05:51:12,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-16 05:51:12,651 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:12,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:12,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2007870586, now seen corresponding path program 1 times [2021-12-16 05:51:12,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:12,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721996980] [2021-12-16 05:51:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:12,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:12,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:12,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:12,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721996980] [2021-12-16 05:51:12,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721996980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:12,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:12,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:51:12,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006584354] [2021-12-16 05:51:12,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:12,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:12,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:12,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:12,794 INFO L87 Difference]: Start difference. First operand 625 states and 815 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:12,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:12,956 INFO L93 Difference]: Finished difference Result 673 states and 864 transitions. [2021-12-16 05:51:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:51:12,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-12-16 05:51:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:12,958 INFO L225 Difference]: With dead ends: 673 [2021-12-16 05:51:12,958 INFO L226 Difference]: Without dead ends: 673 [2021-12-16 05:51:12,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:51:12,959 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 108 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:12,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 813 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-12-16 05:51:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 604. [2021-12-16 05:51:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 528 states have (on average 1.4147727272727273) internal successors, (747), 576 states have internal predecessors, (747), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-16 05:51:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 789 transitions. [2021-12-16 05:51:12,968 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 789 transitions. Word has length 32 [2021-12-16 05:51:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:12,968 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 789 transitions. [2021-12-16 05:51:12,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 789 transitions. [2021-12-16 05:51:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-16 05:51:12,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:12,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:12,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-16 05:51:12,969 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:12,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:12,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1362637237, now seen corresponding path program 1 times [2021-12-16 05:51:12,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:12,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377832307] [2021-12-16 05:51:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:12,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:13,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:13,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:13,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377832307] [2021-12-16 05:51:13,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377832307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:13,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:13,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:51:13,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889969479] [2021-12-16 05:51:13,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:13,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:13,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:13,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:13,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:13,007 INFO L87 Difference]: Start difference. First operand 604 states and 789 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:13,162 INFO L93 Difference]: Finished difference Result 701 states and 906 transitions. [2021-12-16 05:51:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:51:13,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-16 05:51:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:13,165 INFO L225 Difference]: With dead ends: 701 [2021-12-16 05:51:13,165 INFO L226 Difference]: Without dead ends: 701 [2021-12-16 05:51:13,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:51:13,165 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 440 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:13,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 559 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-12-16 05:51:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 603. [2021-12-16 05:51:13,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 528 states have (on average 1.4109848484848484) internal successors, (745), 575 states have internal predecessors, (745), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-16 05:51:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 787 transitions. [2021-12-16 05:51:13,180 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 787 transitions. Word has length 35 [2021-12-16 05:51:13,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:13,180 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 787 transitions. [2021-12-16 05:51:13,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 787 transitions. [2021-12-16 05:51:13,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-16 05:51:13,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:13,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:13,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-16 05:51:13,181 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:13,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1362637238, now seen corresponding path program 1 times [2021-12-16 05:51:13,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:13,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035760643] [2021-12-16 05:51:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:13,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:13,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:13,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:13,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035760643] [2021-12-16 05:51:13,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035760643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:13,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:13,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:51:13,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903641854] [2021-12-16 05:51:13,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:13,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:13,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:13,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:13,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:13,267 INFO L87 Difference]: Start difference. First operand 603 states and 787 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:13,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:13,421 INFO L93 Difference]: Finished difference Result 634 states and 802 transitions. [2021-12-16 05:51:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:51:13,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-16 05:51:13,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:13,423 INFO L225 Difference]: With dead ends: 634 [2021-12-16 05:51:13,423 INFO L226 Difference]: Without dead ends: 634 [2021-12-16 05:51:13,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:51:13,424 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 472 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:13,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 582 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:13,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-16 05:51:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 602. [2021-12-16 05:51:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 528 states have (on average 1.4071969696969697) internal successors, (743), 574 states have internal predecessors, (743), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-16 05:51:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 785 transitions. [2021-12-16 05:51:13,433 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 785 transitions. Word has length 35 [2021-12-16 05:51:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:13,433 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 785 transitions. [2021-12-16 05:51:13,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:13,433 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 785 transitions. [2021-12-16 05:51:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 05:51:13,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:13,434 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] [2021-12-16 05:51:13,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-16 05:51:13,434 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:13,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:13,435 INFO L85 PathProgramCache]: Analyzing trace with hash -470637162, now seen corresponding path program 1 times [2021-12-16 05:51:13,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:13,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354792620] [2021-12-16 05:51:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:13,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:13,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:13,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:13,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354792620] [2021-12-16 05:51:13,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354792620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:13,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:13,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:51:13,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33160310] [2021-12-16 05:51:13,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:13,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:51:13,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:13,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:51:13,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:13,487 INFO L87 Difference]: Start difference. First operand 602 states and 785 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:13,682 INFO L93 Difference]: Finished difference Result 1011 states and 1290 transitions. [2021-12-16 05:51:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:51:13,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-16 05:51:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:13,685 INFO L225 Difference]: With dead ends: 1011 [2021-12-16 05:51:13,685 INFO L226 Difference]: Without dead ends: 1011 [2021-12-16 05:51:13,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:13,686 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 377 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:13,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 706 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:13,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-12-16 05:51:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 599. [2021-12-16 05:51:13,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 528 states have (on average 1.3958333333333333) internal successors, (737), 571 states have internal predecessors, (737), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-16 05:51:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 779 transitions. [2021-12-16 05:51:13,700 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 779 transitions. Word has length 37 [2021-12-16 05:51:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:13,700 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 779 transitions. [2021-12-16 05:51:13,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 779 transitions. [2021-12-16 05:51:13,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 05:51:13,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:13,701 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] [2021-12-16 05:51:13,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-16 05:51:13,701 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:13,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:13,702 INFO L85 PathProgramCache]: Analyzing trace with hash -470637161, now seen corresponding path program 1 times [2021-12-16 05:51:13,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:13,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009965702] [2021-12-16 05:51:13,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:13,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:13,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:13,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:13,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009965702] [2021-12-16 05:51:13,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009965702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:13,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:13,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:51:13,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288747129] [2021-12-16 05:51:13,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:13,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:13,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:13,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:13,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:13,793 INFO L87 Difference]: Start difference. First operand 599 states and 779 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:13,998 INFO L93 Difference]: Finished difference Result 845 states and 1065 transitions. [2021-12-16 05:51:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:51:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-16 05:51:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:14,001 INFO L225 Difference]: With dead ends: 845 [2021-12-16 05:51:14,001 INFO L226 Difference]: Without dead ends: 845 [2021-12-16 05:51:14,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:51:14,001 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 691 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:14,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 594 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-16 05:51:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 598. [2021-12-16 05:51:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 528 states have (on average 1.3920454545454546) internal successors, (735), 570 states have internal predecessors, (735), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-16 05:51:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 777 