./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0214.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 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-0214.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 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:49:10,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:49:10,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:49:10,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:49:10,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:49:10,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:49:10,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:49:10,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:49:10,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:49:10,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:49:10,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:49:10,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:49:10,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:49:10,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:49:10,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:49:10,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:49:10,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:49:10,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:49:10,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:49:10,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:49:10,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:49:10,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:49:10,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:49:10,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:49:10,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:49:10,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:49:10,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:49:10,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:49:10,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:49:10,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:49:10,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:49:10,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:49:10,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:49:10,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:49:10,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:49:10,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:49:10,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:49:10,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:49:10,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:49:10,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:49:10,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:49:10,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:49:10,511 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:49:10,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:49:10,512 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:49:10,512 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:49:10,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:49:10,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:49:10,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:49:10,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:49:10,514 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:49:10,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:49:10,515 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:49:10,515 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:49:10,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:49:10,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:49:10,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:49:10,516 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:49:10,516 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:49:10,516 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:49:10,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:49:10,517 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:49:10,517 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:49:10,517 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:49:10,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:49:10,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:49:10,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:49:10,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:49:10,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:49:10,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:49:10,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:49:10,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:49:10,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 [2021-12-28 05:49:10,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:49:10,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:49:10,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:49:10,786 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:49:10,787 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:49:10,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0214.i [2021-12-28 05:49:10,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80f44e3ee/c38491c695504e6fb630f4c0d4c8bbb7/FLAG1cfe6e002 [2021-12-28 05:49:11,270 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:49:11,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0214.i [2021-12-28 05:49:11,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80f44e3ee/c38491c695504e6fb630f4c0d4c8bbb7/FLAG1cfe6e002 [2021-12-28 05:49:11,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80f44e3ee/c38491c695504e6fb630f4c0d4c8bbb7 [2021-12-28 05:49:11,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:49:11,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:49:11,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:49:11,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:49:11,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:49:11,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68530190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11, skipping insertion in model container [2021-12-28 05:49:11,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:49:11,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:49:11,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:49:11,629 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:49:11,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:49:11,701 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:49:11,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11 WrapperNode [2021-12-28 05:49:11,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:49:11,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:49:11,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:49:11,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:49:11,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,762 INFO L137 Inliner]: procedures = 181, calls = 42, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 181 [2021-12-28 05:49:11,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:49:11,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:49:11,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:49:11,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:49:11,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:49:11,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:49:11,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:49:11,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:49:11,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11" (1/1) ... [2021-12-28 05:49:11,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:49:11,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:11,846 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) [2021-12-28 05:49:11,853 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 [2021-12-28 05:49:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-12-28 05:49:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-12-28 05:49:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 05:49:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 05:49:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 05:49:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 05:49:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 05:49:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:49:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 05:49:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 05:49:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:49:11,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:49:12,015 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:49:12,016 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:49:12,358 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:49:12,363 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:49:12,363 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-28 05:49:12,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:49:12 BoogieIcfgContainer [2021-12-28 05:49:12,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:49:12,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:49:12,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:49:12,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:49:12,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:49:11" (1/3) ... [2021-12-28 05:49:12,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@205dbb28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:49:12, skipping insertion in model container [2021-12-28 05:49:12,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:11" (2/3) ... [2021-12-28 05:49:12,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@205dbb28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:49:12, skipping insertion in model container [2021-12-28 05:49:12,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:49:12" (3/3) ... [2021-12-28 05:49:12,370 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0214.i [2021-12-28 05:49:12,374 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:49:12,374 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2021-12-28 05:49:12,409 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:49:12,414 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 [2021-12-28 05:49:12,414 INFO L340 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2021-12-28 05:49:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 85 states have (on average 1.9294117647058824) internal successors, (164), 142 states have internal predecessors, (164), 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) [2021-12-28 05:49:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:49:12,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:12,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:49:12,430 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:12,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:12,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1073379816, now seen corresponding path program 1 times [2021-12-28 05:49:12,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:12,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129065217] [2021-12-28 05:49:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:12,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:12,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:12,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129065217] [2021-12-28 05:49:12,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129065217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:12,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:12,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:49:12,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611424615] [2021-12-28 05:49:12,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:12,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 05:49:12,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:12,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 05:49:12,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 05:49:12,567 INFO L87 Difference]: Start difference. First operand has 146 states, 85 states have (on average 1.9294117647058824) internal successors, (164), 142 states have internal predecessors, (164), 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) [2021-12-28 05:49:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:12,589 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2021-12-28 05:49:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 05:49:12,591 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 [2021-12-28 05:49:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:12,601 INFO L225 Difference]: With dead ends: 146 [2021-12-28 05:49:12,601 INFO L226 Difference]: Without dead ends: 144 [2021-12-28 05:49:12,603 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 [2021-12-28 05:49:12,606 INFO L933 BasicCegarLoop]: 163 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, 163 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 [2021-12-28 05:49:12,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-28 05:49:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-12-28 05:49:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 84 states have (on average 1.869047619047619) internal successors, (157), 140 states have internal predecessors, (157), 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) [2021-12-28 05:49:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2021-12-28 05:49:12,644 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 6 [2021-12-28 05:49:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:12,645 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2021-12-28 05:49:12,645 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) [2021-12-28 05:49:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2021-12-28 05:49:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:49:12,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:12,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:12,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 05:49:12,646 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:12,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:12,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1280367911, now seen corresponding path program 1 times [2021-12-28 05:49:12,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:12,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585336732] [2021-12-28 05:49:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:12,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:12,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:12,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585336732] [2021-12-28 05:49:12,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585336732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:12,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:12,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-28 05:49:12,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852716371] [2021-12-28 05:49:12,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:12,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:49:12,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:12,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:49:12,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:49:12,737 INFO L87 Difference]: Start difference. First operand 144 states and 161 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) [2021-12-28 05:49:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:12,913 INFO L93 Difference]: Finished difference Result 279 states and 312 transitions. [2021-12-28 05:49:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:49:12,913 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 [2021-12-28 05:49:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:12,915 INFO L225 Difference]: With dead ends: 279 [2021-12-28 05:49:12,916 INFO L226 Difference]: Without dead ends: 279 [2021-12-28 05:49:12,916 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 [2021-12-28 05:49:12,917 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 142 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:12,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 209 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-28 05:49:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 193. [2021-12-28 05:49:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 130 states have (on average 1.8461538461538463) internal successors, (240), 186 states have internal predecessors, (240), 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) [2021-12-28 05:49:12,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 248 transitions. [2021-12-28 05:49:12,930 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 248 transitions. Word has length 7 [2021-12-28 05:49:12,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:12,930 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 248 transitions. [2021-12-28 05:49:12,930 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) [2021-12-28 05:49:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 248 transitions. [2021-12-28 05:49:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:49:12,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:12,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:12,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 05:49:12,931 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:12,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1280367910, now seen corresponding path program 1 times [2021-12-28 05:49:12,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:12,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391875044] [2021-12-28 05:49:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:12,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:13,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:13,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391875044] [2021-12-28 05:49:13,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391875044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:13,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:13,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:49:13,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498823090] [2021-12-28 05:49:13,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:13,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:13,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:13,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:13,007 INFO L87 Difference]: Start difference. First operand 193 states and 248 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) [2021-12-28 05:49:13,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:13,144 INFO L93 Difference]: Finished difference Result 342 states and 424 transitions. [2021-12-28 05:49:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:13,144 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 [2021-12-28 05:49:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:13,146 INFO L225 Difference]: With dead ends: 342 [2021-12-28 05:49:13,146 INFO L226 Difference]: Without dead ends: 342 [2021-12-28 05:49:13,147 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 [2021-12-28 05:49:13,152 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 145 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:13,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 350 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:13,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-28 05:49:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 270. [2021-12-28 05:49:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 201 states have (on average 1.8059701492537314) internal successors, (363), 259 states have internal predecessors, (363), 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) [2021-12-28 05:49:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 379 transitions. [2021-12-28 05:49:13,177 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 379 transitions. Word has length 7 [2021-12-28 05:49:13,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:13,178 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 379 transitions. [2021-12-28 05:49:13,178 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) [2021-12-28 05:49:13,178 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 379 transitions. [2021-12-28 05:49:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:49:13,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:13,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:13,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 05:49:13,179 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1280367972, now seen corresponding path program 1 times [2021-12-28 05:49:13,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:13,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051494209] [2021-12-28 05:49:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:13,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:13,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:13,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051494209] [2021-12-28 05:49:13,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051494209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:13,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:13,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:49:13,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312036004] [2021-12-28 05:49:13,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:13,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:13,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:13,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:13,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:13,248 INFO L87 Difference]: Start difference. First operand 270 states and 379 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) [2021-12-28 05:49:13,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:13,358 INFO L93 Difference]: Finished difference Result 341 states and 422 transitions. [2021-12-28 05:49:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:13,358 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 [2021-12-28 05:49:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:13,359 INFO L225 Difference]: With dead ends: 341 [2021-12-28 05:49:13,360 INFO L226 Difference]: Without dead ends: 341 [2021-12-28 05:49:13,360 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 [2021-12-28 05:49:13,360 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 127 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:13,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 364 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-28 05:49:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 270. [2021-12-28 05:49:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 201 states have (on average 1.8059701492537314) internal successors, (363), 259 states have internal predecessors, (363), 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) [2021-12-28 05:49:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 379 transitions. [2021-12-28 05:49:13,370 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 379 transitions. Word has length 7 [2021-12-28 05:49:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:13,370 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 379 transitions. [2021-12-28 05:49:13,370 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) [2021-12-28 05:49:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 379 transitions. [2021-12-28 05:49:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:49:13,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:13,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:13,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 05:49:13,372 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash 164318064, now seen corresponding path program 1 times [2021-12-28 05:49:13,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694071008] [2021-12-28 05:49:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:13,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:13,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:13,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694071008] [2021-12-28 05:49:13,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694071008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:13,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:13,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:13,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857533688] [2021-12-28 05:49:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:13,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:13,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:13,453 INFO L87 Difference]: Start difference. First operand 270 states and 379 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) [2021-12-28 05:49:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:13,566 INFO L93 Difference]: Finished difference Result 391 states and 519 transitions. [2021-12-28 05:49:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:13,567 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 [2021-12-28 05:49:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:13,569 INFO L225 Difference]: With dead ends: 391 [2021-12-28 05:49:13,569 INFO L226 Difference]: Without dead ends: 391 [2021-12-28 05:49:13,570 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 [2021-12-28 05:49:13,570 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 123 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:13,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 680 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:13,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-12-28 05:49:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 312. [2021-12-28 05:49:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 240 states have (on average 1.7916666666666667) internal successors, (430), 299 states have internal predecessors, (430), 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) [2021-12-28 05:49:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 450 transitions. [2021-12-28 05:49:13,577 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 450 transitions. Word has length 10 [2021-12-28 05:49:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:13,578 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 450 transitions. [2021-12-28 05:49:13,578 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) [2021-12-28 05:49:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 450 transitions. [2021-12-28 05:49:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:49:13,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:13,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:13,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 05:49:13,579 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:13,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:13,579 INFO L85 PathProgramCache]: Analyzing trace with hash 162471022, now seen corresponding path program 1 times [2021-12-28 05:49:13,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:13,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535255545] [2021-12-28 05:49:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:13,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:13,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:13,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535255545] [2021-12-28 05:49:13,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535255545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:13,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:13,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:13,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92073090] [2021-12-28 05:49:13,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:13,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:13,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:13,662 INFO L87 Difference]: Start difference. First operand 312 states and 450 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) [2021-12-28 05:49:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:13,814 INFO L93 Difference]: Finished difference Result 381 states and 508 transitions. [2021-12-28 05:49:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:13,814 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 [2021-12-28 05:49:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:13,816 INFO L225 Difference]: With dead ends: 381 [2021-12-28 05:49:13,816 INFO L226 Difference]: Without dead ends: 381 [2021-12-28 05:49:13,816 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 [2021-12-28 05:49:13,817 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 109 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:13,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 689 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-12-28 05:49:13,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 311. [2021-12-28 05:49:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 239 states have (on average 1.794979079497908) internal successors, (429), 298 states have internal predecessors, (429), 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) [2021-12-28 05:49:13,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 449 transitions. [2021-12-28 05:49:13,823 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 449 transitions. Word has length 10 [2021-12-28 05:49:13,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:13,824 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 449 transitions. [2021-12-28 05:49:13,824 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) [2021-12-28 05:49:13,824 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 449 transitions. [2021-12-28 05:49:13,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:49:13,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:13,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:13,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 05:49:13,825 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:13,825 INFO L85 PathProgramCache]: Analyzing trace with hash 798891393, now seen corresponding path program 1 times [2021-12-28 05:49:13,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:13,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580628498] [2021-12-28 05:49:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:13,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:13,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:13,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580628498] [2021-12-28 05:49:13,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580628498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:13,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:13,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:49:13,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292706398] [2021-12-28 05:49:13,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:13,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:49:13,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:13,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:49:13,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:49:13,843 INFO L87 Difference]: Start difference. First operand 311 states and 449 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) [2021-12-28 05:49:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:13,900 INFO L93 Difference]: Finished difference Result 370 states and 506 transitions. [2021-12-28 05:49:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:49:13,900 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 [2021-12-28 05:49:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:13,902 INFO L225 Difference]: With dead ends: 370 [2021-12-28 05:49:13,902 INFO L226 Difference]: Without dead ends: 363 [2021-12-28 05:49:13,902 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 [2021-12-28 05:49:13,902 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 74 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:13,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 237 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-28 05:49:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 308. [2021-12-28 05:49:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.7966101694915255) internal successors, (424), 295 states have internal predecessors, (424), 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) [2021-12-28 05:49:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 444 transitions. [2021-12-28 05:49:13,909 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 444 transitions. Word has length 11 [2021-12-28 05:49:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:13,909 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 444 transitions. [2021-12-28 05:49:13,909 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) [2021-12-28 05:49:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 444 transitions. [2021-12-28 05:49:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:49:13,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:13,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:13,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 05:49:13,910 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:13,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1916999928, now seen corresponding path program 1 times [2021-12-28 05:49:13,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:13,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415359471] [2021-12-28 05:49:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:13,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:13,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:13,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:13,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415359471] [2021-12-28 05:49:13,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415359471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:13,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:13,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:13,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232564252] [2021-12-28 05:49:13,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:13,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:13,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:13,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:13,952 INFO L87 Difference]: Start difference. First operand 308 states and 444 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-28 05:49:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:14,106 INFO L93 Difference]: Finished difference Result 439 states and 552 transitions. [2021-12-28 05:49:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 13 [2021-12-28 05:49:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:14,108 INFO L225 Difference]: With dead ends: 439 [2021-12-28 05:49:14,109 INFO L226 Difference]: Without dead ends: 439 [2021-12-28 05:49:14,109 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 [2021-12-28 05:49:14,110 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 267 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:14,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 353 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-28 05:49:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 308. [2021-12-28 05:49:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.771186440677966) internal successors, (418), 295 states have internal predecessors, (418), 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) [2021-12-28 05:49:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 438 transitions. [2021-12-28 05:49:14,120 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 438 transitions. Word has length 13 [2021-12-28 05:49:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:14,120 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 438 transitions. [2021-12-28 05:49:14,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-28 05:49:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 438 transitions. [2021-12-28 05:49:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:49:14,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:14,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:14,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 05:49:14,123 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1916999929, now seen corresponding path program 1 times [2021-12-28 05:49:14,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:14,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598266267] [2021-12-28 05:49:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:14,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:14,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:14,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:14,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598266267] [2021-12-28 05:49:14,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598266267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:14,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:14,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:14,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769388817] [2021-12-28 05:49:14,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:14,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:14,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:14,198 INFO L87 Difference]: Start difference. First operand 308 states and 438 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-28 05:49:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:14,367 INFO L93 Difference]: Finished difference Result 378 states and 484 transitions. [2021-12-28 05:49:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:49:14,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2021-12-28 05:49:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:14,369 INFO L225 Difference]: With dead ends: 378 [2021-12-28 05:49:14,369 INFO L226 Difference]: Without dead ends: 378 [2021-12-28 05:49:14,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:14,370 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 118 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:14,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 660 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:14,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-28 05:49:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 318. [2021-12-28 05:49:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 243 states have (on average 1.7530864197530864) internal successors, (426), 303 states have internal predecessors, (426), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-28 05:49:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 452 transitions. [2021-12-28 05:49:14,377 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 452 transitions. Word has length 13 [2021-12-28 05:49:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:14,377 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 452 transitions. [2021-12-28 05:49:14,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-28 05:49:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 452 transitions. [2021-12-28 05:49:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:49:14,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:14,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:14,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 05:49:14,378 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:14,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1917923450, now seen corresponding path program 1 times [2021-12-28 05:49:14,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:14,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838176005] [2021-12-28 05:49:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:14,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:14,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:14,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:14,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838176005] [2021-12-28 05:49:14,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838176005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:14,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:14,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:14,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421465220] [2021-12-28 05:49:14,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:14,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:14,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:14,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:14,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:14,454 INFO L87 Difference]: Start difference. First operand 318 states and 452 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-28 05:49:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:14,620 INFO L93 Difference]: Finished difference Result 377 states and 482 transitions. [2021-12-28 05:49:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:49:14,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2021-12-28 05:49:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:14,622 INFO L225 Difference]: With dead ends: 377 [2021-12-28 05:49:14,622 INFO L226 Difference]: Without dead ends: 377 [2021-12-28 05:49:14,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:14,622 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 113 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:14,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 682 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-28 05:49:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 312. [2021-12-28 05:49:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 240 states have (on average 1.7625) internal successors, (423), 297 states have internal predecessors, (423), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-28 05:49:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 443 transitions. [2021-12-28 05:49:14,629 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 443 transitions. Word has length 13 [2021-12-28 05:49:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:14,629 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 443 transitions. [2021-12-28 05:49:14,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-28 05:49:14,629 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 443 transitions. [2021-12-28 05:49:14,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 05:49:14,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:14,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:14,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 05:49:14,629 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:14,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:14,630 INFO L85 PathProgramCache]: Analyzing trace with hash -60907143, now seen corresponding path program 1 times [2021-12-28 05:49:14,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:14,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438776337] [2021-12-28 05:49:14,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:14,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:14,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:14,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:14,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438776337] [2021-12-28 05:49:14,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438776337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:14,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:14,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:14,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466333817] [2021-12-28 05:49:14,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:14,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:14,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:14,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:14,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:14,660 INFO L87 Difference]: Start difference. First operand 312 states and 443 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) [2021-12-28 05:49:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:14,813 INFO L93 Difference]: Finished difference Result 489 states and 642 transitions. [2021-12-28 05:49:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:14,813 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 [2021-12-28 05:49:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:14,815 INFO L225 Difference]: With dead ends: 489 [2021-12-28 05:49:14,815 INFO L226 Difference]: Without dead ends: 489 [2021-12-28 05:49:14,815 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 [2021-12-28 05:49:14,815 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 259 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:14,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 360 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-28 05:49:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 318. [2021-12-28 05:49:14,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7439024390243902) internal successors, (429), 303 states have internal predecessors, (429), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-28 05:49:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 449 transitions. [2021-12-28 05:49:14,822 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 449 transitions. Word has length 15 [2021-12-28 05:49:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:14,822 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 449 transitions. [2021-12-28 05:49:14,822 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) [2021-12-28 05:49:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 449 transitions. [2021-12-28 05:49:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 05:49:14,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:14,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:14,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 05:49:14,823 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash -60907142, now seen corresponding path program 1 times [2021-12-28 05:49:14,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:14,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635123340] [2021-12-28 05:49:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:14,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:14,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:14,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635123340] [2021-12-28 05:49:14,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635123340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:14,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:14,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:14,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178879535] [2021-12-28 05:49:14,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:14,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:14,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:14,870 INFO L87 Difference]: Start difference. First operand 318 states and 449 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) [2021-12-28 05:49:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:14,981 INFO L93 Difference]: Finished difference Result 375 states and 473 transitions. [2021-12-28 05:49:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:14,981 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 [2021-12-28 05:49:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:14,983 INFO L225 Difference]: With dead ends: 375 [2021-12-28 05:49:14,983 INFO L226 Difference]: Without dead ends: 375 [2021-12-28 05:49:14,983 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 [2021-12-28 05:49:14,983 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 203 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 374 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 [2021-12-28 05:49:14,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 374 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-28 05:49:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 318. [2021-12-28 05:49:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7073170731707317) internal successors, (420), 303 states have internal predecessors, (420), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-28 05:49:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 440 transitions. [2021-12-28 05:49:14,990 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 440 transitions. Word has length 15 [2021-12-28 05:49:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:14,990 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 440 transitions. [2021-12-28 05:49:14,990 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) [2021-12-28 05:49:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 440 transitions. [2021-12-28 05:49:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 05:49:14,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:14,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:14,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 05:49:14,991 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:14,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:14,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1341254785, now seen corresponding path program 1 times [2021-12-28 05:49:14,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:14,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318379748] [2021-12-28 05:49:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:14,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:15,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:15,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318379748] [2021-12-28 05:49:15,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318379748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:15,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:15,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:49:15,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248210742] [2021-12-28 05:49:15,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:15,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:49:15,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:15,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:49:15,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:49:15,020 INFO L87 Difference]: Start difference. First operand 318 states and 440 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-12-28 05:49:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:15,087 INFO L93 Difference]: Finished difference Result 409 states and 539 transitions. [2021-12-28 05:49:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:49:15,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 19 [2021-12-28 05:49:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:15,089 INFO L225 Difference]: With dead ends: 409 [2021-12-28 05:49:15,089 INFO L226 Difference]: Without dead ends: 409 [2021-12-28 05:49:15,089 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 [2021-12-28 05:49:15,090 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 132 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:15,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 261 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-12-28 05:49:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 315. [2021-12-28 05:49:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 246 states have (on average 1.6829268292682926) internal successors, (414), 300 states have internal predecessors, (414), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-28 05:49:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 434 transitions. [2021-12-28 05:49:15,098 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 434 transitions. Word has length 19 [2021-12-28 05:49:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:15,099 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 434 transitions. [2021-12-28 05:49:15,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-12-28 05:49:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 434 transitions. [2021-12-28 05:49:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 05:49:15,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:15,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:15,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 05:49:15,100 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1341254786, now seen corresponding path program 1 times [2021-12-28 05:49:15,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:15,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358109982] [2021-12-28 05:49:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:15,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:15,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:15,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358109982] [2021-12-28 05:49:15,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358109982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:15,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:15,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:15,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927681622] [2021-12-28 05:49:15,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:15,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:15,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:15,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:15,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:15,158 INFO L87 Difference]: Start difference. First operand 315 states and 434 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-12-28 05:49:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:15,276 INFO L93 Difference]: Finished difference Result 532 states and 662 transitions. [2021-12-28 05:49:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:15,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 19 [2021-12-28 05:49:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:15,281 INFO L225 Difference]: With dead ends: 532 [2021-12-28 05:49:15,281 INFO L226 Difference]: Without dead ends: 532 [2021-12-28 05:49:15,281 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 [2021-12-28 05:49:15,281 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 283 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:15,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 459 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-12-28 05:49:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 318. [2021-12-28 05:49:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 250 states have (on average 1.664) internal successors, (416), 303 states have internal predecessors, (416), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-28 05:49:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 436 transitions. [2021-12-28 05:49:15,290 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 436 transitions. Word has length 19 [2021-12-28 05:49:15,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:15,290 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 436 transitions. [2021-12-28 05:49:15,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-12-28 05:49:15,290 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 436 transitions. [2021-12-28 05:49:15,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-28 05:49:15,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:15,291 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] [2021-12-28 05:49:15,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 05:49:15,291 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1370774597, now seen corresponding path program 1 times [2021-12-28 05:49:15,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:15,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156957884] [2021-12-28 05:49:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:15,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:15,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:15,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156957884] [2021-12-28 05:49:15,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156957884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:15,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:15,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:15,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841837362] [2021-12-28 05:49:15,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:15,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:15,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:15,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:15,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:15,361 INFO L87 Difference]: Start difference. First operand 318 states and 436 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-28 05:49:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:15,482 INFO L93 Difference]: Finished difference Result 531 states and 660 transitions. [2021-12-28 05:49:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 20 [2021-12-28 05:49:15,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:15,483 INFO L225 Difference]: With dead ends: 531 [2021-12-28 05:49:15,484 INFO L226 Difference]: Without dead ends: 531 [2021-12-28 05:49:15,484 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 [2021-12-28 05:49:15,484 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 344 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:15,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 439 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-28 05:49:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 320. [2021-12-28 05:49:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 252 states have (on average 1.6587301587301588) internal successors, (418), 305 states have internal predecessors, (418), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-28 05:49:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 438 transitions. [2021-12-28 05:49:15,493 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 438 transitions. Word has length 20 [2021-12-28 05:49:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:15,493 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 438 transitions. [2021-12-28 05:49:15,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-28 05:49:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 438 transitions. [2021-12-28 05:49:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-28 05:49:15,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:15,495 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] [2021-12-28 05:49:15,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 05:49:15,495 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:15,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1370718893, now seen corresponding path program 1 times [2021-12-28 05:49:15,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:15,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233797687] [2021-12-28 05:49:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:15,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:15,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:15,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233797687] [2021-12-28 05:49:15,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233797687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:15,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:15,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:49:15,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186797918] [2021-12-28 05:49:15,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:15,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:15,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:15,574 INFO L87 Difference]: Start difference. First operand 320 states and 438 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-12-28 05:49:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:15,640 INFO L93 Difference]: Finished difference Result 540 states and 713 transitions. [2021-12-28 05:49:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:49:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 20 [2021-12-28 05:49:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:15,643 INFO L225 Difference]: With dead ends: 540 [2021-12-28 05:49:15,643 INFO L226 Difference]: Without dead ends: 540 [2021-12-28 05:49:15,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:49:15,643 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 336 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:15,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 1239 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-28 05:49:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 348. [2021-12-28 05:49:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 275 states have (on average 1.6254545454545455) internal successors, (447), 329 states have internal predecessors, (447), 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) [2021-12-28 05:49:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 477 transitions. [2021-12-28 05:49:15,654 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 477 transitions. Word has length 20 [2021-12-28 05:49:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:15,656 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 477 transitions. [2021-12-28 05:49:15,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-12-28 05:49:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 477 transitions. [2021-12-28 05:49:15,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-28 05:49:15,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:15,657 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] [2021-12-28 05:49:15,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 05:49:15,657 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:15,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:15,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1370716971, now seen corresponding path program 1 times [2021-12-28 05:49:15,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:15,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842570331] [2021-12-28 05:49:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:15,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:15,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:15,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842570331] [2021-12-28 05:49:15,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842570331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:15,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:15,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:49:15,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531605030] [2021-12-28 05:49:15,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:15,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:15,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:15,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:15,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:15,740 INFO L87 Difference]: Start difference. First operand 348 states and 477 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-12-28 05:49:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:15,812 INFO L93 Difference]: Finished difference Result 530 states and 699 transitions. [2021-12-28 05:49:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:49:15,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 20 [2021-12-28 05:49:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:15,815 INFO L225 Difference]: With dead ends: 530 [2021-12-28 05:49:15,815 INFO L226 Difference]: Without dead ends: 530 [2021-12-28 05:49:15,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:49:15,816 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 323 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:15,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 1237 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-12-28 05:49:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 346. [2021-12-28 05:49:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 273 states have (on average 1.6227106227106227) internal successors, (443), 327 states have internal predecessors, (443), 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) [2021-12-28 05:49:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 473 transitions. [2021-12-28 05:49:15,824 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 473 transitions. Word has length 20 [2021-12-28 05:49:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:15,825 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 473 transitions. [2021-12-28 05:49:15,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-12-28 05:49:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 473 transitions. [2021-12-28 05:49:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-28 05:49:15,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:15,826 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] [2021-12-28 05:49:15,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 05:49:15,826 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:15,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1241636174, now seen corresponding path program 1 times [2021-12-28 05:49:15,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:15,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259444417] [2021-12-28 05:49:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:15,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:15,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:15,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259444417] [2021-12-28 05:49:15,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259444417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:15,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:15,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:15,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774219120] [2021-12-28 05:49:15,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:15,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:15,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:15,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:15,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:15,891 