transitions. [2021-12-16 05:51:14,015 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 777 transitions. Word has length 37 [2021-12-16 05:51:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:14,015 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 777 transitions. [2021-12-16 05:51:14,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 777 transitions. [2021-12-16 05:51:14,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 05:51:14,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:14,016 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] [2021-12-16 05:51:14,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-16 05:51:14,016 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash -470637000, now seen corresponding path program 1 times [2021-12-16 05:51:14,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:14,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60382103] [2021-12-16 05:51:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:14,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:14,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:14,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:14,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60382103] [2021-12-16 05:51:14,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60382103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:14,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:14,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:51:14,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008388247] [2021-12-16 05:51:14,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:14,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:51:14,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:14,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:51:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:14,119 INFO L87 Difference]: Start difference. First operand 598 states and 777 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:14,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:14,312 INFO L93 Difference]: Finished difference Result 794 states and 989 transitions. [2021-12-16 05:51:14,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:51:14,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-16 05:51:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:14,314 INFO L225 Difference]: With dead ends: 794 [2021-12-16 05:51:14,314 INFO L226 Difference]: Without dead ends: 794 [2021-12-16 05:51:14,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:14,315 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 573 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:14,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 418 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:14,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-12-16 05:51:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 598. [2021-12-16 05:51:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 528 states have (on average 1.3882575757575757) internal successors, (733), 570 states have internal predecessors, (733), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-16 05:51:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 775 transitions. [2021-12-16 05:51:14,330 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 775 transitions. Word has length 37 [2021-12-16 05:51:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:14,331 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 775 transitions. [2021-12-16 05:51:14,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 775 transitions. [2021-12-16 05:51:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 05:51:14,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:14,332 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 05:51:14,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-16 05:51:14,332 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:14,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:14,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1641938402, now seen corresponding path program 1 times [2021-12-16 05:51:14,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:14,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469711417] [2021-12-16 05:51:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:14,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:14,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:14,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 05:51:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:51:14,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:14,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469711417] [2021-12-16 05:51:14,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469711417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:51:14,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973551977] [2021-12-16 05:51:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:14,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:51:14,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:51:14,387 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) [2021-12-16 05:51:14,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:51:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:14,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 05:51:14,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:51:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:14,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:51:14,838 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-16 05:51:14,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-16 05:51:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:51:14,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973551977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:51:14,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:51:14,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-16 05:51:14,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577940572] [2021-12-16 05:51:14,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:51:14,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:51:14,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:14,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:51:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:51:14,907 INFO L87 Difference]: Start difference. First operand 598 states and 775 transitions. Second operand has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:51:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:15,571 INFO L93 Difference]: Finished difference Result 1823 states and 2246 transitions. [2021-12-16 05:51:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 05:51:15,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2021-12-16 05:51:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:15,578 INFO L225 Difference]: With dead ends: 1823 [2021-12-16 05:51:15,578 INFO L226 Difference]: Without dead ends: 1823 [2021-12-16 05:51:15,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-12-16 05:51:15,579 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 3075 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3077 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:15,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3077 Valid, 1399 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:51:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-12-16 05:51:15,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 753. [2021-12-16 05:51:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 671 states have (on average 1.3770491803278688) internal successors, (924), 714 states have internal predecessors, (924), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 28 states have call predecessors, (40), 20 states have call successors, (40) [2021-12-16 05:51:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 984 transitions. [2021-12-16 05:51:15,597 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 984 transitions. Word has length 43 [2021-12-16 05:51:15,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:15,597 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 984 transitions. [2021-12-16 05:51:15,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 05:51:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 984 transitions. [2021-12-16 05:51:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 05:51:15,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:15,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:15,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:51:15,819 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,SelfDestructingSolverStorable42 [2021-12-16 05:51:15,819 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:15,820 INFO L85 PathProgramCache]: Analyzing trace with hash -974885366, now seen corresponding path program 1 times [2021-12-16 05:51:15,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:15,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051618228] [2021-12-16 05:51:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:15,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:15,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:15,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:15,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051618228] [2021-12-16 05:51:15,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051618228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:15,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:15,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:51:15,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384735291] [2021-12-16 05:51:15,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:15,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:51:15,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:15,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:51:15,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:15,881 INFO L87 Difference]: Start difference. First operand 753 states and 984 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:15,901 INFO L93 Difference]: Finished difference Result 892 states and 1148 transitions. [2021-12-16 05:51:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:51:15,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-16 05:51:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:15,903 INFO L225 Difference]: With dead ends: 892 [2021-12-16 05:51:15,903 INFO L226 Difference]: Without dead ends: 892 [2021-12-16 05:51:15,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:51:15,904 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 152 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:15,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 582 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:51:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-12-16 05:51:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 709. [2021-12-16 05:51:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 631 states have (on average 1.3851030110935023) internal successors, (874), 674 states have internal predecessors, (874), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-16 05:51:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 928 transitions. [2021-12-16 05:51:15,913 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 928 transitions. Word has length 45 [2021-12-16 05:51:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:15,913 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 928 transitions. [2021-12-16 05:51:15,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 928 transitions. [2021-12-16 05:51:15,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 05:51:15,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:15,915 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:15,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-16 05:51:15,915 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:15,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1845991888, now seen corresponding path program 1 times [2021-12-16 05:51:15,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:15,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229693437] [2021-12-16 05:51:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:15,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:15,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 05:51:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:15,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:15,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229693437] [2021-12-16 05:51:15,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229693437] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:51:15,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799447945] [2021-12-16 05:51:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:15,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:51:15,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:51:15,977 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) [2021-12-16 05:51:16,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:51:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:16,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 05:51:16,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:51:16,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:51:16,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 05:51:16,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:51:16,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 05:51:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:51:16,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:51:16,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799447945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:16,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:51:16,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-16 05:51:16,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012527074] [2021-12-16 05:51:16,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:16,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:51:16,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:51:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:51:16,346 INFO L87 Difference]: Start difference. First operand 709 states and 928 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:16,662 INFO L93 Difference]: Finished difference Result 611 states and 772 transitions. [2021-12-16 05:51:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:51:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-16 05:51:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:16,664 INFO L225 Difference]: With dead ends: 611 [2021-12-16 05:51:16,664 INFO L226 Difference]: Without dead ends: 611 [2021-12-16 05:51:16,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:51:16,665 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 286 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:16,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 1400 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:16,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-12-16 05:51:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 444. [2021-12-16 05:51:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 386 states have (on average 1.4145077720207253) internal successors, (546), 424 states have internal predecessors, (546), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-16 05:51:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 570 transitions. [2021-12-16 05:51:16,671 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 570 transitions. Word