INFO L87 Difference]: Start difference. First operand 346 states and 473 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-28 05:49:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:16,020 INFO L93 Difference]: Finished difference Result 572 states and 718 transitions. [2021-12-28 05:49:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 20 [2021-12-28 05:49:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:16,022 INFO L225 Difference]: With dead ends: 572 [2021-12-28 05:49:16,022 INFO L226 Difference]: Without dead ends: 572 [2021-12-28 05:49:16,022 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 [2021-12-28 05:49:16,022 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 355 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:16,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 430 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-12-28 05:49:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 350. [2021-12-28 05:49:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 277 states have (on average 1.6137184115523466) internal successors, (447), 331 states have internal predecessors, (447), 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) [2021-12-28 05:49:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 477 transitions. [2021-12-28 05:49:16,030 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 477 transitions. Word has length 20 [2021-12-28 05:49:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:16,030 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 477 transitions. [2021-12-28 05:49:16,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-28 05:49:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 477 transitions. [2021-12-28 05:49:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-28 05:49:16,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:16,031 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] [2021-12-28 05:49:16,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 05:49:16,031 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1241634252, now seen corresponding path program 1 times [2021-12-28 05:49:16,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594056058] [2021-12-28 05:49:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:16,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:16,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:16,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:16,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594056058] [2021-12-28 05:49:16,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594056058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:16,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:16,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:49:16,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061538954] [2021-12-28 05:49:16,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:16,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:16,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:16,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:16,099 INFO L87 Difference]: Start difference. First operand 350 states and 477 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-12-28 05:49:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:16,173 INFO L93 Difference]: Finished difference Result 527 states and 693 transitions. [2021-12-28 05:49:16,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:49:16,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 20 [2021-12-28 05:49:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:16,176 INFO L225 Difference]: With dead ends: 527 [2021-12-28 05:49:16,176 INFO L226 Difference]: Without dead ends: 527 [2021-12-28 05:49:16,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:49:16,176 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 330 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:16,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 1465 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-28 05:49:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 345. [2021-12-28 05:49:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 273 states have (on average 1.6080586080586081) internal successors, (439), 326 states have internal predecessors, (439), 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) [2021-12-28 05:49:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 469 transitions. [2021-12-28 05:49:16,185 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 469 transitions. Word has length 20 [2021-12-28 05:49:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:16,185 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 469 transitions. [2021-12-28 05:49:16,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-12-28 05:49:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 469 transitions. [2021-12-28 05:49:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 05:49:16,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:16,187 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] [2021-12-28 05:49:16,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 05:49:16,187 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:16,187 INFO L85 PathProgramCache]: Analyzing trace with hash 712638781, now seen corresponding path program 1 times [2021-12-28 05:49:16,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:16,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243986524] [2021-12-28 05:49:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:16,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:16,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:16,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:16,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243986524] [2021-12-28 05:49:16,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243986524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:16,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:16,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 05:49:16,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178224826] [2021-12-28 05:49:16,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:16,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 05:49:16,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:16,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 05:49:16,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:16,393 INFO L87 Difference]: Start difference. First operand 345 states and 469 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) [2021-12-28 05:49:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:16,876 INFO L93 Difference]: Finished difference Result 580 states and 745 transitions. [2021-12-28 05:49:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 05:49:16,876 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 [2021-12-28 05:49:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:16,878 INFO L225 Difference]: With dead ends: 580 [2021-12-28 05:49:16,878 INFO L226 Difference]: Without dead ends: 578 [2021-12-28 05:49:16,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:49:16,879 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 400 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:16,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1230 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-12-28 05:49:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 339. [2021-12-28 05:49:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 267 states have (on average 1.6029962546816479) internal successors, (428), 320 states have internal predecessors, (428), 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) [2021-12-28 05:49:16,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 458 transitions. [2021-12-28 05:49:16,893 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 458 transitions. Word has length 21 [2021-12-28 05:49:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:16,893 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 458 transitions. [2021-12-28 05:49:16,893 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) [2021-12-28 05:49:16,893 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 458 transitions. [2021-12-28 05:49:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 05:49:16,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:16,894 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] [2021-12-28 05:49:16,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 05:49:16,894 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash 163984267, now seen corresponding path program 1 times [2021-12-28 05:49:16,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:16,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215775886] [2021-12-28 05:49:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:16,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:16,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:16,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:16,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215775886] [2021-12-28 05:49:16,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215775886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:16,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:16,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:16,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731651109] [2021-12-28 05:49:16,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:16,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:16,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:16,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:16,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:16,935 INFO L87 Difference]: Start difference. First operand 339 states and 458 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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) [2021-12-28 05:49:17,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:17,070 INFO L93 Difference]: Finished difference Result 557 states and 693 transitions. [2021-12-28 05:49:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:17,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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 [2021-12-28 05:49:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:17,072 INFO L225 Difference]: With dead ends: 557 [2021-12-28 05:49:17,072 INFO L226 Difference]: Without dead ends: 557 [2021-12-28 05:49:17,073 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 [2021-12-28 05:49:17,073 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 276 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 481 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 [2021-12-28 05:49:17,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 481 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-12-28 05:49:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 332. [2021-12-28 05:49:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 261 states have (on average 1.6091954022988506) internal successors, (420), 313 states have internal predecessors, (420), 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) [2021-12-28 05:49:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 450 transitions. [2021-12-28 05:49:17,080 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 450 transitions. Word has length 21 [2021-12-28 05:49:17,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:17,080 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 450 transitions. [2021-12-28 05:49:17,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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) [2021-12-28 05:49:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 450 transitions. [2021-12-28 05:49:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-28 05:49:17,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:17,081 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] [2021-12-28 05:49:17,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 05:49:17,081 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1953708264, now seen corresponding path program 1 times [2021-12-28 05:49:17,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:17,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288043403] [2021-12-28 05:49:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:17,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:17,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:17,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288043403] [2021-12-28 05:49:17,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288043403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:17,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:17,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:17,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808608392] [2021-12-28 05:49:17,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:17,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:17,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:17,121 INFO L87 Difference]: Start difference. First operand 332 states and 450 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) [2021-12-28 05:49:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:17,290 INFO L93 Difference]: Finished difference Result 494 states and 639 transitions. [2021-12-28 05:49:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:17,291 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 [2021-12-28 05:49:17,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:17,293 INFO L225 Difference]: With dead ends: 494 [2021-12-28 05:49:17,293 INFO L226 Difference]: Without dead ends: 494 [2021-12-28 05:49:17,293 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 [2021-12-28 05:49:17,294 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 227 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:17,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 352 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-12-28 05:49:17,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 360. [2021-12-28 05:49:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 289 states have (on average 1.6332179930795847) internal successors, (472), 341 states have internal predecessors, (472), 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) [2021-12-28 05:49:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 502 transitions. [2021-12-28 05:49:17,300 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 502 transitions. Word has length 23 [2021-12-28 05:49:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:17,300 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 502 transitions. [2021-12-28 05:49:17,300 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) [2021-12-28 05:49:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 502 transitions. [2021-12-28 05:49:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-28 05:49:17,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:17,301 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] [2021-12-28 05:49:17,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 05:49:17,301 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:17,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:17,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1953708265, now seen corresponding path program 1 times [2021-12-28 05:49:17,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:17,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768267724] [2021-12-28 05:49:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:17,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:17,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:17,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768267724] [2021-12-28 05:49:17,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768267724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:17,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:17,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:17,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574832501] [2021-12-28 05:49:17,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:17,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:17,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:17,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:17,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:17,398 INFO L87 Difference]: Start difference. First operand 360 states and 502 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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) [2021-12-28 05:49:17,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:17,633 INFO L93 Difference]: Finished difference Result 419 states and 533 transitions. [2021-12-28 05:49:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:17,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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 [2021-12-28 05:49:17,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:17,635 INFO L225 Difference]: With dead ends: 419 [2021-12-28 05:49:17,635 INFO L226 Difference]: Without dead ends: 419 [2021-12-28 05:49:17,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:17,636 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 378 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:17,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 449 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:17,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-28 05:49:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 360. [2021-12-28 05:49:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 289 states have (on average 1.602076124567474) internal successors, (463), 341 states have internal predecessors, (463), 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) [2021-12-28 05:49:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 493 transitions. [2021-12-28 05:49:17,642 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 493 transitions. Word has length 23 [2021-12-28 05:49:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:17,642 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 493 transitions. [2021-12-28 05:49:17,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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) [2021-12-28 05:49:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 493 transitions. [2021-12-28 05:49:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-28 05:49:17,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:17,643 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] [2021-12-28 05:49:17,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 05:49:17,643 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:17,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1811064258, now seen corresponding path program 1 times [2021-12-28 05:49:17,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:17,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140149659] [2021-12-28 05:49:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:17,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:17,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:17,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140149659] [2021-12-28 05:49:17,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140149659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:17,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:17,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 05:49:17,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836092160] [2021-12-28 05:49:17,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:17,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:49:17,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:17,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:49:17,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:49:17,761 INFO L87 Difference]: Start difference. First operand 360 states and 493 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-12-28 05:49:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:18,117 INFO L93 Difference]: Finished difference Result 799 states and 1037 transitions. [2021-12-28 05:49:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:49:18,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 24 [2021-12-28 05:49:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:18,120 INFO L225 Difference]: With dead ends: 799 [2021-12-28 05:49:18,120 INFO L226 Difference]: Without dead ends: 799 [2021-12-28 05:49:18,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:49:18,122 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 578 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:18,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 1435 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-12-28 05:49:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 392. [2021-12-28 05:49:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 321 states have (on average 1.5545171339563864) internal successors, (499), 371 states have internal predecessors, (499), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-28 05:49:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 529 transitions. [2021-12-28 05:49:18,141 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 529 transitions. Word has length 24 [2021-12-28 05:49:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:18,141 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 529 transitions. [2021-12-28 05:49:18,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-12-28 05:49:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 529 transitions. [2021-12-28 05:49:18,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 05:49:18,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:18,142 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] [2021-12-28 05:49:18,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 05:49:18,143 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1927577074, now seen corresponding path program 1 times [2021-12-28 05:49:18,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:18,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109335907] [2021-12-28 05:49:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:18,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:18,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:18,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109335907] [2021-12-28 05:49:18,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109335907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:18,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:18,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 05:49:18,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896456481] [2021-12-28 05:49:18,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:18,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:49:18,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:49:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:49:18,246 INFO L87 Difference]: Start difference. First operand 392 states and 529 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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) [2021-12-28 05:49:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:18,441 INFO L93 Difference]: Finished difference Result 632 states and 811 transitions. [2021-12-28 05:49:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 05:49:18,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 [2021-12-28 05:49:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:18,443 INFO L225 Difference]: With dead ends: 632 [2021-12-28 05:49:18,443 INFO L226 Difference]: Without dead ends: 632 [2021-12-28 05:49:18,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:49:18,443 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 241 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:18,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1363 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-28 05:49:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 394. [2021-12-28 05:49:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 323 states have (on average 1.5510835913312693) internal successors, (501), 373 states have internal predecessors, (501), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-28 05:49:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 531 transitions. [2021-12-28 05:49:18,451 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 531 transitions. Word has length 25 [2021-12-28 05:49:18,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:18,451 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 531 transitions. [2021-12-28 05:49:18,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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) [2021-12-28 05:49:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 531 transitions. [2021-12-28 05:49:18,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 05:49:18,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:18,452 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] [2021-12-28 05:49:18,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-28 05:49:18,452 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:18,453 INFO L85 PathProgramCache]: Analyzing trace with hash -970840895, now seen corresponding path program 1 times [2021-12-28 05:49:18,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:18,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181007578] [2021-12-28 05:49:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:18,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:18,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181007578] [2021-12-28 05:49:18,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181007578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:18,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:18,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:18,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291066183] [2021-12-28 05:49:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:18,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:18,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:18,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:18,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:18,527 INFO L87 Difference]: Start difference. First operand 394 states and 531 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 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) [2021-12-28 05:49:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:18,729 INFO L93 Difference]: Finished difference Result 515 states and 640 transitions. [2021-12-28 05:49:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 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 [2021-12-28 05:49:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:18,731 INFO L225 Difference]: With dead ends: 515 [2021-12-28 05:49:18,731 INFO L226 Difference]: Without dead ends: 515 [2021-12-28 05:49:18,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:18,731 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 609 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:18,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 365 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-12-28 05:49:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 405. [2021-12-28 05:49:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 339 states have (on average 1.5309734513274336) internal successors, (519), 383 states have internal predecessors, (519), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-28 05:49:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 552 transitions. [2021-12-28 05:49:18,738 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 552 transitions. Word has length 26 [2021-12-28 05:49:18,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:18,738 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 552 transitions. [2021-12-28 05:49:18,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 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) [2021-12-28 05:49:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 552 transitions. [2021-12-28 05:49:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-28 05:49:18,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:18,738 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] [2021-12-28 05:49:18,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-28 05:49:18,739 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:18,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:18,739 INFO L85 PathProgramCache]: Analyzing trace with hash 622100015, now seen corresponding path program 1 times [2021-12-28 05:49:18,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:18,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143245514] [2021-12-28 05:49:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:18,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:18,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:18,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143245514] [2021-12-28 05:49:18,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143245514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:18,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:18,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:49:18,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176158463] [2021-12-28 05:49:18,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:18,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:18,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:18,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:18,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:18,785 INFO L87 Difference]: Start difference. First operand 405 states and 552 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) [2021-12-28 05:49:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:18,884 INFO L93 Difference]: Finished difference Result 461 states and 604 transitions. [2021-12-28 05:49:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:18,884 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 [2021-12-28 05:49:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:18,886 INFO L225 Difference]: With dead ends: 461 [2021-12-28 05:49:18,886 INFO L226 Difference]: Without dead ends: 461 [2021-12-28 05:49:18,886 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 [2021-12-28 05:49:18,887 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 151 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 528 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 [2021-12-28 05:49:18,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 528 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:18,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-28 05:49:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 405. [2021-12-28 05:49:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 339 states have (on average 1.528023598820059) internal successors, (518), 383 states have internal predecessors, (518), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-28 05:49:18,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 551 transitions. [2021-12-28 05:49:18,893 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 551 transitions. Word has length 27 [2021-12-28 05:49:18,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:18,893 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 551 transitions. [2021-12-28 05:49:18,893 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) [2021-12-28 05:49:18,894 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 551 transitions. [2021-12-28 05:49:18,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-28 05:49:18,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:18,894 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] [2021-12-28 05:49:18,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-28 05:49:18,894 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:18,895 INFO L85 PathProgramCache]: Analyzing trace with hash -31296654, now seen corresponding path program 1 times [2021-12-28 05:49:18,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:18,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425729246] [2021-12-28 05:49:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:18,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:18,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:18,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425729246] [2021-12-28 05:49:18,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425729246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:18,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:18,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:18,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127057939] [2021-12-28 05:49:18,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:18,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:18,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:18,947 INFO L87 Difference]: Start difference. First operand 405 states and 551 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2021-12-28 05:49:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:19,061 INFO L93 Difference]: Finished difference Result 442 states and 562 transitions. [2021-12-28 05:49:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:19,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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 [2021-12-28 05:49:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:19,063 INFO L225 Difference]: With dead ends: 442 [2021-12-28 05:49:19,063 INFO L226 Difference]: Without dead ends: 442 [2021-12-28 05:49:19,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:49:19,063 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 392 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:19,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 726 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-28 05:49:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 403. [2021-12-28 05:49:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 339 states have (on average 1.5162241887905605) internal successors, (514), 381 states have internal predecessors, (514), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-28 05:49:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 547 transitions. [2021-12-28 05:49:19,069 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 547 transitions. Word has length 27 [2021-12-28 05:49:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:19,069 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 547 transitions. [2021-12-28 05:49:19,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2021-12-28 05:49:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 547 transitions. [2021-12-28 05:49:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-28 05:49:19,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:19,069 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] [2021-12-28 05:49:19,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-28 05:49:19,069 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:19,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2105231472, now seen corresponding path program 1 times [2021-12-28 05:49:19,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:19,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017922815] [2021-12-28 05:49:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:19,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:19,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:19,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017922815] [2021-12-28 05:49:19,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017922815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:19,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:19,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:49:19,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064784069] [2021-12-28 05:49:19,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:19,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:19,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:19,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:19,132 INFO L87 Difference]: Start difference. First operand 403 states and 547 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) [2021-12-28 05:49:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:19,258 INFO L93 Difference]: Finished difference Result 528 states and 692 transitions. [2021-12-28 05:49:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:49:19,258 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 [2021-12-28 05:49:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:19,260 INFO L225 Difference]: With dead ends: 528 [2021-12-28 05:49:19,260 INFO L226 Difference]: Without dead ends: 528 [2021-12-28 05:49:19,260 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 [2021-12-28 05:49:19,260 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 178 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:19,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 501 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-12-28 05:49:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 441. [2021-12-28 05:49:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 373 states have (on average 1.5120643431635388) internal successors, (564), 417 states have internal predecessors, (564), 13 states have call successors, (13), 6 states have call predecessors, (13), 12 states have return successors, (26), 17 states have call predecessors, (26), 13 states have call successors, (26) [2021-12-28 05:49:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 603 transitions. [2021-12-28 05:49:19,277 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 603 transitions. Word has length 28 [2021-12-28 05:49:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:19,278 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 603 transitions. [2021-12-28 05:49:19,278 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) [2021-12-28 05:49:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 603 transitions. [2021-12-28 05:49:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 05:49:19,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:19,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:19,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-28 05:49:19,280 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:19,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:19,280 INFO L85 PathProgramCache]: Analyzing trace with hash -11312492, now seen corresponding path program 1 times [2021-12-28 05:49:19,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:19,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137984036] [2021-12-28 05:49:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:19,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:19,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:19,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137984036] [2021-12-28 05:49:19,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137984036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:19,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:19,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:19,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928250567] [2021-12-28 05:49:19,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:19,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:19,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:19,373 INFO L87 Difference]: Start difference. First operand 441 states and 603 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2021-12-28 05:49:19,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:19,601 INFO L93 Difference]: Finished difference Result 552 states and 688 transitions. [2021-12-28 05:49:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:49:19,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 29 [2021-12-28 05:49:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:19,603 INFO L225 Difference]: With dead ends: 552 [2021-12-28 05:49:19,603 INFO L226 Difference]: Without dead ends: 552 [2021-12-28 05:49:19,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:49:19,604 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 711 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:19,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 333 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-12-28 05:49:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 444. [2021-12-28 05:49:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 377 states have (on average 1.5013262599469497) internal successors, (566), 418 states have internal predecessors, (566), 14 states have call successors, (14), 6 states have call predecessors, (14), 12 states have return successors, (28), 19 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-28 05:49:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 608 transitions. [2021-12-28 05:49:19,610 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 608 transitions. Word has length 29 [2021-12-28 05:49:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:19,610 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 608 transitions. [2021-12-28 05:49:19,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2021-12-28 05:49:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 608 transitions. [2021-12-28 05:49:19,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:49:19,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:19,610 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] [2021-12-28 05:49:19,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-28 05:49:19,610 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:19,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:19,611 INFO L85 PathProgramCache]: Analyzing trace with hash 880183511, now seen corresponding path program 1 times [2021-12-28 05:49:19,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:19,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126418016] [2021-12-28 05:49:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:19,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:19,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:19,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126418016] [2021-12-28 05:49:19,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126418016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:19,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:19,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:19,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572576227] [2021-12-28 05:49:19,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:19,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:19,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:19,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:19,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:19,644 INFO L87 Difference]: Start difference. First operand 444 states and 608 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) [2021-12-28 05:49:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:19,673 INFO L93 Difference]: Finished difference Result 919 states and 1272 transitions. [2021-12-28 05:49:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:19,673 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 [2021-12-28 05:49:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:19,675 INFO L225 Difference]: With dead ends: 919 [2021-12-28 05:49:19,676 INFO L226 Difference]: Without dead ends: 919 [2021-12-28 05:49:19,676 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 [2021-12-28 05:49:19,677 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 212 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:19,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 738 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-12-28 05:49:19,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 549. [2021-12-28 05:49:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 482 states have (on average 1.5145228215767634) internal successors, (730), 516 states have internal predecessors, (730), 14 states have call successors, (14), 6 states have call predecessors, (14), 12 states have return successors, (28), 26 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-28 05:49:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 772 transitions. [2021-12-28 05:49:19,695 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 772 transitions. Word has length 30 [2021-12-28 05:49:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:19,696 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 772 transitions. [2021-12-28 05:49:19,696 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) [2021-12-28 05:49:19,696 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 772 transitions. [2021-12-28 05:49:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:49:19,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:19,696 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] [2021-12-28 05:49:19,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-28 05:49:19,697 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:19,697 INFO L85 PathProgramCache]: Analyzing trace with hash 880185433, now seen corresponding path program 1 times [2021-12-28 05:49:19,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:19,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512259203] [2021-12-28 05:49:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:19,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:19,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:19,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512259203] [2021-12-28 05:49:19,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512259203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:19,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:19,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:19,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047003492] [2021-12-28 05:49:19,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:19,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:19,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:19,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:19,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:19,756 INFO L87 Difference]: Start difference. First operand 549 states and 772 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) [2021-12-28 05:49:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:19,942 INFO L93 Difference]: Finished difference Result 1117 states and 1535 transitions. [2021-12-28 05:49:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:49:19,942 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 [2021-12-28 05:49:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:19,945 INFO L225 Difference]: With dead ends: 1117 [2021-12-28 05:49:19,945 INFO L226 Difference]: Without dead ends: 1117 [2021-12-28 05:49:19,946 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 [2021-12-28 05:49:19,946 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 458 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:19,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 1210 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-12-28 05:49:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 587. [2021-12-28 05:49:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 520 states have (on average 1.5096153846153846) internal successors, (785), 554 states have internal predecessors, (785), 14 states have call successors, (14), 6 states have call predecessors, (14), 12 states have return successors, (28), 26 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-28 05:49:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 827 transitions. [2021-12-28 05:49:19,958 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 827 transitions. Word has length 30 [2021-12-28 05:49:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:19,958 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 827 transitions. [2021-12-28 05:49:19,959 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) [2021-12-28 05:49:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 827 transitions. [2021-12-28 05:49:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:49:19,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:19,959 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] [2021-12-28 05:49:19,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-28 05:49:19,959 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:19,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:19,960 INFO L85 PathProgramCache]: Analyzing trace with hash 197854354, now seen corresponding path program 1 times [2021-12-28 05:49:19,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:19,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888911227] [2021-12-28 05:49:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:19,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:20,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:20,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888911227] [2021-12-28 05:49:20,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888911227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:20,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:20,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:20,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242184069] [2021-12-28 05:49:20,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:20,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:20,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:20,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:20,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:20,037 INFO L87 Difference]: Start difference. First operand 587 states and 827 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) [2021-12-28 05:49:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:20,379 INFO L93 Difference]: Finished difference Result 1044 states and 1446 transitions. [2021-12-28 05:49:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:20,379 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 [2021-12-28 05:49:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:20,382 INFO L225 Difference]: With dead ends: 1044 [2021-12-28 05:49:20,382 INFO L226 Difference]: Without dead ends: 1044 [2021-12-28 05:49:20,383 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 [2021-12-28 05:49:20,383 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 375 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:20,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 800 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-12-28 05:49:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 630. [2021-12-28 05:49:20,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 559 states have (on average 1.4901610017889089) internal successors, (833), 594 states have internal predecessors, (833), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-28 05:49:20,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 881 transitions. [2021-12-28 05:49:20,393 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 881 transitions. Word has length 30 [2021-12-28 05:49:20,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:20,393 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 881 transitions. [2021-12-28 05:49:20,393 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) [2021-12-28 05:49:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 881 transitions. [2021-12-28 05:49:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:49:20,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:20,394 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, 1, 1] [2021-12-28 05:49:20,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-28 05:49:20,394 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:20,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:20,394 INFO L85 PathProgramCache]: Analyzing trace with hash 471361208, now seen corresponding path program 1 times [2021-12-28 05:49:20,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:20,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508732298] [2021-12-28 05:49:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:20,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:20,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:20,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508732298] [2021-12-28 05:49:20,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508732298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:20,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:20,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:20,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914716907] [2021-12-28 05:49:20,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:20,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:20,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:20,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:20,431 INFO L87 Difference]: Start difference. First operand 630 states and 881 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) [2021-12-28 05:49:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:20,453 INFO L93 Difference]: Finished difference Result 925 states and 1259 transitions. [2021-12-28 05:49:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:20,454 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 [2021-12-28 05:49:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:20,456 INFO L225 Difference]: With dead ends: 925 [2021-12-28 05:49:20,456 INFO L226 Difference]: Without dead ends: 925 [2021-12-28 05:49:20,456 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 [2021-12-28 05:49:20,456 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 191 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 886 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 [2021-12-28 05:49:20,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 886 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-12-28 05:49:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 622. [2021-12-28 05:49:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 551 states have (on average 1.4900181488203266) internal successors, (821), 586 states have internal predecessors, (821), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-28 05:49:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 869 transitions. [2021-12-28 05:49:20,464 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 869 transitions. Word has length 30 [2021-12-28 05:49:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:20,465 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 869 transitions. [2021-12-28 05:49:20,465 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) [2021-12-28 05:49:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 869 transitions. [2021-12-28 05:49:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:49:20,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:20,465 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] [2021-12-28 05:49:20,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-28 05:49:20,465 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:20,466 INFO L85 PathProgramCache]: Analyzing trace with hash 473206328, now seen corresponding path program 1 times [2021-12-28 05:49:20,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:20,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224494214] [2021-12-28 05:49:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:20,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:20,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:20,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224494214] [2021-12-28 05:49:20,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224494214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:20,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:20,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:20,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014431187] [2021-12-28 05:49:20,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:20,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:20,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:20,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:20,523 INFO L87 Difference]: Start difference. First operand 622 states and 869 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) [2021-12-28 05:49:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:20,696 INFO L93 Difference]: Finished difference Result 1101 states and 1484 transitions. [2021-12-28 05:49:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:49:20,696 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 [2021-12-28 05:49:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:20,699 INFO L225 Difference]: With dead ends: 1101 [2021-12-28 05:49:20,699 INFO L226 Difference]: Without dead ends: 1101 [2021-12-28 05:49:20,699 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 [2021-12-28 05:49:20,700 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 418 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:20,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 1388 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-12-28 05:49:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 589. [2021-12-28 05:49:20,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 521 states have (on average 1.4510556621881) internal successors, (756), 553 states have internal predecessors, (756), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-28 05:49:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 804 transitions. [2021-12-28 05:49:20,708 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 804 transitions. Word has length 30 [2021-12-28 05:49:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:20,708 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 804 transitions. [2021-12-28 05:49:20,708 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) [2021-12-28 05:49:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 804 transitions. [2021-12-28 05:49:20,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-28 05:49:20,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:20,709 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] [2021-12-28 05:49:20,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-28 05:49:20,709 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:20,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1838517875, now seen corresponding path program 1 times [2021-12-28 05:49:20,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:20,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046479558] [2021-12-28 05:49:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:20,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:20,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:20,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046479558] [2021-12-28 05:49:20,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046479558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:20,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:20,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:20,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232438775] [2021-12-28 05:49:20,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:20,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:20,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:20,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:20,811 INFO L87 Difference]: Start difference. First operand 589 states and 804 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) [2021-12-28 05:49:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:21,078 INFO L93 Difference]: Finished difference Result 771 states and 993 transitions. [2021-12-28 05:49:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:49:21,078 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 [2021-12-28 05:49:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:21,080 INFO L225 Difference]: With dead ends: 771 [2021-12-28 05:49:21,080 INFO L226 Difference]: Without dead ends: 771 [2021-12-28 05:49:21,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:49:21,081 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 598 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:21,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 566 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-12-28 05:49:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 589. [2021-12-28 05:49:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 521 states have (on average 1.4433781190019195) internal successors, (752), 553 states have internal predecessors, (752), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 28 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-28 05:49:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 800 transitions. [2021-12-28 05:49:21,089 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 800 transitions. Word has length 31 [2021-12-28 05:49:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:21,089 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 800 transitions. [2021-12-28 05:49:21,089 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) [2021-12-28 05:49:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 800 transitions. [2021-12-28 05:49:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-28 05:49:21,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:21,090 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] [2021-12-28 05:49:21,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-28 05:49:21,090 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:21,091 INFO L85 PathProgramCache]: Analyzing trace with hash -250351879, now seen corresponding path program 1 times [2021-12-28 05:49:21,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:21,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299256653] [2021-12-28 05:49:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:21,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:21,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:21,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299256653] [2021-12-28 05:49:21,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299256653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:21,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:21,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:21,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235183736] [2021-12-28 05:49:21,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:21,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:21,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:21,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:21,207 INFO L87 Difference]: Start difference. First operand 589 states and 800 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) [2021-12-28 05:49:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:21,344 INFO L93 Difference]: Finished difference Result 620 states and 832 transitions. [2021-12-28 05:49:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:21,344 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 [2021-12-28 05:49:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:21,346 INFO L225 Difference]: With dead ends: 620 [2021-12-28 05:49:21,346 INFO L226 Difference]: Without dead ends: 620 [2021-12-28 05:49:21,346 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 [2021-12-28 05:49:21,346 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 94 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:21,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 653 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-12-28 05:49:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 568. [2021-12-28 05:49:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 500 states have (on average 1.45) internal successors, (725), 534 states have internal predecessors, (725), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 26 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-28 05:49:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 773 transitions. [2021-12-28 05:49:21,364 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 773 transitions. Word has length 32 [2021-12-28 05:49:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:21,364 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 773 transitions. [2021-12-28 05:49:21,364 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) [2021-12-28 05:49:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 773 transitions. [2021-12-28 05:49:21,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-28 05:49:21,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:21,365 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] [2021-12-28 05:49:21,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-28 05:49:21,365 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:21,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1439584979, now seen corresponding path program 1 times [2021-12-28 05:49:21,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:21,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505623926] [2021-12-28 05:49:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:21,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 05:49:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:49:21,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:21,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505623926] [2021-12-28 05:49:21,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505623926] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:21,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790944369] [2021-12-28 05:49:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:21,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:21,541 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) [2021-12-28 05:49:21,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 05:49:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-28 05:49:21,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:21,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:49:22,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:49:22,035 INFO L387 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 