has length 45 [2021-12-16 05:51:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:16,672 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 570 transitions. [2021-12-16 05:51:16,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 570 transitions. [2021-12-16 05:51:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 05:51:16,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:16,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:16,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:51:16,896 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,SelfDestructingSolverStorable44 [2021-12-16 05:51:16,896 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash -102248492, now seen corresponding path program 1 times [2021-12-16 05:51:16,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:16,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150415202] [2021-12-16 05:51:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:16,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:17,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:17,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:17,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150415202] [2021-12-16 05:51:17,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150415202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:17,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:17,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 05:51:17,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390071022] [2021-12-16 05:51:17,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:17,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:51:17,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:17,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:51:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:51:17,121 INFO L87 Difference]: Start difference. First operand 444 states and 570 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:17,541 INFO L93 Difference]: Finished difference Result 848 states and 1092 transitions. [2021-12-16 05:51:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:51:17,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-12-16 05:51:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:17,544 INFO L225 Difference]: With dead ends: 848 [2021-12-16 05:51:17,544 INFO L226 Difference]: Without dead ends: 848 [2021-12-16 05:51:17,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:51:17,545 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 866 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:17,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 677 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:51:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-12-16 05:51:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 445. [2021-12-16 05:51:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 388 states have (on average 1.4097938144329898) internal successors, (547), 425 states have internal predecessors, (547), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-16 05:51:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 571 transitions. [2021-12-16 05:51:17,553 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 571 transitions. Word has length 48 [2021-12-16 05:51:17,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:17,553 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 571 transitions. [2021-12-16 05:51:17,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 571 transitions. [2021-12-16 05:51:17,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 05:51:17,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:17,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:17,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-16 05:51:17,554 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:17,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:17,555 INFO L85 PathProgramCache]: Analyzing trace with hash -102248430, now seen corresponding path program 1 times [2021-12-16 05:51:17,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:17,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127036994] [2021-12-16 05:51:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:17,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:17,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:17,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:17,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127036994] [2021-12-16 05:51:17,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127036994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:17,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:17,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:51:17,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130053045] [2021-12-16 05:51:17,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:17,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:17,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:17,668 INFO L87 Difference]: Start difference. First operand 445 states and 571 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:17,811 INFO L93 Difference]: Finished difference Result 460 states and 584 transitions. [2021-12-16 05:51:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:51:17,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-12-16 05:51:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:17,812 INFO L225 Difference]: With dead ends: 460 [2021-12-16 05:51:17,812 INFO L226 Difference]: Without dead ends: 460 [2021-12-16 05:51:17,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:51:17,813 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 304 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:17,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 318 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-16 05:51:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 442. [2021-12-16 05:51:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 386 states have (on average 1.4041450777202074) internal successors, (542), 422 states have internal predecessors, (542), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-16 05:51:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 566 transitions. [2021-12-16 05:51:17,819 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 566 transitions. Word has length 48 [2021-12-16 05:51:17,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:17,819 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 566 transitions. [2021-12-16 05:51:17,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:17,819 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 566 transitions. [2021-12-16 05:51:17,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 05:51:17,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:17,820 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, 1, 1] [2021-12-16 05:51:17,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-16 05:51:17,820 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1483644560, now seen corresponding path program 1 times [2021-12-16 05:51:17,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:17,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415786186] [2021-12-16 05:51:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:17,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:17,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:17,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 05:51:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:51:17,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:17,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415786186] [2021-12-16 05:51:17,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415786186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:17,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:17,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:51:17,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511756534] [2021-12-16 05:51:17,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:17,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:17,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:17,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:17,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:17,901 INFO L87 Difference]: Start difference. First operand 442 states and 566 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:51:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:18,057 INFO L93 Difference]: Finished difference Result 509 states and 652 transitions. [2021-12-16 05:51:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:51:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-12-16 05:51:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:18,059 INFO L225 Difference]: With dead ends: 509 [2021-12-16 05:51:18,059 INFO L226 Difference]: Without dead ends: 509 [2021-12-16 05:51:18,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:51:18,060 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 357 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:18,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 316 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:51:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-12-16 05:51:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 440. [2021-12-16 05:51:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 386 states have (on average 1.3730569948186528) internal successors, (530), 420 states have internal predecessors, (530), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-16 05:51:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 554 transitions. [2021-12-16 05:51:18,066 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 554 transitions. Word has length 50 [2021-12-16 05:51:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:18,066 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 554 transitions. [2021-12-16 05:51:18,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:51:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 554 transitions. [2021-12-16 05:51:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 05:51:18,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:18,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:18,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-16 05:51:18,067 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash -952792567, now seen corresponding path program 1 times [2021-12-16 05:51:18,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:18,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620604211] [2021-12-16 05:51:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:18,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:18,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:18,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:18,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620604211] [2021-12-16 05:51:18,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620604211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:51:18,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287194633] [2021-12-16 05:51:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:18,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:51:18,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:51:18,348 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) [2021-12-16 05:51:18,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:51:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:18,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 05:51:18,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:51:18,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-16 05:51:19,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:51:19,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 9 [2021-12-16 05:51:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:19,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:51:19,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287194633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:19,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:51:19,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2021-12-16 05:51:19,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578634916] [2021-12-16 05:51:19,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:19,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 05:51:19,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:19,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 05:51:19,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:51:19,642 INFO L87 Difference]: Start difference. First operand 440 states and 554 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:19,831 INFO L93 Difference]: Finished difference Result 549 states and 682 transitions. [2021-12-16 05:51:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 05:51:19,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-16 05:51:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:19,833 INFO L225 Difference]: With dead ends: 549 [2021-12-16 05:51:19,833 INFO L226 Difference]: Without dead ends: 549 [2021-12-16 05:51:19,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-12-16 05:51:19,834 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 85 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:19,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1258 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 249 Unchecked, 0.1s Time] [2021-12-16 05:51:19,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-12-16 05:51:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 527. [2021-12-16 05:51:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 467 states have (on average 1.3554603854389722) internal successors, (633), 503 states have internal predecessors, (633), 11 states have call successors, (11), 6 states have call predecessors, (11), 12 states have return successors, (22), 17 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-16 05:51:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 666 transitions. [2021-12-16 05:51:19,843 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 666 transitions. Word has length 51 [2021-12-16 05:51:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:19,844 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 666 transitions. [2021-12-16 05:51:19,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 666 transitions. [2021-12-16 05:51:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 05:51:19,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:19,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:19,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:51:20,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:51:20,059 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:20,060 INFO L85 PathProgramCache]: Analyzing trace with hash -952792566, now seen corresponding path program 1 times [2021-12-16 05:51:20,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:20,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156991358] [2021-12-16 05:51:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:20,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:20,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:20,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:20,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156991358] [2021-12-16 05:51:20,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156991358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:20,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:20,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 