30 treesize of output 34 [2021-12-28 05:49:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:49:22,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790944369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:49:22,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:49:22,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 26 [2021-12-28 05:49:22,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848261753] [2021-12-28 05:49:22,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:49:22,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-28 05:49:22,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:22,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-28 05:49:22,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-12-28 05:49:22,239 INFO L87 Difference]: Start difference. First operand 568 states and 773 transitions. Second operand has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 05:49:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:22,868 INFO L93 Difference]: Finished difference Result 856 states and 1118 transitions. [2021-12-28 05:49:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 05:49:22,868 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2021-12-28 05:49:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:22,870 INFO L225 Difference]: With dead ends: 856 [2021-12-28 05:49:22,870 INFO L226 Difference]: Without dead ends: 856 [2021-12-28 05:49:22,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 05:49:22,871 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1550 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:22,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1554 Valid, 1962 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:49:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-12-28 05:49:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 563. [2021-12-28 05:49:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 496 states have (on average 1.4375) internal successors, (713), 531 states have internal predecessors, (713), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-28 05:49:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 761 transitions. [2021-12-28 05:49:22,878 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 761 transitions. Word has length 40 [2021-12-28 05:49:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:22,878 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 761 transitions. [2021-12-28 05:49:22,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 05:49:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 761 transitions. [2021-12-28 05:49:22,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-28 05:49:22,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:22,879 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] [2021-12-28 05:49:22,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:23,096 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,SelfDestructingSolverStorable37 [2021-12-28 05:49:23,096 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:23,097 INFO L85 PathProgramCache]: Analyzing trace with hash 112861475, now seen corresponding path program 1 times [2021-12-28 05:49:23,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:23,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429500815] [2021-12-28 05:49:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:23,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:23,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:23,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429500815] [2021-12-28 05:49:23,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429500815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:23,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:23,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:23,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336497876] [2021-12-28 05:49:23,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:23,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:23,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:23,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:23,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:23,164 INFO L87 Difference]: Start difference. First operand 563 states and 761 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 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) [2021-12-28 05:49:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:23,267 INFO L93 Difference]: Finished difference Result 640 states and 817 transitions. [2021-12-28 05:49:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:49:23,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 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 40 [2021-12-28 05:49:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:23,269 INFO L225 Difference]: With dead ends: 640 [2021-12-28 05:49:23,269 INFO L226 Difference]: Without dead ends: 640 [2021-12-28 05:49:23,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:49:23,270 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 472 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:23,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 414 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-12-28 05:49:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 563. [2021-12-28 05:49:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 496 states have (on average 1.4375) internal successors, (713), 531 states have internal predecessors, (713), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-28 05:49:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 761 transitions. [2021-12-28 05:49:23,276 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 761 transitions. Word has length 40 [2021-12-28 05:49:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:23,276 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 761 transitions. [2021-12-28 05:49:23,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 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) [2021-12-28 05:49:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 761 transitions. [2021-12-28 05:49:23,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-28 05:49:23,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:23,276 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] [2021-12-28 05:49:23,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-28 05:49:23,277 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:23,277 INFO L85 PathProgramCache]: Analyzing trace with hash 112861413, now seen corresponding path program 1 times [2021-12-28 05:49:23,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:23,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568302959] [2021-12-28 05:49:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:23,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:23,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:23,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568302959] [2021-12-28 05:49:23,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568302959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:23,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:23,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-28 05:49:23,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612212610] [2021-12-28 05:49:23,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:23,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:49:23,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:23,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:49:23,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:49:23,482 INFO L87 Difference]: Start difference. First operand 563 states and 761 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-12-28 05:49:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:23,918 INFO L93 Difference]: Finished difference Result 912 states and 1170 transitions. [2021-12-28 05:49:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 05:49:23,919 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 40 [2021-12-28 05:49:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:23,921 INFO L225 Difference]: With dead ends: 912 [2021-12-28 05:49:23,921 INFO L226 Difference]: Without dead ends: 912 [2021-12-28 05:49:23,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-12-28 05:49:23,921 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 819 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:23,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 1033 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-12-28 05:49:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 764. [2021-12-28 05:49:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 687 states have (on average 1.4599708879184863) internal successors, (1003), 724 states have internal predecessors, (1003), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 30 states have call predecessors, (44), 22 states have call successors, (44) [2021-12-28 05:49:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1069 transitions. [2021-12-28 05:49:23,930 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1069 transitions. Word has length 40 [2021-12-28 05:49:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:23,930 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1069 transitions. [2021-12-28 05:49:23,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-12-28 05:49:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1069 transitions. [2021-12-28 05:49:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-28 05:49:23,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:23,931 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] [2021-12-28 05:49:23,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-28 05:49:23,931 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:23,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1897242428, now seen corresponding path program 1 times [2021-12-28 05:49:23,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:23,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583525505] [2021-12-28 05:49:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:23,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:23,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:23,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583525505] [2021-12-28 05:49:23,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583525505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:23,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:23,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:49:23,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472321754] [2021-12-28 05:49:23,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:23,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:23,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:23,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:23,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:23,998 INFO L87 Difference]: Start difference. First operand 764 states and 1069 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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) [2021-12-28 05:49:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:24,039 INFO L93 Difference]: Finished difference Result 817 states and 1089 transitions. [2021-12-28 05:49:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:24,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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 40 [2021-12-28 05:49:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:24,041 INFO L225 Difference]: With dead ends: 817 [2021-12-28 05:49:24,042 INFO L226 Difference]: Without dead ends: 817 [2021-12-28 05:49:24,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:49:24,042 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 154 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:24,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1174 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-12-28 05:49:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 764. [2021-12-28 05:49:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 687 states have (on average 1.4541484716157205) internal successors, (999), 724 states have internal predecessors, (999), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 30 states have call predecessors, (44), 22 states have call successors, (44) [2021-12-28 05:49:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1065 transitions. [2021-12-28 05:49:24,050 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1065 transitions. Word has length 40 [2021-12-28 05:49:24,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:24,050 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1065 transitions. [2021-12-28 05:49:24,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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) [2021-12-28 05:49:24,050 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1065 transitions. [2021-12-28 05:49:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-28 05:49:24,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:24,051 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] [2021-12-28 05:49:24,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-28 05:49:24,051 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash -218564434, now seen corresponding path program 1 times [2021-12-28 05:49:24,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:24,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694935477] [2021-12-28 05:49:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:24,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 05:49:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:49:24,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:24,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694935477] [2021-12-28 05:49:24,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694935477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:24,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:24,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:24,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075958952] [2021-12-28 05:49:24,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:24,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:24,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:24,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:24,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:24,108 INFO L87 Difference]: Start difference. First operand 764 states and 1065 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 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) [2021-12-28 05:49:24,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:24,240 INFO L93 Difference]: Finished difference Result 895 states and 1192 transitions. [2021-12-28 05:49:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:49:24,240 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), 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 42 [2021-12-28 05:49:24,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:24,243 INFO L225 Difference]: With dead ends: 895 [2021-12-28 05:49:24,243 INFO L226 Difference]: Without dead ends: 895 [2021-12-28 05:49:24,243 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 [2021-12-28 05:49:24,243 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 367 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:24,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 357 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-12-28 05:49:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 762. [2021-12-28 05:49:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 687 states have (on average 1.4192139737991267) internal successors, (975), 722 states have internal predecessors, (975), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 30 states have call predecessors, (44), 22 states have call successors, (44) [2021-12-28 05:49:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1041 transitions. [2021-12-28 05:49:24,252 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1041 transitions. Word has length 42 [2021-12-28 05:49:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:24,252 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1041 transitions. [2021-12-28 05:49:24,252 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), 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) [2021-12-28 05:49:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1041 transitions. [2021-12-28 05:49:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 05:49:24,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:24,253 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] [2021-12-28 05:49:24,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-28 05:49:24,253 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:24,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1902204747, now seen corresponding path program 1 times [2021-12-28 05:49:24,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:24,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464803459] [2021-12-28 05:49:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:24,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:24,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:24,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464803459] [2021-12-28 05:49:24,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464803459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:24,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:24,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:24,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262339729] [2021-12-28 05:49:24,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:24,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:24,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:24,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:24,328 INFO L87 Difference]: Start difference. First operand 762 states and 1041 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 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) [2021-12-28 05:49:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:24,434 INFO L93 Difference]: Finished difference Result 844 states and 1104 transitions. [2021-12-28 05:49:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:49:24,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 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 41 [2021-12-28 05:49:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:24,437 INFO L225 Difference]: With dead ends: 844 [2021-12-28 05:49:24,437 INFO L226 Difference]: Without dead ends: 844 [2021-12-28 05:49:24,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:24,437 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 497 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:24,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 440 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-12-28 05:49:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 554. [2021-12-28 05:49:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 490 states have (on average 1.4) internal successors, (686), 522 states have internal predecessors, (686), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-28 05:49:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 734 transitions. [2021-12-28 05:49:24,449 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 734 transitions. Word has length 41 [2021-12-28 05:49:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:24,450 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 734 transitions. [2021-12-28 05:49:24,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 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) [2021-12-28 05:49:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 734 transitions. [2021-12-28 05:49:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 05:49:24,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:24,451 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] [2021-12-28 05:49:24,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-28 05:49:24,451 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash -853472827, now seen corresponding path program 1 times [2021-12-28 05:49:24,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174632100] [2021-12-28 05:49:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:24,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 05:49:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:49:24,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174632100] [2021-12-28 05:49:24,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174632100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249476461] [2021-12-28 05:49:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:24,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:24,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:24,489 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) [2021-12-28 05:49:24,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 05:49:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-28 05:49:24,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:24,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:49:24,744 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-28 05:49:24,745 INFO L387 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 [2021-12-28 05:49:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:49:24,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249476461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:49:24,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:49:24,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-28 05:49:24,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933916057] [2021-12-28 05:49:24,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:49:24,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:49:24,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:24,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:49:24,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:49:24,787 INFO L87 Difference]: Start difference. First operand 554 states and 734 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) [2021-12-28 05:49:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:25,258 INFO L93 Difference]: Finished difference Result 1615 states and 2028 transitions. [2021-12-28 05:49:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 05:49:25,259 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 [2021-12-28 05:49:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:25,262 INFO L225 Difference]: With dead ends: 1615 [2021-12-28 05:49:25,262 INFO L226 Difference]: Without dead ends: 1615 [2021-12-28 05:49:25,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:49:25,262 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 1491 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:25,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 1132 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:49:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-12-28 05:49:25,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 675. [2021-12-28 05:49:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 603 states have (on average 1.306799336650083) internal successors, (788), 628 states have internal predecessors, (788), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 36 states have call predecessors, (48), 24 states have call successors, (48) [2021-12-28 05:49:25,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 860 transitions. [2021-12-28 05:49:25,296 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 860 transitions. Word has length 43 [2021-12-28 05:49:25,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:25,296 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 860 transitions. [2021-12-28 05:49:25,296 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) [2021-12-28 05:49:25,296 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 860 transitions. [2021-12-28 05:49:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 05:49:25,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:25,297 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] [2021-12-28 05:49:25,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-28 05:49:25,497 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,SelfDestructingSolverStorable43 [2021-12-28 05:49:25,497 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash -703021945, now seen corresponding path program 1 times [2021-12-28 05:49:25,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:25,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741404711] [2021-12-28 05:49:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:25,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:26,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:26,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:26,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741404711] [2021-12-28 05:49:26,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741404711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:26,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:26,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-28 05:49:26,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302020482] [2021-12-28 05:49:26,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:26,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:49:26,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:49:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:49:26,075 INFO L87 Difference]: Start difference. First operand 675 states and 860 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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) [2021-12-28 05:49:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:26,697 INFO L93 Difference]: Finished difference Result 974 states and 1227 transitions. [2021-12-28 05:49:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 05:49:26,698 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 43 [2021-12-28 05:49:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:26,700 INFO L225 Difference]: With dead ends: 974 [2021-12-28 05:49:26,700 INFO L226 Difference]: Without dead ends: 974 [2021-12-28 05:49:26,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-12-28 05:49:26,701 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 500 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:26,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 1190 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-12-28 05:49:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 703. [2021-12-28 05:49:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 631 states have (on average 1.2963549920760697) internal successors, (818), 656 states have internal predecessors, (818), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 36 states have call predecessors, (48), 24 states have call successors, (48) [2021-12-28 05:49:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 890 transitions. [2021-12-28 05:49:26,709 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 890 transitions. Word has length 43 [2021-12-28 05:49:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:26,709 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 890 transitions. [2021-12-28 05:49:26,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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) [2021-12-28 05:49:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 890 transitions. [2021-12-28 05:49:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 05:49:26,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:26,710 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] [2021-12-28 05:49:26,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-28 05:49:26,710 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:26,711 INFO L85 PathProgramCache]: Analyzing trace with hash 494131847, now seen corresponding path program 1 times [2021-12-28 05:49:26,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:26,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163535449] [2021-12-28 05:49:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:26,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:26,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:26,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163535449] [2021-12-28 05:49:26,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163535449] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:26,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580577768] [2021-12-28 05:49:26,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:26,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:26,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:26,920 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) [2021-12-28 05:49:26,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 05:49:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:27,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-28 05:49:27,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:27,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-28 05:49:27,351 INFO L387 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 [2021-12-28 05:49:27,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:27,518 INFO L387 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 25 treesize of output 9 [2021-12-28 05:49:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:27,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:27,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580577768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:27,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:27,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2021-12-28 05:49:27,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213311272] [2021-12-28 05:49:27,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:27,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 05:49:27,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:27,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 05:49:27,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:49:27,526 INFO L87 Difference]: Start difference. First operand 703 states and 890 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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) [2021-12-28 05:49:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:27,850 INFO L93 Difference]: Finished difference Result 1153 states and 1442 transitions. [2021-12-28 05:49:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:49:27,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 44 [2021-12-28 05:49:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:27,852 INFO L225 Difference]: With dead ends: 1153 [2021-12-28 05:49:27,852 INFO L226 Difference]: Without dead ends: 1153 [2021-12-28 05:49:27,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-12-28 05:49:27,853 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 705 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:27,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 978 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 403 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2021-12-28 05:49:27,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-12-28 05:49:27,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1021. [2021-12-28 05:49:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 931 states have (on average 1.3071965628356605) internal successors, (1217), 951 states have internal predecessors, (1217), 37 states have call successors, (37), 13 states have call predecessors, (37), 26 states have return successors, (74), 56 states have call predecessors, (74), 37 states have call successors, (74) [2021-12-28 05:49:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1328 transitions. [2021-12-28 05:49:27,867 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1328 transitions. Word has length 44 [2021-12-28 05:49:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:27,867 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1328 transitions. [2021-12-28 05:49:27,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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) [2021-12-28 05:49:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1328 transitions. [2021-12-28 05:49:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 05:49:27,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:27,868 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] [2021-12-28 05:49:27,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:28,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:28,072 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash 494131848, now seen corresponding path program 1 times [2021-12-28 05:49:28,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:28,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72459081] [2021-12-28 05:49:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:28,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:28,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:28,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:28,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72459081] [2021-12-28 05:49:28,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72459081] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:28,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245192421] [2021-12-28 05:49:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:28,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:28,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:28,320 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) [2021-12-28 05:49:28,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 05:49:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:28,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-28 05:49:28,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:28,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-28 05:49:28,834 INFO L387 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 [2021-12-28 05:49:28,837 INFO L387 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 [2021-12-28 05:49:29,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:29,022 INFO L387 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 23 treesize of output 7 [2021-12-28 05:49:29,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:29,026 INFO L387 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 25 treesize of output 9 [2021-12-28 05:49:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:29,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:29,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245192421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:29,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:29,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 22 [2021-12-28 05:49:29,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309871292] [2021-12-28 05:49:29,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:29,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 05:49:29,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:29,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 05:49:29,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-12-28 05:49:29,073 INFO L87 Difference]: Start difference. First operand 1021 states and 1328 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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) [2021-12-28 05:49:29,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:29,403 INFO L93 Difference]: Finished difference Result 1108 states and 1391 transitions. [2021-12-28 05:49:29,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:49:29,403 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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 44 [2021-12-28 05:49:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:29,405 INFO L225 Difference]: With dead ends: 1108 [2021-12-28 05:49:29,405 INFO L226 Difference]: Without dead ends: 1108 [2021-12-28 05:49:29,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-12-28 05:49:29,405 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 603 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:29,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 1176 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 390 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2021-12-28 05:49:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-12-28 05:49:29,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1023. [2021-12-28 05:49:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 933 states have (on average 1.3054662379421222) internal successors, (1218), 953 states have internal predecessors, (1218), 37 states have call successors, (37), 13 states have call predecessors, (37), 26 states have return successors, (74), 56 states have call predecessors, (74), 37 states have call successors, (74) [2021-12-28 05:49:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1329 transitions. [2021-12-28 05:49:29,414 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1329 transitions. Word has length 44 [2021-12-28 05:49:29,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:29,414 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1329 transitions. [2021-12-28 05:49:29,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 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) [2021-12-28 05:49:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1329 transitions. [2021-12-28 05:49:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 05:49:29,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:29,415 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] [2021-12-28 05:49:29,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:29,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:29,633 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:29,633 INFO L85 PathProgramCache]: Analyzing trace with hash 492284805, now seen corresponding path program 1 times [2021-12-28 05:49:29,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:29,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782264168] [2021-12-28 05:49:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:29,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:30,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:30,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:30,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782264168] [2021-12-28 05:49:30,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782264168] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:30,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498271135] [2021-12-28 05:49:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:30,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:30,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:30,011 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) [2021-12-28 05:49:30,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 05:49:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:30,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-28 05:49:30,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:30,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-28 05:49:30,514 INFO L387 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 [2021-12-28 05:49:30,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:30,706 INFO L387 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 [2021-12-28 05:49:30,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:30,965 INFO L387 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 9 [2021-12-28 05:49:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:30,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:30,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498271135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:30,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:30,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 27 [2021-12-28 05:49:30,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677598081] [2021-12-28 05:49:30,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:30,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 05:49:30,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:30,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 05:49:30,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-12-28 05:49:30,973 INFO L87 Difference]: Start difference. First operand 1023 states and 1329 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-12-28 05:49:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:31,261 INFO L93 Difference]: Finished difference Result 1251 states and 1605 transitions. [2021-12-28 05:49:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 05:49:31,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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 44 [2021-12-28 05:49:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:31,263 INFO L225 Difference]: With dead ends: 1251 [2021-12-28 05:49:31,263 INFO L226 Difference]: Without dead ends: 1251 [2021-12-28 05:49:31,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-12-28 05:49:31,264 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 199 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:31,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 1109 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 284 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2021-12-28 05:49:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-12-28 05:49:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1171. [2021-12-28 05:49:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1066 states have (on average 1.3067542213883678) internal successors, (1393), 1093 states have internal predecessors, (1393), 46 states have call successors, (46), 16 states have call predecessors, (46), 32 states have return successors, (92), 61 states have call predecessors, (92), 46 states have call successors, (92) [2021-12-28 05:49:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1531 transitions. [2021-12-28 05:49:31,276 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1531 transitions. Word has length 44 [2021-12-28 05:49:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:31,276 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 1531 transitions. [2021-12-28 05:49:31,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-12-28 05:49:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1531 transitions. [2021-12-28 05:49:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 05:49:31,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:31,277 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] [2021-12-28 05:49:31,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:31,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-28 05:49:31,494 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:31,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:31,494 INFO L85 PathProgramCache]: Analyzing trace with hash 492284806, now seen corresponding path program 1 times [2021-12-28 05:49:31,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:31,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279583004] [2021-12-28 05:49:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:31,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:31,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:31,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:31,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279583004] [2021-12-28 05:49:31,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279583004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:31,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38752052] [2021-12-28 05:49:31,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:31,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:31,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:31,918 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) [2021-12-28 05:49:31,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 05:49:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:32,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-28 05:49:32,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:32,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-12-28 05:49:32,315 INFO L387 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 [2021-12-28 05:49:32,323 INFO L387 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 [2021-12-28 05:49:32,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:32,425 INFO L387 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 27 treesize of output 26 [2021-12-28 05:49:32,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:32,430 INFO L387 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 [2021-12-28 05:49:32,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-28 05:49:32,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 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 [2021-12-28 05:49:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:32,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38752052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:32,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:32,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 27 [2021-12-28 05:49:32,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154792197] [2021-12-28 05:49:32,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:32,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 05:49:32,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:32,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 05:49:32,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-12-28 05:49:32,605 INFO L87 Difference]: Start difference. First operand 1171 states and 1531 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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) [2021-12-28 05:49:33,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:33,379 INFO L93 Difference]: Finished difference Result 2118 states and 2763 transitions. [2021-12-28 05:49:33,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 05:49:33,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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 44 [2021-12-28 05:49:33,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:33,383 INFO L225 Difference]: With dead ends: 2118 [2021-12-28 05:49:33,383 INFO L226 Difference]: Without dead ends: 2118 [2021-12-28 05:49:33,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=375, Invalid=1347, Unknown=0, NotChecked=0, Total=1722 [2021-12-28 05:49:33,383 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 1179 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:33,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 1366 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-12-28 05:49:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1654. [2021-12-28 05:49:33,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1514 states have (on average 1.3262879788639366) internal successors, (2008), 1550 states have internal predecessors, (2008), 69 states have call successors, (69), 22 states have call predecessors, (69), 44 states have return successors, (138), 81 states have call predecessors, (138), 69 states have call successors, (138) [2021-12-28 05:49:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2215 transitions. [2021-12-28 05:49:33,400 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2215 transitions. Word has length 44 [2021-12-28 05:49:33,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:33,400 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 2215 transitions. [2021-12-28 05:49:33,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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) [2021-12-28 05:49:33,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2215 transitions. [2021-12-28 05:49:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 05:49:33,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:33,401 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] [2021-12-28 05:49:33,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:33,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-28 05:49:33,617 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:33,617 INFO L85 PathProgramCache]: Analyzing trace with hash -781098313, now seen corresponding path program 1 times [2021-12-28 05:49:33,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:33,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779275642] [2021-12-28 05:49:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:33,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:33,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:33,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:33,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779275642] [2021-12-28 05:49:33,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779275642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:33,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:33,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-28 05:49:33,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694845221] [2021-12-28 05:49:33,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:33,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 05:49:33,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:33,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 05:49:33,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:49:33,885 INFO L87 Difference]: Start difference. First operand 1654 states and 2215 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-12-28 05:49:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:34,656 INFO L93 Difference]: Finished difference Result 2135 states and 2809 transitions. [2021-12-28 05:49:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-28 05:49:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 44 [2021-12-28 05:49:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:34,659 INFO L225 Difference]: With dead ends: 2135 [2021-12-28 05:49:34,659 INFO L226 Difference]: Without dead ends: 2135 [2021-12-28 05:49:34,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 05:49:34,660 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 863 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:34,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1678 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:49:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-12-28 05:49:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1684. [2021-12-28 05:49:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1536 states have (on average 1.326171875) internal successors, (2037), 1576 states have internal predecessors, (2037), 69 states have call successors, (69), 26 states have call predecessors, (69), 52 states have return successors, (138), 81 states have call predecessors, (138), 69 states have call successors, (138) [2021-12-28 05:49:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2244 transitions. [2021-12-28 05:49:34,676 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2244 transitions. Word has length 44 [2021-12-28 05:49:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:34,677 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 2244 transitions. [2021-12-28 05:49:34,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-12-28 05:49:34,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2244 transitions. [2021-12-28 05:49:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 05:49:34,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:34,677 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] [2021-12-28 05:49:34,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-28 05:49:34,678 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:34,678 INFO L85 PathProgramCache]: Analyzing trace with hash -781098312, now seen corresponding path program 1 times [2021-12-28 05:49:34,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:34,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056634627] [2021-12-28 05:49:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:34,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:35,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:35,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:35,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056634627] [2021-12-28 05:49:35,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056634627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:35,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273615219] [2021-12-28 05:49:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:35,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:35,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:35,243 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:49:35,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 05:49:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:35,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-28 05:49:35,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:35,542 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 05:49:35,542 INFO L387 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 [2021-12-28 05:49:35,633 INFO L387 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 [2021-12-28 05:49:35,641 INFO L387 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 [2021-12-28 05:49:35,651 INFO L387 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 [2021-12-28 05:49:35,656 INFO L387 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 [2021-12-28 05:49:35,671 INFO L387 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 [2021-12-28 05:49:35,674 INFO L387 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 [2021-12-28 05:49:35,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:35,746 INFO L387 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 23 treesize of output 22 [2021-12-28 05:49:35,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:35,750 INFO L387 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 23 treesize of output 22 [2021-12-28 05:49:35,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:35,781 INFO L387 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 17 treesize of output 7 [2021-12-28 05:49:35,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:35,784 INFO L387 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 17 treesize of output 7 [2021-12-28 05:49:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:35,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:35,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273615219] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:35,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:35,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [17] total 25 [2021-12-28 05:49:35,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202862629] [2021-12-28 05:49:35,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:35,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:49:35,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:49:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-12-28 05:49:35,817 INFO L87 Difference]: Start difference. First operand 1684 states and 2244 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 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) [2021-12-28 05:49:36,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:36,120 INFO L93 Difference]: Finished difference Result 1697 states and 2257 transitions. [2021-12-28 05:49:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:49:36,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 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 44 [2021-12-28 05:49:36,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:36,123 INFO L225 Difference]: With dead ends: 1697 [2021-12-28 05:49:36,124 INFO L226 Difference]: Without dead ends: 1697 [2021-12-28 05:49:36,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-12-28 05:49:36,124 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 71 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:36,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 806 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-12-28 05:49:36,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1689. [2021-12-28 05:49:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1541 states have (on average 1.3251135626216743) internal successors, (2042), 1581 states have internal predecessors, (2042), 69 states have call successors, (69), 26 states have call predecessors, (69), 52 states have return successors, (138), 81 states have call predecessors, (138), 69 states have call successors, (138) [2021-12-28 05:49:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2249 transitions. [2021-12-28 05:49:36,153 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2249 transitions. Word has length 44 [2021-12-28 05:49:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:36,153 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 2249 transitions. [2021-12-28 05:49:36,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 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) [2021-12-28 05:49:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2249 transitions. [2021-12-28 05:49:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 05:49:36,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:36,154 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] [2021-12-28 05:49:36,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:36,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:36,371 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:36,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1503059700, now seen corresponding path program 1 times [2021-12-28 05:49:36,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:36,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290770170] [2021-12-28 05:49:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:36,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:36,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:36,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:36,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290770170] [2021-12-28 05:49:36,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290770170] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:36,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811382517] [2021-12-28 05:49:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:36,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:36,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:36,460 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:49:36,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 05:49:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:36,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-28 05:49:36,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:36,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:36,670 INFO L387 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 17 treesize of output 7 [2021-12-28 05:49:36,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:36,672 INFO L387 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 17 treesize of output 7 [2021-12-28 05:49:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:49:36,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:36,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811382517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:36,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:36,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-28 05:49:36,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832105997] [2021-12-28 05:49:36,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:36,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:49:36,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:36,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:49:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:49:36,739 INFO L87 Difference]: Start difference. First operand 1689 states and 2249 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) [2021-12-28 05:49:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:36,971 INFO L93 Difference]: Finished difference Result 1500 states and 1995 transitions. [2021-12-28 05:49:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:49:36,972 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 [2021-12-28 05:49:36,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:36,974 INFO L225 Difference]: With dead ends: 1500 [2021-12-28 05:49:36,974 INFO L226 Difference]: Without dead ends: 1500 [2021-12-28 05:49:36,975 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 [2021-12-28 05:49:36,976 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 200 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:36,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1080 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-12-28 05:49:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1283. [2021-12-28 05:49:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1169 states have (on average 1.3327630453378956) internal successors, (1558), 1200 states have internal predecessors, (1558), 51 states have call successors, (51), 18 states have call predecessors, (51), 36 states have return successors, (102), 64 states have call predecessors, (102), 51 states have call successors, (102) [2021-12-28 05:49:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1711 transitions. [2021-12-28 05:49:36,987 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1711 transitions. Word has length 45 [2021-12-28 05:49:36,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:36,988 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 1711 transitions. [2021-12-28 05:49:36,988 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) [2021-12-28 05:49:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1711 transitions. [2021-12-28 05:49:36,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 05:49:36,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:36,988 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] [2021-12-28 05:49:37,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:37,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-28 05:49:37,205 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:37,206 INFO L85 PathProgramCache]: Analyzing trace with hash 102761101, now seen corresponding path program 1 times [2021-12-28 05:49:37,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:37,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821443484] [2021-12-28 05:49:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:37,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:37,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:37,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821443484] [2021-12-28 05:49:37,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821443484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:37,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:37,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 05:49:37,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717591751] [2021-12-28 05:49:37,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:37,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:49:37,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:49:37,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:49:37,301 INFO L87 Difference]: Start difference. First operand 1283 states and 1711 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-12-28 05:49:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:37,470 INFO L93 Difference]: Finished difference Result 1589 states and 2087 transitions. [2021-12-28 05:49:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:49:37,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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 [2021-12-28 05:49:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:37,472 INFO L225 Difference]: With dead ends: 1589 [2021-12-28 05:49:37,472 INFO L226 Difference]: Without dead ends: 1589 [2021-12-28 05:49:37,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-12-28 05:49:37,472 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 923 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:37,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 1093 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-12-28 05:49:37,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1274. [2021-12-28 05:49:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1160 states have (on average 1.328448275862069) internal successors, (1541), 1191 states have internal predecessors, (1541), 51 states have call successors, (51), 18 states have call predecessors, (51), 36 states have return successors, (102), 64 states have call predecessors, (102), 51 states have call successors, (102) [2021-12-28 05:49:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1694 transitions. [2021-12-28 05:49:37,494 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1694 transitions. Word has length 45 [2021-12-28 05:49:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:37,494 INFO L470 AbstractCegarLoop]: Abstraction has 1274 states and 1694 transitions. [2021-12-28 05:49:37,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-12-28 05:49:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1694 transitions. [2021-12-28 05:49:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 05:49:37,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:37,495 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] [2021-12-28 05:49:37,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-28 05:49:37,495 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:37,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1861783222, now seen corresponding path program 1 times [2021-12-28 05:49:37,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:37,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663501104] [2021-12-28 05:49:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:37,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:37,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:37,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:37,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663501104] [2021-12-28 