05:51:20,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192755132] [2021-12-16 05:51:20,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:20,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:51:20,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:20,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:51:20,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:51:20,371 INFO L87 Difference]: Start difference. First operand 527 states and 666 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:21,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:21,458 INFO L93 Difference]: Finished difference Result 1606 states and 2030 transitions. [2021-12-16 05:51:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 05:51:21,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-16 05:51:21,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:21,462 INFO L225 Difference]: With dead ends: 1606 [2021-12-16 05:51:21,462 INFO L226 Difference]: Without dead ends: 1606 [2021-12-16 05:51:21,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-12-16 05:51:21,463 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 1078 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:21,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1080 Valid, 1913 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 05:51:21,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-12-16 05:51:21,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 785. [2021-12-16 05:51:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 713 states have (on average 1.3576437587657784) internal successors, (968), 752 states have internal predecessors, (968), 17 states have call successors, (17), 9 states have call predecessors, (17), 18 states have return successors, (34), 23 states have call predecessors, (34), 17 states have call successors, (34) [2021-12-16 05:51:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1019 transitions. [2021-12-16 05:51:21,480 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1019 transitions. Word has length 51 [2021-12-16 05:51:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:21,480 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1019 transitions. [2021-12-16 05:51:21,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1019 transitions. [2021-12-16 05:51:21,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 05:51:21,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:21,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:21,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-16 05:51:21,482 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:21,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:21,482 INFO L85 PathProgramCache]: Analyzing trace with hash -950945525, now seen corresponding path program 1 times [2021-12-16 05:51:21,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:21,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816820366] [2021-12-16 05:51:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:21,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:21,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:22,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:22,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816820366] [2021-12-16 05:51:22,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816820366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:22,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:22,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 05:51:22,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269271906] [2021-12-16 05:51:22,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:22,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:51:22,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:51:22,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:51:22,004 INFO L87 Difference]: Start difference. First operand 785 states and 1019 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:22,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:22,505 INFO L93 Difference]: Finished difference Result 777 states and 992 transitions. [2021-12-16 05:51:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:51:22,506 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-16 05:51:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:22,507 INFO L225 Difference]: With dead ends: 777 [2021-12-16 05:51:22,507 INFO L226 Difference]: Without dead ends: 777 [2021-12-16 05:51:22,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:51:22,508 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 165 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:22,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1131 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:51:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-12-16 05:51:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 736. [2021-12-16 05:51:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 668 states have (on average 1.3547904191616766) internal successors, (905), 706 states have internal predecessors, (905), 15 states have call successors, (15), 8 states have call predecessors, (15), 16 states have return successors, (30), 21 states have call predecessors, (30), 15 states have call successors, (30) [2021-12-16 05:51:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 950 transitions. [2021-12-16 05:51:22,517 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 950 transitions. Word has length 51 [2021-12-16 05:51:22,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:22,518 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 950 transitions. [2021-12-16 05:51:22,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 950 transitions. [2021-12-16 05:51:22,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 05:51:22,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:22,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:22,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-16 05:51:22,519 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:22,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:22,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1401489206, now seen corresponding path program 1 times [2021-12-16 05:51:22,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:22,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526064243] [2021-12-16 05:51:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:22,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:22,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:22,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:22,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526064243] [2021-12-16 05:51:22,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526064243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:22,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:22,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:51:22,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114739605] [2021-12-16 05:51:22,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:22,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:51:22,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:22,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:51:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:51:22,585 INFO L87 Difference]: Start difference. First operand 736 states and 950 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:22,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:22,619 INFO L93 Difference]: Finished difference Result 1055 states and 1362 transitions. [2021-12-16 05:51:22,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:51:22,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-16 05:51:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:22,622 INFO L225 Difference]: With dead ends: 1055 [2021-12-16 05:51:22,622 INFO L226 Difference]: Without dead ends: 1055 [2021-12-16 05:51:22,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:51:22,623 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 202 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:22,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1137 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:51:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-12-16 05:51:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 732. [2021-12-16 05:51:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 664 states have (on average 1.3509036144578312) internal successors, (897), 702 states have internal predecessors, (897), 15 states have call successors, (15), 8 states have call predecessors, (15), 16 states have return successors, (30), 21 states have call predecessors, (30), 15 states have call successors, (30) [2021-12-16 05:51:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 942 transitions. [2021-12-16 05:51:22,639 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 942 transitions. Word has length 51 [2021-12-16 05:51:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:22,639 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 942 transitions. [2021-12-16 05:51:22,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:22,640 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 942 transitions. [2021-12-16 05:51:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 05:51:22,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:22,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:22,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-16 05:51:22,641 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:22,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash 764231220, now seen corresponding path program 1 times [2021-12-16 05:51:22,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:22,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140743464] [2021-12-16 05:51:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:22,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:22,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:22,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:22,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140743464] [2021-12-16 05:51:22,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140743464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:51:22,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685187885] [2021-12-16 05:51:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:22,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:51:22,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:51:22,934 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) [2021-12-16 05:51:22,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:51:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:23,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-16 05:51:23,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:51:23,119 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:51:23,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:51:23,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 05:51:23,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 05:51:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:51:23,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 05:51:23,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:51:23,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-16 05:51:23,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-16 05:51:23,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-16 05:51:23,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 05:51:23,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 05:51:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:23,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:51:23,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685187885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:23,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:51:23,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 23 [2021-12-16 05:51:23,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136012943] [2021-12-16 05:51:23,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:23,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:51:23,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:51:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:51:23,619 INFO L87 Difference]: Start difference. First operand 732 states and 942 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:24,396 INFO L93 Difference]: Finished difference Result 1369 states and 1704 transitions. [2021-12-16 05:51:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 05:51:24,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-16 05:51:24,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:24,399 INFO L225 Difference]: With dead ends: 1369 [2021-12-16 05:51:24,400 INFO L226 Difference]: Without dead ends: 1369 [2021-12-16 05:51:24,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-12-16 05:51:24,400 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 758 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1956 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:24,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 1956 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:51:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-12-16 05:51:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 735. [2021-12-16 05:51:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 667 states have (on average 1.3478260869565217) internal successors, (899), 705 states have internal predecessors, (899), 15 states have call successors, (15), 8 states have call predecessors, (15), 16 states have return successors, (30), 21 states have call predecessors, (30), 15 states have call successors, (30) [2021-12-16 05:51:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 944 transitions. [2021-12-16 05:51:24,415 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 944 transitions. Word has length 52 [2021-12-16 05:51:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:24,415 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 944 transitions. [2021-12-16 05:51:24,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 944 transitions. [2021-12-16 05:51:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 05:51:24,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:24,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:24,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:51:24,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:51:24,631 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash 945744203, now seen corresponding path program 1 times [2021-12-16 05:51:24,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:24,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202736476] [2021-12-16 05:51:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:24,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:24,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:24,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:24,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202736476] [2021-12-16 05:51:24,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202736476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:51:24,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241866327] [2021-12-16 05:51:24,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:24,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:51:24,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:51:24,928 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) [2021-12-16 