05:49:37,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663501104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:37,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574310791] [2021-12-28 05:49:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:37,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:37,675 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:49:37,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 05:49:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:37,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-28 05:49:37,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:38,145 INFO L387 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 [2021-12-28 05:49:38,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:38,292 INFO L387 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 24 treesize of output 8 [2021-12-28 05:49:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:38,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:38,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574310791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:38,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:38,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 21 [2021-12-28 05:49:38,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977848212] [2021-12-28 05:49:38,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:38,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 05:49:38,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 05:49:38,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:49:38,300 INFO L87 Difference]: Start difference. First operand 1274 states and 1694 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-12-28 05:49:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:38,494 INFO L93 Difference]: Finished difference Result 1351 states and 1770 transitions. [2021-12-28 05:49:38,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:49:38,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 [2021-12-28 05:49:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:38,496 INFO L225 Difference]: With dead ends: 1351 [2021-12-28 05:49:38,496 INFO L226 Difference]: Without dead ends: 1351 [2021-12-28 05:49:38,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-12-28 05:49:38,497 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 472 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:38,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 1039 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 191 Invalid, 0 Unknown, 104 Unchecked, 0.1s Time] [2021-12-28 05:49:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-12-28 05:49:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1277. [2021-12-28 05:49:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1163 states have (on average 1.3276010318142735) internal successors, (1544), 1194 states have internal predecessors, (1544), 51 states have call successors, (51), 18 states have call predecessors, (51), 36 states have return successors, (102), 64 states have call predecessors, (102), 51 states have call successors, (102) [2021-12-28 05:49:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1697 transitions. [2021-12-28 05:49:38,528 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1697 transitions. Word has length 45 [2021-12-28 05:49:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:38,528 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 1697 transitions. [2021-12-28 05:49:38,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-12-28 05:49:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1697 transitions. [2021-12-28 05:49:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 05:49:38,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:38,529 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] [2021-12-28 05:49:38,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-28 05:49:38,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:38,745 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1919041524, now seen corresponding path program 1 times [2021-12-28 05:49:38,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:38,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613551123] [2021-12-28 05:49:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:38,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:39,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:39,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:39,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613551123] [2021-12-28 05:49:39,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613551123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:39,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:39,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-28 05:49:39,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927001254] [2021-12-28 05:49:39,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:39,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 05:49:39,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:39,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 05:49:39,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:49:39,188 INFO L87 Difference]: Start difference. First operand 1277 states and 1697 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-12-28 05:49:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:39,815 INFO L93 Difference]: Finished difference Result 1714 states and 2214 transitions. [2021-12-28 05:49:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 05:49:39,817 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 [2021-12-28 05:49:39,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:39,819 INFO L225 Difference]: With dead ends: 1714 [2021-12-28 05:49:39,819 INFO L226 Difference]: Without dead ends: 1714 [2021-12-28 05:49:39,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=664, Unknown=0, NotChecked=0, Total=930 [2021-12-28 05:49:39,819 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 1488 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:39,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1481 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:39,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-12-28 05:49:39,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1274. [2021-12-28 05:49:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1160 states have (on average 1.3267241379310344) internal successors, (1539), 1191 states have internal predecessors, (1539), 51 states have call successors, (51), 18 states have call predecessors, (51), 36 states have return successors, (102), 64 states have call predecessors, (102), 51 states have call successors, (102) [2021-12-28 05:49:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1692 transitions. [2021-12-28 05:49:39,835 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1692 transitions. Word has length 45 [2021-12-28 05:49:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:39,835 INFO L470 AbstractCegarLoop]: Abstraction has 1274 states and 1692 transitions. [2021-12-28 05:49:39,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2021-12-28 05:49:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1692 transitions. [2021-12-28 05:49:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 05:49:39,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:39,836 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] [2021-12-28 05:49:39,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-28 05:49:39,836 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:39,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1990296656, now seen corresponding path program 1 times [2021-12-28 05:49:39,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:39,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465193578] [2021-12-28 05:49:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:39,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:40,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:40,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:40,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465193578] [2021-12-28 05:49:40,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465193578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:40,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:40,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-28 05:49:40,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388416312] [2021-12-28 05:49:40,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:40,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 05:49:40,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:40,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 05:49:40,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:49:40,333 INFO L87 Difference]: Start difference. First operand 1274 states and 1692 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-12-28 05:49:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:41,163 INFO L93 Difference]: Finished difference Result 1907 states and 2495 transitions. [2021-12-28 05:49:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 05:49:41,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 [2021-12-28 05:49:41,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:41,165 INFO L225 Difference]: With dead ends: 1907 [2021-12-28 05:49:41,165 INFO L226 Difference]: Without dead ends: 1907 [2021-12-28 05:49:41,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-12-28 05:49:41,166 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 1174 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:41,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 1520 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:49:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-12-28 05:49:41,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1457. [2021-12-28 05:49:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1327 states have (on average 1.345139412207988) internal successors, (1785), 1362 states have internal predecessors, (1785), 59 states have call successors, (59), 22 states have call predecessors, (59), 44 states have return successors, (118), 72 states have call predecessors, (118), 59 states have call successors, (118) [2021-12-28 05:49:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1962 transitions. [2021-12-28 05:49:41,179 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1962 transitions. Word has length 45 [2021-12-28 05:49:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:41,180 INFO L470 AbstractCegarLoop]: Abstraction has 1457 states and 1962 transitions. [2021-12-28 05:49:41,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-12-28 05:49:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1962 transitions. [2021-12-28 05:49:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 05:49:41,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:41,181 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] [2021-12-28 05:49:41,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-28 05:49:41,181 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:41,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1988449613, now seen corresponding path program 1 times [2021-12-28 05:49:41,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:41,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036765234] [2021-12-28 05:49:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:41,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:41,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:41,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:41,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036765234] [2021-12-28 05:49:41,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036765234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:41,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:41,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-28 05:49:41,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221085514] [2021-12-28 05:49:41,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:41,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:49:41,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:41,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:49:41,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:49:41,392 INFO L87 Difference]: Start difference. First operand 1457 states and 1962 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 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) [2021-12-28 05:49:42,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:42,071 INFO L93 Difference]: Finished difference Result 2062 states and 2751 transitions. [2021-12-28 05:49:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 05:49:42,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 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 [2021-12-28 05:49:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:42,075 INFO L225 Difference]: With dead ends: 2062 [2021-12-28 05:49:42,075 INFO L226 Difference]: Without dead ends: 2062 [2021-12-28 05:49:42,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2021-12-28 05:49:42,076 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 718 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:42,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 1150 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-12-28 05:49:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1711. [2021-12-28 05:49:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1554 states have (on average 1.3404118404118404) internal successors, (2083), 1598 states have internal predecessors, (2083), 74 states have call successors, (74), 28 states have call predecessors, (74), 56 states have return successors, (148), 84 states have call predecessors, (148), 74 states have call successors, (148) [2021-12-28 05:49:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2305 transitions. [2021-12-28 05:49:42,096 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2305 transitions. Word has length 45 [2021-12-28 05:49:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:42,097 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 2305 transitions. [2021-12-28 05:49:42,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 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) [2021-12-28 05:49:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2305 transitions. [2021-12-28 05:49:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 05:49:42,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:42,098 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] [2021-12-28 05:49:42,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-28 05:49:42,098 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:42,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1988449614, now seen corresponding path program 1 times [2021-12-28 05:49:42,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:42,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979146439] [2021-12-28 05:49:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:42,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:42,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:42,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:42,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979146439] [2021-12-28 05:49:42,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979146439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:42,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:42,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-28 05:49:42,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17048942] [2021-12-28 05:49:42,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:42,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 05:49:42,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:42,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 05:49:42,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:49:42,357 INFO L87 Difference]: Start difference. First operand 1711 states and 2305 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 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) [2021-12-28 05:49:42,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:42,880 INFO L93 Difference]: Finished difference Result 2105 states and 2787 transitions. [2021-12-28 05:49:42,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 05:49:42,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 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 [2021-12-28 05:49:42,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:42,883 INFO L225 Difference]: With dead ends: 2105 [2021-12-28 05:49:42,883 INFO L226 Difference]: Without dead ends: 2105 [2021-12-28 05:49:42,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-12-28 05:49:42,884 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 676 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:42,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 774 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-12-28 05:49:42,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1887. [2021-12-28 05:49:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1714 states have (on average 1.352975495915986) internal successors, (2319), 1762 states have internal predecessors, (2319), 82 states have call successors, (82), 32 states have call predecessors, (82), 64 states have return successors, (164), 92 states have call predecessors, (164), 82 states have call successors, (164) [2021-12-28 05:49:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2565 transitions. [2021-12-28 05:49:42,901 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2565 transitions. Word has length 45 [2021-12-28 05:49:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:42,901 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 2565 transitions. [2021-12-28 05:49:42,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 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) [2021-12-28 05:49:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2565 transitions. [2021-12-28 05:49:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 05:49:42,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:42,902 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] [2021-12-28 05:49:42,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-28 05:49:42,902 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1569652866, now seen corresponding path program 1 times [2021-12-28 05:49:42,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:42,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072871973] [2021-12-28 05:49:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:42,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:43,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:43,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:43,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072871973] [2021-12-28 05:49:43,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072871973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:43,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:43,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-28 05:49:43,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055247307] [2021-12-28 05:49:43,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:43,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 05:49:43,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:43,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 05:49:43,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:49:43,113 INFO L87 Difference]: Start difference. First operand 1887 states and 2565 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 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) [2021-12-28 05:49:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:43,824 INFO L93 Difference]: Finished difference Result 3140 states and 4148 transitions. [2021-12-28 05:49:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-28 05:49:43,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 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 46 [2021-12-28 05:49:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:43,830 INFO L225 Difference]: With dead ends: 3140 [2021-12-28 05:49:43,830 INFO L226 Difference]: Without dead ends: 3140 [2021-12-28 05:49:43,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-12-28 05:49:43,831 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 857 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:43,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1866 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:49:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2021-12-28 05:49:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 2531. [2021-12-28 05:49:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2272 states have (on average 1.357394366197183) internal successors, (3084), 2353 states have internal predecessors, (3084), 122 states have call successors, (122), 55 states have call predecessors, (122), 110 states have return successors, (244), 122 states have call predecessors, (244), 122 states have call successors, (244) [2021-12-28 05:49:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 3450 transitions. [2021-12-28 05:49:43,861 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 3450 transitions. Word has length 46 [2021-12-28 05:49:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:43,862 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 3450 transitions. [2021-12-28 05:49:43,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 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) [2021-12-28 05:49:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 3450 transitions. [2021-12-28 05:49:43,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 05:49:43,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:43,862 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] [2021-12-28 05:49:43,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-28 05:49:43,863 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:43,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1512394564, now seen corresponding path program 1 times [2021-12-28 05:49:43,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114116813] [2021-12-28 05:49:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:43,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:44,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:44,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:44,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114116813] [2021-12-28 05:49:44,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114116813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:44,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:44,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-28 05:49:44,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903095272] [2021-12-28 05:49:44,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:44,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:49:44,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:44,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:49:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:49:44,093 INFO L87 Difference]: Start difference. First operand 2531 states and 3450 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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) [2021-12-28 05:49:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:44,660 INFO L93 Difference]: Finished difference Result 2750 states and 3673 transitions. [2021-12-28 05:49:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 05:49:44,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 46 [2021-12-28 05:49:44,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:44,664 INFO L225 Difference]: With dead ends: 2750 [2021-12-28 05:49:44,664 INFO L226 Difference]: Without dead ends: 2750 [2021-12-28 05:49:44,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2021-12-28 05:49:44,664 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 771 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:44,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 1063 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-12-28 05:49:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2529. [2021-12-28 05:49:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2270 states have (on average 1.3572687224669604) internal successors, (3081), 2351 states have internal predecessors, (3081), 122 states have call successors, (122), 55 states have call predecessors, (122), 110 states have return successors, (244), 122 states have call predecessors, (244), 122 states have call successors, (244) [2021-12-28 05:49:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 3447 transitions. [2021-12-28 05:49:44,690 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 3447 transitions. Word has length 46 [2021-12-28 05:49:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:44,690 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 3447 transitions. [2021-12-28 05:49:44,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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) [2021-12-28 05:49:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 3447 transitions. [2021-12-28 05:49:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-28 05:49:44,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:44,691 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] [2021-12-28 05:49:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-28 05:49:44,691 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1829142158, now seen corresponding path program 1 times [2021-12-28 05:49:44,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:44,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352856840] [2021-12-28 05:49:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:44,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:44,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:44,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:44,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352856840] [2021-12-28 05:49:44,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352856840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:44,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325775372] [2021-12-28 05:49:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:44,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:44,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:44,874 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:49:44,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 05:49:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-28 05:49:44,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:45,301 INFO L387 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 [2021-12-28 05:49:45,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:45,453 INFO L387 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 23 treesize of output 7 [2021-12-28 05:49:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:45,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:45,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325775372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:45,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:45,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2021-12-28 05:49:45,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311782596] [2021-12-28 05:49:45,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:45,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 05:49:45,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:45,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 05:49:45,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:49:45,472 INFO L87 Difference]: Start difference. First operand 2529 states and 3447 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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) [2021-12-28 05:49:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:45,707 INFO L93 Difference]: Finished difference Result 2613 states and 3524 transitions. [2021-12-28 05:49:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:49:45,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 47 [2021-12-28 05:49:45,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:45,711 INFO L225 Difference]: With dead ends: 2613 [2021-12-28 05:49:45,711 INFO L226 Difference]: Without dead ends: 2613 [2021-12-28 05:49:45,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-12-28 05:49:45,712 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 447 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:45,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 1087 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 263 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2021-12-28 05:49:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-12-28 05:49:45,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2540. [2021-12-28 05:49:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2281 states have (on average 1.356422621657168) internal successors, (3094), 2362 states have internal predecessors, (3094), 122 states have call successors, (122), 55 states have call predecessors, (122), 110 states have return successors, (244), 122 states have call predecessors, (244), 122 states have call successors, (244) [2021-12-28 05:49:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 3460 transitions. [2021-12-28 05:49:45,739 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 3460 transitions. Word has length 47 [2021-12-28 05:49:45,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:45,739 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 3460 transitions. [2021-12-28 05:49:45,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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) [2021-12-28 05:49:45,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 3460 transitions. [2021-12-28 05:49:45,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-28 05:49:45,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:45,741 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] [2021-12-28 05:49:45,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:45,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-12-28 05:49:45,958 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:45,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1656478512, now seen corresponding path program 1 times [2021-12-28 05:49:45,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:45,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437431735] [2021-12-28 05:49:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:45,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:46,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:46,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:46,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437431735] [2021-12-28 05:49:46,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437431735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:46,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143853161] [2021-12-28 05:49:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:46,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:46,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:46,272 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:49:46,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 05:49:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:46,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-28 05:49:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:46,663 INFO L387 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 [2021-12-28 05:49:46,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:46,737 INFO L387 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 27 treesize of output 26 [2021-12-28 05:49:46,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 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 [2021-12-28 05:49:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:46,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:46,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143853161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:46,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:46,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 25 [2021-12-28 05:49:46,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474925289] [2021-12-28 05:49:46,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:46,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 05:49:46,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 05:49:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-12-28 05:49:46,828 INFO L87 Difference]: Start difference. First operand 2540 states and 3460 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 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) [2021-12-28 05:49:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:47,360 INFO L93 Difference]: Finished