05:51:24,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:51:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:25,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-16 05:51:25,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:51:25,241 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 05:51:25,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-16 05:51:25,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 05:51:25,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 05:51:25,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 05:51:25,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 05:51:25,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 05:51:25,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 05:51:25,663 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-16 05:51:25,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-12-16 05:51:25,674 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-16 05:51:25,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-12-16 05:51:26,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:51:26,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:51:26,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 28 [2021-12-16 05:51:26,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:51:26,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-12-16 05:51:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:26,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:51:26,932 INFO L354 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2021-12-16 05:51:26,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-12-16 05:51:27,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241866327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:51:27,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:51:27,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-12-16 05:51:27,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695629216] [2021-12-16 05:51:27,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:51:27,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 05:51:27,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 05:51:27,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1082, Unknown=6, NotChecked=0, Total=1260 [2021-12-16 05:51:27,799 INFO L87 Difference]: Start difference. First operand 735 states and 944 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 21 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 05:51:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:28,330 INFO L93 Difference]: Finished difference Result 771 states and 990 transitions. [2021-12-16 05:51:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 05:51:28,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 21 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2021-12-16 05:51:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:28,335 INFO L225 Difference]: With dead ends: 771 [2021-12-16 05:51:28,335 INFO L226 Difference]: Without dead ends: 771 [2021-12-16 05:51:28,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=321, Invalid=1835, Unknown=6, NotChecked=0, Total=2162 [2021-12-16 05:51:28,336 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 93 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:28,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 2182 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 384 Invalid, 0 Unknown, 388 Unchecked, 0.2s Time] [2021-12-16 05:51:28,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-12-16 05:51:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 766. [2021-12-16 05:51:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 698 states have (on average 1.340974212034384) internal successors, (936), 736 states have internal predecessors, (936), 15 states have call successors, (15), 8 states have call predecessors, (15), 16 states have return successors, (30), 21 states have call predecessors, (30), 15 states have call successors, (30) [2021-12-16 05:51:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 981 transitions. [2021-12-16 05:51:28,371 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 981 transitions. Word has length 52 [2021-12-16 05:51:28,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:28,371 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 981 transitions. [2021-12-16 05:51:28,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 21 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 05:51:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 981 transitions. [2021-12-16 05:51:28,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 05:51:28,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:28,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:28,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:51:28,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:51:28,591 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:28,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:28,591 INFO L85 PathProgramCache]: Analyzing trace with hash 947591245, now seen corresponding path program 1 times [2021-12-16 05:51:28,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:28,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456741728] [2021-12-16 05:51:28,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:28,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:28,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:28,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:28,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456741728] [2021-12-16 05:51:28,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456741728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:28,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:28,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 05:51:28,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307465760] [2021-12-16 05:51:28,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:28,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 05:51:28,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 05:51:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:51:28,820 INFO L87 Difference]: Start difference. First operand 766 states and 981 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:29,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:29,734 INFO L93 Difference]: Finished difference Result 1810 states and 2320 transitions. [2021-12-16 05:51:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 05:51:29,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-16 05:51:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:29,737 INFO L225 Difference]: With dead ends: 1810 [2021-12-16 05:51:29,737 INFO L226 Difference]: Without dead ends: 1810 [2021-12-16 05:51:29,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-12-16 05:51:29,738 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 965 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:29,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 2019 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 05:51:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-12-16 05:51:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 968. [2021-12-16 05:51:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 888 states have (on average 1.3502252252252251) internal successors, (1199), 929 states have internal predecessors, (1199), 21 states have call successors, (21), 11 states have call predecessors, (21), 22 states have return successors, (42), 27 states have call predecessors, (42), 21 states have call successors, (42) [2021-12-16 05:51:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1262 transitions. [2021-12-16 05:51:29,755 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1262 transitions. Word has length 52 [2021-12-16 05:51:29,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:29,756 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1262 transitions. [2021-12-16 05:51:29,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1262 transitions. [2021-12-16 05:51:29,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 05:51:29,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:29,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:29,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-16 05:51:29,757 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:29,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:29,758 INFO L85 PathProgramCache]: Analyzing trace with hash 947591246, now seen corresponding path program 1 times [2021-12-16 05:51:29,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:29,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062201228] [2021-12-16 05:51:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:29,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:30,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:30,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:30,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062201228] [2021-12-16 05:51:30,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062201228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:30,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:30,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 05:51:30,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817225478] [2021-12-16 05:51:30,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:30,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:51:30,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:30,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:51:30,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:51:30,058 INFO L87 Difference]: Start difference. First operand 968 states and 1262 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:31,097 INFO L93 Difference]: Finished difference Result 1749 states and 2248 transitions. [2021-12-16 05:51:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-16 05:51:31,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-16 05:51:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:31,102 INFO L225 Difference]: With dead ends: 1749 [2021-12-16 05:51:31,102 INFO L226 Difference]: Without dead ends: 1749 [2021-12-16 05:51:31,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-12-16 05:51:31,103 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 788 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 2276 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:31,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 2276 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 05:51:31,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-12-16 05:51:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1015. [2021-12-16 05:51:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 931 states have (on average 1.351235230934479) internal successors, (1258), 973 states have internal predecessors, (1258), 23 states have call successors, (23), 12 states have call predecessors, (23), 24 states have return successors, (46), 29 states have call predecessors, (46), 23 states have call successors, (46) [2021-12-16 05:51:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1327 transitions. [2021-12-16 05:51:31,128 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1327 transitions. Word has length 52 [2021-12-16 05:51:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:31,128 INFO L470 AbstractCegarLoop]: Abstraction has 1015 states and 1327 transitions. [2021-12-16 05:51:31,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1327 transitions. [2021-12-16 05:51:31,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 05:51:31,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:31,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:31,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-16 05:51:31,130 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:31,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash -689191823, now seen corresponding path program 1 times [2021-12-16 05:51:31,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:31,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407267316] [2021-12-16 05:51:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:31,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:31,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:31,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:31,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407267316] [2021-12-16 05:51:31,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407267316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:31,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:31,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-16 05:51:31,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136696444] [2021-12-16 05:51:31,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:31,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:51:31,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:31,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:51:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:51:31,568 INFO L87 Difference]: Start difference. First operand 1015 states and 1327 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:33,724 INFO L93 Difference]: Finished difference Result 2425 states and 3160 transitions. [2021-12-16 05:51:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-16 05:51:33,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-16 05:51:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:33,728 INFO L225 Difference]: With dead ends: 2425 [2021-12-16 05:51:33,728 INFO L226 Difference]: Without dead ends: 2425 [2021-12-16 05:51:33,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=534, Invalid=1818, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 05:51:33,729 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 1811 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1817 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:33,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1817 Valid, 1877 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 05:51:33,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-12-16 05:51:33,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1247. [2021-12-16 05:51:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1139 states have (on average 1.3476733977172959) internal successors, (1535), 1187 states have internal predecessors, (1535), 35 states have call successors, (35), 18 states have call predecessors, (35), 36 states have return successors, (70), 41 states have call predecessors, (70), 35 states have call successors, (70) [2021-12-16 05:51:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1640 transitions. [2021-12-16 05:51:33,751 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1640 transitions. Word has length 53 [2021-12-16 05:51:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:33,751 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 1640 transitions. [2021-12-16 05:51:33,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1640 transitions. [2021-12-16 05:51:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 05:51:33,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:33,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:33,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-16 05:51:33,753 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:33,753 INFO L85 PathProgramCache]: Analyzing trace with hash -689191822, now seen corresponding path program 1 times [2021-12-16 05:51:33,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:33,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270282021] [2021-12-16 05:51:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:33,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:34,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:34,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:34,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270282021] [2021-12-16 05:51:34,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270282021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:34,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:34,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 05:51:34,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095494739] [2021-12-16 05:51:34,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:34,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 05:51:34,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:34,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 05:51:34,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:51:34,245 INFO L87 Difference]: Start difference. First operand 1247 states and 1640 transitions. Second operand has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:35,552 INFO L93 Difference]: Finished difference Result 2293 states and 3000 transitions. [2021-12-16 05:51:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 05:51:35,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-16 05:51:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:35,564 INFO L225 Difference]: With dead ends: 2293 [2021-12-16 05:51:35,564 INFO L226 Difference]: Without dead ends: 2293 [2021-12-16 05:51:35,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 05:51:35,565 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 1817 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1819 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:35,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1819 Valid, 1609 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 05:51:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-12-16 05:51:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1289. [2021-12-16 05:51:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1177 states have (on average 1.3483432455395072) internal successors, (1587), 1226 states have internal predecessors, (1587), 37 states have call successors, (37), 19 states have call predecessors, (37), 38 states have return successors, (74), 43 states have call predecessors, (74), 37 states have call successors, (74) [2021-12-16 05:51:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1698 transitions. [2021-12-16 05:51:35,590 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1698 transitions. Word has length 53 [2021-12-16 05:51:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:35,590 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 1698 transitions. [2021-12-16 05:51:35,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:35,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1698 transitions. [2021-12-16 05:51:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 05:51:35,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:35,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:35,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-16 05:51:35,594 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:35,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:35,594 INFO L85 PathProgramCache]: Analyzing trace with hash -687344781, now seen corresponding path program 1 times [2021-12-16 05:51:35,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:35,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844532482] [2021-12-16 05:51:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:35,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:35,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:35,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:35,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844532482] [2021-12-16 05:51:35,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844532482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:35,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:35,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 05:51:35,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417512828] [2021-12-16 05:51:35,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:35,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:51:35,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:35,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:51:35,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:51:35,853 INFO L87 Difference]: Start difference. First operand 1289 states and 1698 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:36,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:36,356 INFO L93 Difference]: Finished difference Result 2095 states and 2756 transitions. [2021-12-16 05:51:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 05:51:36,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-16 05:51:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:36,360 INFO L225 Difference]: With dead ends: 2095 [2021-12-16 05:51:36,361 INFO L226 Difference]: Without dead ends: 2095 [2021-12-16 05:51:36,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:51:36,361 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 774 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:36,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 1186 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:51:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-12-16 05:51:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1612. [2021-12-16 05:51:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1464 states have (on average 1.33948087431694) internal successors, (1961), 1522 states have internal predecessors, (1961), 55 states have call successors, (55), 28 states have call predecessors, (55), 56 states have return successors, (110), 61 states have call predecessors, (110), 55 states have call successors, (110) [2021-12-16 05:51:36,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2126 transitions. [2021-12-16 05:51:36,387 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2126 transitions. Word has length 53 [2021-12-16 05:51:36,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:36,388 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2126 transitions. [2021-12-16 05:51:36,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:36,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2126 transitions. [2021-12-16 05:51:36,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 05:51:36,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:36,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:36,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-16 05:51:36,389 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:36,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:36,390 INFO L85 PathProgramCache]: Analyzing trace with hash -687344780, now seen corresponding path program 1 times [2021-12-16 05:51:36,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:36,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316943032] [2021-12-16 05:51:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:36,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:36,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:36,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:36,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316943032] [2021-12-16 05:51:36,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316943032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:36,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:36,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 05:51:36,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724661000] [2021-12-16 05:51:36,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:36,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 05:51:36,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:36,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 05:51:36,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:51:36,680 INFO L87 Difference]: Start difference. First operand 1612 states and 2126 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:37,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:37,249 INFO L93 Difference]: Finished difference Result 2022 states and 2658 transitions. [2021-12-16 05:51:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:51:37,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-16 05:51:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:37,259 INFO L225 Difference]: With dead ends: 2022 [2021-12-16 05:51:37,259 INFO L226 Difference]: Without dead ends: 2022 [2021-12-16 05:51:37,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:51:37,260 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 621 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:37,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 1140 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 05:51:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-12-16 05:51:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1395. [2021-12-16 05:51:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1271 states have (on average 1.3446105428796225) internal successors, (1709), 1323 states have internal predecessors, (1709), 43 states have call successors, (43), 22 states have call predecessors, (43), 44 states have return successors, (86), 49 states have call predecessors, (86), 43 states have call successors, (86) [2021-12-16 05:51:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 1838 transitions. [2021-12-16 05:51:37,279 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 1838 transitions. Word has length 53 [2021-12-16 05:51:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:37,279 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 1838 transitions. [2021-12-16 05:51:37,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 1838 transitions. [2021-12-16 05:51:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 05:51:37,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:37,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:37,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-16 05:51:37,281 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:37,281 INFO L85 PathProgramCache]: Analyzing trace with hash -510671054, now seen corresponding path program 1 times [2021-12-16 05:51:37,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:37,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272170079] [2021-12-16 05:51:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:37,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:37,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:37,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:37,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272170079] [2021-12-16 05:51:37,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272170079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:37,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:37,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 05:51:37,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598664881] [2021-12-16 05:51:37,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:37,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 05:51:37,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 05:51:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:51:37,487 INFO L87 Difference]: Start difference. First operand 1395 states and 1838 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:37,892 INFO L93 Difference]: Finished difference Result 2059 states and 2698 transitions. [2021-12-16 05:51:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:51:37,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-16 05:51:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:37,895 INFO L225 Difference]: With dead ends: 2059 [2021-12-16 05:51:37,895 INFO L226 Difference]: Without dead ends: 2059 [2021-12-16 05:51:37,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:51:37,896 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 718 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:37,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 1511 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:51:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-12-16 05:51:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1395. [2021-12-16 05:51:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1271 states have (on average 1.3391030684500393) internal successors, (1702), 1323 states have internal predecessors, (1702), 43 states have call successors, (43), 22 states have call predecessors, (43), 44 states have return successors, (86), 49 states have call predecessors, (86), 43 states have call successors, (86) [2021-12-16 05:51:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 1831 transitions. [2021-12-16 05:51:37,918 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 1831 transitions. Word has length 53 [2021-12-16 05:51:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:37,918 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 1831 transitions. [2021-12-16 05:51:37,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 1831 transitions. [2021-12-16 05:51:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 05:51:37,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:37,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:37,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-16 05:51:37,920 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash -746702023, now seen corresponding path program 1 times [2021-12-16 05:51:37,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:37,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832085541] [2021-12-16 05:51:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:37,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:38,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:38,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:38,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832085541] [2021-12-16 05:51:38,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832085541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:38,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:38,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-16 05:51:38,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879417310] [2021-12-16 05:51:38,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:38,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 05:51:38,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:38,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 05:51:38,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:51:38,265 INFO L87 Difference]: Start difference. First operand 1395 states and 1831 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:39,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:39,340 INFO L93 Difference]: Finished difference Result 2458 states and 3170 transitions. [2021-12-16 05:51:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 05:51:39,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-16 05:51:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:39,344 INFO L225 Difference]: With dead ends: 2458 [2021-12-16 05:51:39,344 INFO L226 Difference]: Without dead ends: 2458 [2021-12-16 05:51:39,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:51:39,345 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 1106 mSDsluCounter, 2488 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 2822 