difference Result 2995 states and 4001 transitions. [2021-12-28 05:49:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-28 05:49:47,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 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 47 [2021-12-28 05:49:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:47,389 INFO L225 Difference]: With dead ends: 2995 [2021-12-28 05:49:47,390 INFO L226 Difference]: Without dead ends: 2995 [2021-12-28 05:49:47,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=429, Invalid=1551, Unknown=0, NotChecked=0, Total=1980 [2021-12-28 05:49:47,390 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 1299 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:47,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1303 Valid, 1275 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-12-28 05:49:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2547. [2021-12-28 05:49:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2288 states have (on average 1.3566433566433567) internal successors, (3104), 2369 states have internal predecessors, (3104), 122 states have call successors, (122), 55 states have call predecessors, (122), 110 states have return successors, (244), 122 states have call predecessors, (244), 122 states have call successors, (244) [2021-12-28 05:49:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 3470 transitions. [2021-12-28 05:49:47,444 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 3470 transitions. Word has length 47 [2021-12-28 05:49:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:47,444 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 3470 transitions. [2021-12-28 05:49:47,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 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) [2021-12-28 05:49:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 3470 transitions. [2021-12-28 05:49:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-28 05:49:47,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:47,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:47,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-28 05:49:47,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:47,647 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:47,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:47,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1323444049, now seen corresponding path program 1 times [2021-12-28 05:49:47,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:47,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129284907] [2021-12-28 05:49:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:47,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:47,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:47,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 05:49:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 05:49:47,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:47,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129284907] [2021-12-28 05:49:47,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129284907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:47,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:47,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:49:47,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933753527] [2021-12-28 05:49:47,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:47,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:47,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:47,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:47,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:47,699 INFO L87 Difference]: Start difference. First operand 2547 states and 3470 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-12-28 05:49:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:47,721 INFO L93 Difference]: Finished difference Result 2797 states and 3782 transitions. [2021-12-28 05:49:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:49:47,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 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 48 [2021-12-28 05:49:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:47,724 INFO L225 Difference]: With dead ends: 2797 [2021-12-28 05:49:47,724 INFO L226 Difference]: Without dead ends: 2797 [2021-12-28 05:49:47,724 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 [2021-12-28 05:49:47,724 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 215 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 315 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 [2021-12-28 05:49:47,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 315 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:47,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-12-28 05:49:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2546. [2021-12-28 05:49:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2288 states have (on average 1.347027972027972) internal successors, (3082), 2368 states have internal predecessors, (3082), 122 states have call successors, (122), 55 states have call predecessors, (122), 110 states have return successors, (244), 122 states have call predecessors, (244), 122 states have call successors, (244) [2021-12-28 05:49:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3448 transitions. [2021-12-28 05:49:47,746 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3448 transitions. Word has length 48 [2021-12-28 05:49:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:47,747 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 3448 transitions. [2021-12-28 05:49:47,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-12-28 05:49:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3448 transitions. [2021-12-28 05:49:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-28 05:49:47,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:47,748 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] [2021-12-28 05:49:47,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-28 05:49:47,748 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1922907279, now seen corresponding path program 1 times [2021-12-28 05:49:47,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:47,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510854058] [2021-12-28 05:49:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:47,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:48,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:48,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 05:49:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:49:48,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:48,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510854058] [2021-12-28 05:49:48,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510854058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:48,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:48,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-28 05:49:48,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917652231] [2021-12-28 05:49:48,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:48,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 05:49:48,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:48,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 05:49:48,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:49:48,438 INFO L87 Difference]: Start difference. First operand 2546 states and 3448 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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) [2021-12-28 05:49:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:50,246 INFO L93 Difference]: Finished difference Result 3637 states and 4792 transitions. [2021-12-28 05:49:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-28 05:49:50,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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 49 [2021-12-28 05:49:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:50,256 INFO L225 Difference]: With dead ends: 3637 [2021-12-28 05:49:50,256 INFO L226 Difference]: Without dead ends: 3635 [2021-12-28 05:49:50,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=889, Invalid=2651, Unknown=0, NotChecked=0, Total=3540 [2021-12-28 05:49:50,257 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 2422 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:50,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 2391 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 05:49:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2021-12-28 05:49:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 2511. [2021-12-28 05:49:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2511 states, 2255 states have (on average 1.3432372505543237) internal successors, (3029), 2335 states have internal predecessors, (3029), 120 states have call successors, (120), 55 states have call predecessors, (120), 110 states have return successors, (240), 120 states have call predecessors, (240), 120 states have call successors, (240) [2021-12-28 05:49:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 3389 transitions. [2021-12-28 05:49:50,292 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 3389 transitions. Word has length 49 [2021-12-28 05:49:50,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:50,292 INFO L470 AbstractCegarLoop]: Abstraction has 2511 states and 3389 transitions. [2021-12-28 05:49:50,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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) [2021-12-28 05:49:50,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 3389 transitions. [2021-12-28 05:49:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-28 05:49:50,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:50,293 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] [2021-12-28 05:49:50,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-28 05:49:50,293 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:50,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash 904339398, now seen corresponding path program 1 times [2021-12-28 05:49:50,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:50,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933607428] [2021-12-28 05:49:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:50,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:50,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:50,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:50,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933607428] [2021-12-28 05:49:50,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933607428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:50,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:50,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-28 05:49:50,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709324759] [2021-12-28 05:49:50,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:50,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 05:49:50,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:50,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 05:49:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-28 05:49:50,738 INFO L87 Difference]: Start difference. First operand 2511 states and 3389 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-12-28 05:49:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:51,809 INFO L93 Difference]: Finished difference Result 2965 states and 3925 transitions. [2021-12-28 05:49:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-28 05:49:51,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 [2021-12-28 05:49:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:51,814 INFO L225 Difference]: With dead ends: 2965 [2021-12-28 05:49:51,814 INFO L226 Difference]: Without dead ends: 2965 [2021-12-28 05:49:51,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2021-12-28 05:49:51,814 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 1090 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:51,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 1992 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 05:49:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-12-28 05:49:51,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2507. [2021-12-28 05:49:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2251 states have (on average 1.3429586850288762) internal successors, (3023), 2331 states have internal predecessors, (3023), 120 states have call successors, (120), 55 states have call predecessors, (120), 110 states have return successors, (240), 120 states have call predecessors, (240), 120 states have call successors, (240) [2021-12-28 05:49:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 3383 transitions. [2021-12-28 05:49:51,842 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 3383 transitions. Word has length 48 [2021-12-28 05:49:51,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:51,842 INFO L470 AbstractCegarLoop]: Abstraction has 2507 states and 3383 transitions. [2021-12-28 05:49:51,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-12-28 05:49:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 3383 transitions. [2021-12-28 05:49:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-28 05:49:51,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:51,843 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] [2021-12-28 05:49:51,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-28 05:49:51,843 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:51,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1713686024, now seen corresponding path program 1 times [2021-12-28 05:49:51,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:51,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740242513] [2021-12-28 05:49:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:51,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:52,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:52,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:52,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740242513] [2021-12-28 05:49:52,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740242513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:52,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:52,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-28 05:49:52,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70076211] [2021-12-28 05:49:52,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:52,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:49:52,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:52,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:49:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:49:52,067 INFO L87 Difference]: Start difference. First operand 2507 states and 3383 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 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) [2021-12-28 05:49:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:52,791 INFO L93 Difference]: Finished difference Result 2713 states and 3592 transitions. [2021-12-28 05:49:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 05:49:52,792 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 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 [2021-12-28 05:49:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:52,795 INFO L225 Difference]: With dead ends: 2713 [2021-12-28 05:49:52,795 INFO L226 Difference]: Without dead ends: 2713 [2021-12-28 05:49:52,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=481, Unknown=0, NotChecked=0, Total=702 [2021-12-28 05:49:52,796 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 668 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:52,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 974 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-28 05:49:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2494. [2021-12-28 05:49:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2238 states have (on average 1.3436103663985701) internal successors, (3007), 2318 states have internal predecessors, (3007), 120 states have call successors, (120), 55 states have call predecessors, (120), 110 states have return successors, (240), 120 states have call predecessors, (240), 120 states have call successors, (240) [2021-12-28 05:49:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3367 transitions. [2021-12-28 05:49:52,822 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3367 transitions. Word has length 48 [2021-12-28 05:49:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:52,822 INFO L470 AbstractCegarLoop]: Abstraction has 2494 states and 3367 transitions. [2021-12-28 05:49:52,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 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) [2021-12-28 05:49:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3367 transitions. [2021-12-28 05:49:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 05:49:52,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:52,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:52,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-28 05:49:52,823 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:49:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:52,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1600129367, now seen corresponding path program 1 times [2021-12-28 05:49:52,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:52,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277120612] [2021-12-28 05:49:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:52,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:53,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:53,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-28 05:49:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:49:53,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:53,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277120612] [2021-12-28 05:49:53,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277120612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:53,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701665018] [2021-12-28 05:49:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:53,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:53,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:49:53,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 05:49:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-28 05:49:53,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:54,009 INFO L387 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 [2021-12-28 05:49:54,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:54,052 INFO L387 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 30 treesize of output 23 [2021-12-28 05:49:54,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:54,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:54,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:54,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:49:54,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2021-12-28 05:49:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:54,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:49:54,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 106 [2021-12-28 05:49:54,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:54,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 82 [2021-12-28 05:49:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:49:55,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701665018] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:49:55,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:49:55,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 19] total 52 [2021-12-28 05:49:55,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108362443] [2021-12-28 05:49:55,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:49:55,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-28 05:49:55,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-28 05:49:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2471, Unknown=0, NotChecked=0, Total=2652 [2021-12-28 05:49:55,436 INFO L87 Difference]: Start difference. First operand 2494 states and 3367 transitions. Second operand has 52 states, 52 states have (on average 2.5) internal successors, (130), 49 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 05:50:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:01,512 INFO L93 Difference]: Finished difference Result 5153 states and 6862 transitions. [2021-12-28 05:50:01,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-28 05:50:01,512 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5) internal successors, (130), 49 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-12-28 05:50:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:01,519 INFO L225 Difference]: With dead ends: 5153 [2021-12-28 05:50:01,519 INFO L226 Difference]: Without dead ends: 5149 [2021-12-28 05:50:01,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2173, Invalid=9817, Unknown=0, NotChecked=0, Total=11990 [2021-12-28 05:50:01,520 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 5297 mSDsluCounter, 8309 mSDsCounter, 0 mSdLazyCounter, 4370 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5297 SdHoareTripleChecker+Valid, 8676 SdHoareTripleChecker+Invalid, 4902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 4370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:01,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5297 Valid, 8676 Invalid, 4902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 4370 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-28 05:50:01,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5149 states. [2021-12-28 05:50:01,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5149 to 2167. [2021-12-28 05:50:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 1951 states have (on average 1.3305996924654024) internal successors, (2596), 2015 states have internal predecessors, (2596), 100 states have call successors, (100), 45 states have call predecessors, (100), 90 states have return successors, (200), 106 states have call predecessors, (200), 100 states have call successors, (200) [2021-12-28 05:50:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 2896 transitions. [2021-12-28 05:50:01,561 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 2896 transitions. Word has length 50 [2021-12-28 05:50:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:01,562 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 2896 transitions. [2021-12-28 05:50:01,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5) internal successors, (130), 49 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 05:50:01,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 2896 transitions. [2021-12-28 05:50:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 05:50:01,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:01,563 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:01,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:01,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-28 05:50:01,780 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:50:01,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1724221356, now seen corresponding path program 1 times [2021-12-28 05:50:01,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:01,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985731797] [2021-12-28 05:50:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:01,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:02,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:50:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:50:02,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:02,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985731797] [2021-12-28 05:50:02,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985731797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:02,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277491391] [2021-12-28 05:50:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:02,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:02,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:02,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:50:02,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 05:50:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:02,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-28 05:50:02,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:02,529 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 05:50:02,529 INFO L387 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 [2021-12-28 05:50:02,647 INFO L387 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 [2021-12-28 05:50:02,652 INFO L387 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 [2021-12-28 05:50:02,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:02,697 INFO L387 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 21 treesize of output 20 [2021-12-28 05:50:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:02,701 INFO L387 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 21 treesize of output 20 [2021-12-28 05:50:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:02,904 INFO L387 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 16 treesize of output 18 [2021-12-28 05:50:02,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:02,908 INFO L387 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 16 treesize of output 18 [2021-12-28 05:50:03,016 INFO L387 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 25 treesize of output 24 [2021-12-28 05:50:03,019 INFO L387 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 24 treesize of output 26 [2021-12-28 05:50:03,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:50:03,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:03,397 INFO L353 Elim1Store]: treesize reduction 31, result has 20.5 percent of original size [2021-12-28 05:50:03,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 45 [2021-12-28 05:50:03,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:03,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-28 05:50:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:50:03,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:03,586 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1436 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1436) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_append_one_~item~1#1.base|)) |c_~#list~0.base|) (+ |c_~#list~0.offset| 4))) 0) 0)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_append_one_~item~1#1.base|)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) (+ |c_~#list~0.offset| 4)))) 0) 0)) is different from false [2021-12-28 05:50:03,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:03,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 26 treesize of output 30 [2021-12-28 05:50:03,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:03,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 33 treesize of output 30 [2021-12-28 05:50:04,026 INFO L353 Elim1Store]: treesize reduction 26, result has 53.6 percent of original size [2021-12-28 05:50:04,026 INFO L387 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 66 [2021-12-28 05:50:04,040 INFO L353 Elim1Store]: treesize reduction 26, result has 53.6 percent of original size [2021-12-28 05:50:04,040 INFO L387 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 49 [2021-12-28 05:50:04,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:04,049 INFO L387 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 62 [2021-12-28 05:50:04,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:04,070 INFO L387 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 111 [2021-12-28 05:50:04,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:04,083 INFO L387 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 72 treesize of output 64 [2021-12-28 05:50:04,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-12-28 05:50:04,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:50:04,751 INFO L353 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2021-12-28 05:50:04,751 INFO L387 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 1 [2021-12-28 05:50:05,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277491391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:05,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:50:05,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2021-12-28 05:50:05,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355001816] [2021-12-28 05:50:05,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:05,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-28 05:50:05,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-28 05:50:05,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2003, Unknown=15, NotChecked=90, Total=2256 [2021-12-28 05:50:05,227 INFO L87 Difference]: Start difference. First operand 2167 states and 2896 transitions. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 05:50:09,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:09,196 INFO L93 Difference]: Finished difference Result 6333 states and 8435 transitions. [2021-12-28 05:50:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-28 05:50:09,196 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-12-28 05:50:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:09,204 INFO L225 Difference]: With dead ends: 6333 [2021-12-28 05:50:09,205 INFO L226 Difference]: Without dead ends: 6333 [2021-12-28 05:50:09,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1176, Invalid=6823, Unknown=15, NotChecked=176, Total=8190 [2021-12-28 05:50:09,206 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 4548 mSDsluCounter, 6100 mSDsCounter, 0 mSdLazyCounter, 3138 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4550 SdHoareTripleChecker+Valid, 6357 SdHoareTripleChecker+Invalid, 4183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 3138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:09,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4550 Valid, 6357 Invalid, 4183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 3138 Invalid, 0 Unknown, 583 Unchecked, 1.5s Time] [2021-12-28 05:50:09,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6333 states. [2021-12-28 05:50:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6333 to 3796. [2021-12-28 05:50:09,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3436 states have (on average 1.3338183934807917) internal successors, (4583), 3539 states have internal predecessors, (4583), 186 states have call successors, (186), 74 states have call predecessors, (186), 148 states have return successors, (372), 182 states have call predecessors, (372), 186 states have call successors, (372) [2021-12-28 05:50:09,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 5141 transitions. [2021-12-28 05:50:09,257 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 5141 transitions. Word has length 50 [2021-12-28 05:50:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:09,257 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 5141 transitions. [2021-12-28 05:50:09,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 05:50:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 5141 transitions. [2021-12-28 05:50:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 05:50:09,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:09,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:09,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:09,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-28 05:50:09,475 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 53 more)] === [2021-12-28 05:50:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:09,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1023156778, now seen corresponding path program 1 times [2021-12-28 05:50:09,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:09,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813641009] [2021-12-28 05:50:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:09,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:10,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:50:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:50:10,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813641009] [2021-12-28 05:50:10,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813641009] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408059958] [2021-12-28 05:50:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:10,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:10,983 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:50:10,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 05:50:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:11,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-28 05:50:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:11,323 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 05:50:11,323 INFO L387 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