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:39,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 2822 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 05:51:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-12-16 05:51:39,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1369. [2021-12-16 05:51:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1245 states have (on average 1.342168674698795) internal successors, (1671), 1297 states have internal predecessors, (1671), 43 states have call successors, (43), 22 states have call predecessors, (43), 44 states have return successors, (86), 49 states have call predecessors, (86), 43 states have call successors, (86) [2021-12-16 05:51:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1800 transitions. [2021-12-16 05:51:39,372 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1800 transitions. Word has length 53 [2021-12-16 05:51:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:39,372 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 1800 transitions. [2021-12-16 05:51:39,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:39,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1800 transitions. [2021-12-16 05:51:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-16 05:51:39,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:39,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:39,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-16 05:51:39,374 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:39,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash 109888723, now seen corresponding path program 1 times [2021-12-16 05:51:39,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:39,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174585543] [2021-12-16 05:51:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:39,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:39,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:39,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:39,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174585543] [2021-12-16 05:51:39,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174585543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:39,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:39,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 05:51:39,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302346242] [2021-12-16 05:51:39,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:39,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:51:39,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:39,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:51:39,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:51:39,654 INFO L87 Difference]: Start difference. First operand 1369 states and 1800 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:40,005 INFO L93 Difference]: Finished difference Result 1781 states and 2335 transitions. [2021-12-16 05:51:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:51:40,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-16 05:51:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:40,008 INFO L225 Difference]: With dead ends: 1781 [2021-12-16 05:51:40,008 INFO L226 Difference]: Without dead ends: 1781 [2021-12-16 05:51:40,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-12-16 05:51:40,009 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 1130 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:40,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 951 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-12-16 05:51:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1470. [2021-12-16 05:51:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1338 states have (on average 1.345291479820628) internal successors, (1800), 1392 states have internal predecessors, (1800), 47 states have call successors, (47), 24 states have call predecessors, (47), 48 states have return successors, (94), 53 states have call predecessors, (94), 47 states have call successors, (94) [2021-12-16 05:51:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 1941 transitions. [2021-12-16 05:51:40,028 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 1941 transitions. Word has length 54 [2021-12-16 05:51:40,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:40,028 INFO L470 AbstractCegarLoop]: Abstraction has 1470 states and 1941 transitions. [2021-12-16 05:51:40,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:40,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 1941 transitions. [2021-12-16 05:51:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-16 05:51:40,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:40,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:40,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-16 05:51:40,030 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash 167147025, now seen corresponding path program 1 times [2021-12-16 05:51:40,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:40,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215102309] [2021-12-16 05:51:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:40,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:40,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:40,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:40,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215102309] [2021-12-16 05:51:40,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215102309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:40,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:40,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 05:51:40,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729928587] [2021-12-16 05:51:40,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:40,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 05:51:40,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:40,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 05:51:40,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:51:40,222 INFO L87 Difference]: Start difference. First operand 1470 states and 1941 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:40,510 INFO L93 Difference]: Finished difference Result 2097 states and 2760 transitions. [2021-12-16 05:51:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 05:51:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-16 05:51:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:40,514 INFO L225 Difference]: With dead ends: 2097 [2021-12-16 05:51:40,514 INFO L226 Difference]: Without dead ends: 2097 [2021-12-16 05:51:40,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:51:40,515 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 963 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:40,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 1029 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-12-16 05:51:40,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1776. [2021-12-16 05:51:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1612 states have (on average 1.3424317617866004) internal successors, (2164), 1674 states have internal predecessors, (2164), 63 states have call successors, (63), 32 states have call predecessors, (63), 64 states have return successors, (126), 69 states have call predecessors, (126), 63 states have call successors, (126) [2021-12-16 05:51:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 2353 transitions. [2021-12-16 05:51:40,553 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 2353 transitions. Word has length 54 [2021-12-16 05:51:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:40,553 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 2353 transitions. [2021-12-16 05:51:40,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:40,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 2353 transitions. [2021-12-16 05:51:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-16 05:51:40,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:40,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:40,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-16 05:51:40,555 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:40,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1735229320, now seen corresponding path program 1 times [2021-12-16 05:51:40,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:40,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714138425] [2021-12-16 05:51:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:40,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:40,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:40,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:40,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714138425] [2021-12-16 05:51:40,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714138425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:40,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:40,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 05:51:40,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737524252] [2021-12-16 05:51:40,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:40,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 05:51:40,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:40,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 05:51:40,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:51:40,719 INFO L87 Difference]: Start difference. First operand 1776 states and 2353 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:41,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:41,046 INFO L93 Difference]: Finished difference Result 2175 states and 2868 transitions. [2021-12-16 05:51:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 05:51:41,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-16 05:51:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:41,049 INFO L225 Difference]: With dead ends: 2175 [2021-12-16 05:51:41,049 INFO L226 Difference]: Without dead ends: 2175 [2021-12-16 05:51:41,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:51:41,050 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 295 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:41,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1214 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:41,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-12-16 05:51:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1552. [2021-12-16 05:51:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1412 states have (on average 1.344900849858357) internal successors, (1899), 1468 states have internal predecessors, (1899), 51 states have call successors, (51), 26 states have call predecessors, (51), 52 states have return successors, (102), 57 states have call predecessors, (102), 51 states have call successors, (102) [2021-12-16 05:51:41,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2052 transitions. [2021-12-16 05:51:41,074 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2052 transitions. Word has length 54 [2021-12-16 05:51:41,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:41,074 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 2052 transitions. [2021-12-16 05:51:41,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2052 transitions. [2021-12-16 05:51:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 05:51:41,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:41,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:41,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-16 05:51:41,075 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:41,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:41,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1769661897, now seen corresponding path program 1 times [2021-12-16 05:51:41,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:41,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101604737] [2021-12-16 05:51:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:41,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:41,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:41,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:41,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101604737] [2021-12-16 05:51:41,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101604737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:41,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:41,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-16 05:51:41,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96743723] [2021-12-16 05:51:41,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:41,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 05:51:41,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:41,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 05:51:41,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:51:41,513 INFO L87 Difference]: Start difference. First operand 1552 states and 2052 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:43,121 INFO L93 Difference]: Finished difference Result 2849 states and 3774 transitions. [2021-12-16 05:51:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 05:51:43,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-16 05:51:43,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:43,125 INFO L225 Difference]: With dead ends: 2849 [2021-12-16 05:51:43,125 INFO L226 Difference]: Without dead ends: 2849 [2021-12-16 05:51:43,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=432, Invalid=1460, Unknown=0, NotChecked=0, Total=1892 [2021-12-16 05:51:43,126 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 2683 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2685 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:43,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2685 Valid, 1357 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 05:51:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-12-16 05:51:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 1564. [2021-12-16 05:51:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1424 states have (on average 1.3441011235955056) internal successors, (1914), 1480 states have internal predecessors, (1914), 51 states have call successors, (51), 26 states have call predecessors, (51), 52 states have return successors, (102), 57 states have call predecessors, (102), 51 states have call successors, (102) [2021-12-16 05:51:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2067 transitions. [2021-12-16 05:51:43,152 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2067 transitions. Word has length 56 [2021-12-16 05:51:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:43,153 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 2067 transitions. [2021-12-16 05:51:43,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2067 transitions. [2021-12-16 05:51:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 05:51:43,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:43,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:43,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-16 05:51:43,154 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1715958773, now seen corresponding path program 1 times [2021-12-16 05:51:43,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:43,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854214357] [2021-12-16 05:51:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:43,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:43,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:43,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854214357] [2021-12-16 05:51:43,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854214357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:43,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:43,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 05:51:43,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102717081] [2021-12-16 05:51:43,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:43,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 05:51:43,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 05:51:43,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:51:43,338 INFO L87 Difference]: Start difference. First operand 1564 states and 2067 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:43,712 INFO L93 Difference]: Finished difference Result 2193 states and 2889 transitions. [2021-12-16 05:51:43,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 05:51:43,712 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-16 05:51:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:43,714 INFO L225 Difference]: With dead ends: 2193 [2021-12-16 05:51:43,714 INFO L226 Difference]: Without dead ends: 2193 [2021-12-16 05:51:43,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-12-16 05:51:43,715 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 935 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:43,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 811 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:51:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2021-12-16 05:51:43,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1870. [2021-12-16 05:51:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1698 states have (on average 1.3415783274440518) internal successors, (2278), 1762 states have internal predecessors, (2278), 67 states have call successors, (67), 34 states have call predecessors, (67), 68 states have return successors, (134), 73 states have call predecessors, (134), 67 states have call successors, (134) [2021-12-16 05:51:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2479 transitions. [2021-12-16 05:51:43,739 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2479 transitions. Word has length 56 [2021-12-16 05:51:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:43,739 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2479 transitions. [2021-12-16 05:51:43,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2479 transitions. [2021-12-16 05:51:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 05:51:43,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:43,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:43,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-12-16 05:51:43,741 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:43,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:43,741 INFO L85 PathProgramCache]: Analyzing trace with hash -773838198, now seen corresponding path program 1 times [2021-12-16 05:51:43,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:43,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129428411] [2021-12-16 05:51:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:43,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:43,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:43,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 05:51:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:51:43,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:43,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129428411] [2021-12-16 05:51:43,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129428411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:43,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:43,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:51:43,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327437621] [2021-12-16 05:51:43,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:43,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:51:43,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:43,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:51:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:51:43,795 INFO L87 Difference]: Start difference. First operand 1870 states and 2479 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 05:51:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:43,824 INFO L93 Difference]: Finished difference Result 2215 states and 2909 transitions. [2021-12-16 05:51:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:51:43,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2021-12-16 05:51:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:43,827 INFO L225 Difference]: With dead ends: 2215 [2021-12-16 05:51:43,827 INFO L226 Difference]: Without dead ends: 2215 [2021-12-16 05:51:43,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:51:43,828 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 264 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:43,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 431 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:51:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-12-16 05:51:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 1869. [2021-12-16 05:51:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1698 states have (on average 1.3309776207302708) internal successors, (2260), 1761 states have internal predecessors, (2260), 67 states have call successors, (67), 34 states have call predecessors, (67), 68 states have return successors, (134), 73 states have call predecessors, (134), 67 states have call successors, (134) [2021-12-16 05:51:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2461 transitions. [2021-12-16 05:51:43,853 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2461 transitions. Word has length 57 [2021-12-16 05:51:43,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:43,853 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2461 transitions. [2021-12-16 05:51:43,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 05:51:43,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2461 transitions. [2021-12-16 05:51:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 05:51:43,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:43,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:43,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-12-16 05:51:43,855 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:43,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:43,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1106607972, now seen corresponding path program 1 times [2021-12-16 05:51:43,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:43,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445896577] [2021-12-16 05:51:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:43,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:44,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:51:44,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:44,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445896577] [2021-12-16 05:51:44,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445896577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:44,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:44,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 05:51:44,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229558093] [2021-12-16 05:51:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:44,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:51:44,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:51:44,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:51:44,123 INFO L87 Difference]: Start difference. First operand 1869 states and 2461 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:44,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:44,874 INFO L93 Difference]: Finished difference Result 2588 states and 3363 transitions. [2021-12-16 05:51:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 05:51:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-16 05:51:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:44,877 INFO L225 Difference]: With dead ends: 2588 [2021-12-16 05:51:44,877 INFO L226 Difference]: Without dead ends: 2588 [2021-12-16 05:51:44,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-12-16 05:51:44,879 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 925 mSDsluCounter, 1752 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:44,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 2047 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 05:51:44,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-12-16 05:51:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1555. [2021-12-16 05:51:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1416 states have (on average 1.3347457627118644) internal successors, (1890), 1471 states have internal predecessors, (1890), 51 states have call successors, (51), 26 states have call predecessors, (51), 52 states have return successors, (102), 57 states have call predecessors, (102), 51 states have call successors, (102) [2021-12-16 05:51:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2043 transitions. [2021-12-16 05:51:44,900 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2043 transitions. Word has length 56 [2021-12-16 05:51:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:44,900 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 2043 transitions. [2021-12-16 05:51:44,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 05:51:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2043 transitions. [2021-12-16 05:51:44,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 05:51:44,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:44,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:51:44,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-12-16 05:51:44,902 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:44,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:44,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1780819851, now seen corresponding path program 1 times [2021-12-16 05:51:44,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:44,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736238862] [2021-12-16 05:51:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:44,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:45,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:45,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 05:51:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:51:45,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:45,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736238862] [2021-12-16 05:51:45,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736238862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:51:45,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:51:45,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-16 05:51:45,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664936909] [2021-12-16 05:51:45,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:51:45,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 05:51:45,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:51:45,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 05:51:45,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-16 05:51:45,340 INFO L87 Difference]: Start difference. First operand 1555 states and 2043 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:51:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:51:46,751 INFO L93 Difference]: Finished difference Result 3523 states and 4688 transitions. [2021-12-16 05:51:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-16 05:51:46,751 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2021-12-16 05:51:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:51:46,757 INFO L225 Difference]: With dead ends: 3523 [2021-12-16 05:51:46,757 INFO L226 Difference]: Without dead ends: 3521 [2021-12-16 05:51:46,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 05:51:46,758 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 1824 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1824 SdHoareTripleChecker+Valid, 2423 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:51:46,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1824 Valid, 2423 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 05:51:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2021-12-16 05:51:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 1657. [2021-12-16 05:51:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1506 states have (on average 1.3280212483399734) internal successors, (2000), 1564 states have internal predecessors, (2000), 57 states have call successors, (57), 29 states have call predecessors, (57), 58 states have return successors, (114), 63 states have call predecessors, (114), 57 states have call successors, (114) [2021-12-16 05:51:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2171 transitions. [2021-12-16 05:51:46,787 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2171 transitions. Word has length 58 [2021-12-16 05:51:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:51:46,787 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 2171 transitions. [2021-12-16 05:51:46,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 05:51:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2171 transitions. [2021-12-16 05:51:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-16 05:51:46,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:51:46,788 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 05:51:46,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-12-16 05:51:46,788 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-16 05:51:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:51:46,789 INFO L85 PathProgramCache]: Analyzing trace with hash 765562808, now seen corresponding path program 1 times [2021-12-16 05:51:46,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:51:46,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943448614] [2021-12-16 05:51:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:46,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:51:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:47,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 05:51:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:47,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 05:51:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:51:47,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:51:47,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943448614] [2021-12-16 05:51:47,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943448614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:51:47,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777505646] [2021-12-16 05:51:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:51:47,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:51:47,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:51:47,220 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) [2021-12-16 05:51:47,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:51:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:51:47,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-16 05:51:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:51:47,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 05:51:47,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:51:47,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28