./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/add_last-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/add_last-alloca-1.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 870a7e5617be5a547f8d530603b5c27ad6cbb74bb05a83654285fee7bbb92753 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:35:23,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:35:23,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:35:23,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:35:23,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:35:23,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:35:23,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:35:23,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:35:23,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:35:23,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:35:23,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:35:23,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:35:23,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:35:23,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:35:23,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:35:23,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:35:23,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:35:23,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:35:23,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:35:23,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:35:23,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:35:23,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:35:23,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:35:23,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:35:23,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:35:23,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:35:23,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:35:23,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:35:23,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:35:23,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:35:23,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:35:23,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:35:23,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:35:23,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:35:23,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:35:23,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:35:23,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:35:23,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:35:23,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:35:23,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:35:23,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:35:23,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:35:23,214 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:35:23,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:35:23,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:35:23,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:35:23,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:35:23,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:35:23,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:35:23,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:35:23,217 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:35:23,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:35:23,218 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:35:23,218 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:35:23,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:35:23,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:35:23,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:35:23,219 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:35:23,219 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:35:23,219 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:35:23,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:35:23,220 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:35:23,220 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:35:23,220 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:35:23,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:35:23,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:35:23,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:35:23,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:23,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:35:23,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:35:23,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:35:23,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:35:23,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:35:23,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870a7e5617be5a547f8d530603b5c27ad6cbb74bb05a83654285fee7bbb92753 [2021-12-18 19:35:23,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:35:23,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:35:23,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:35:23,486 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:35:23,487 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:35:23,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/add_last-alloca-1.i [2021-12-18 19:35:23,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e4a761a/74bc6c26557c445097d3e6eb81b9b5a8/FLAGbb51f0e1a [2021-12-18 19:35:23,970 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:35:23,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/add_last-alloca-1.i [2021-12-18 19:35:23,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e4a761a/74bc6c26557c445097d3e6eb81b9b5a8/FLAGbb51f0e1a [2021-12-18 19:35:24,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24e4a761a/74bc6c26557c445097d3e6eb81b9b5a8 [2021-12-18 19:35:24,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:35:24,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:35:24,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:24,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:35:24,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:35:24,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@332b02c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24, skipping insertion in model container [2021-12-18 19:35:24,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:35:24,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:35:24,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:24,289 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:35:24,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:24,375 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:35:24,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24 WrapperNode [2021-12-18 19:35:24,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:24,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:24,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:35:24,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:35:24,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,435 INFO L137 Inliner]: procedures = 115, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2021-12-18 19:35:24,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:24,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:35:24,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:35:24,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:35:24,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:35:24,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:35:24,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:35:24,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:35:24,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:24,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:24,499 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) [2021-12-18 19:35:24,501 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 [2021-12-18 19:35:24,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:35:24,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 19:35:24,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 19:35:24,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:35:24,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:35:24,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:35:24,593 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:35:24,594 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:35:24,748 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:35:24,754 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:35:24,754 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 19:35:24,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:24 BoogieIcfgContainer [2021-12-18 19:35:24,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:35:24,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:35:24,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:35:24,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:35:24,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:35:24" (1/3) ... [2021-12-18 19:35:24,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53972f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:24, skipping insertion in model container [2021-12-18 19:35:24,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (2/3) ... [2021-12-18 19:35:24,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53972f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:24, skipping insertion in model container [2021-12-18 19:35:24,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:24" (3/3) ... [2021-12-18 19:35:24,775 INFO L111 eAbstractionObserver]: Analyzing ICFG add_last-alloca-1.i [2021-12-18 19:35:24,779 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:35:24,779 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-18 19:35:24,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:35:24,818 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 [2021-12-18 19:35:24,818 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-18 19:35:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 2.0) internal successors, (38), 32 states have internal predecessors, (38), 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) [2021-12-18 19:35:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 19:35:24,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:24,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 19:35:24,835 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:24,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:24,839 INFO L85 PathProgramCache]: Analyzing trace with hash 889508760, now seen corresponding path program 1 times [2021-12-18 19:35:24,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:24,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855887623] [2021-12-18 19:35:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:24,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:25,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:25,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855887623] [2021-12-18 19:35:25,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855887623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:25,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:25,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:25,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335608638] [2021-12-18 19:35:25,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:25,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:25,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:25,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:25,054 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 2.0) internal successors, (38), 32 states have internal predecessors, (38), 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-12-18 19:35:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:25,082 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-12-18 19:35:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:25,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-12-18 19:35:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:25,089 INFO L225 Difference]: With dead ends: 33 [2021-12-18 19:35:25,089 INFO L226 Difference]: Without dead ends: 31 [2021-12-18 19:35:25,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:25,094 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:25,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 28 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-18 19:35:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-18 19:35:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 30 states have internal predecessors, (33), 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) [2021-12-18 19:35:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-12-18 19:35:25,117 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 6 [2021-12-18 19:35:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:25,117 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-12-18 19:35:25,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-12-18 19:35:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-12-18 19:35:25,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:35:25,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:25,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:25,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:35:25,118 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:25,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:25,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968471, now seen corresponding path program 1 times [2021-12-18 19:35:25,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:25,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581626161] [2021-12-18 19:35:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:25,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:25,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581626161] [2021-12-18 19:35:25,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581626161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:25,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:25,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:25,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751292820] [2021-12-18 19:35:25,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:25,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:25,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:25,169 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-12-18 19:35:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:25,204 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-12-18 19:35:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2021-12-18 19:35:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:25,208 INFO L225 Difference]: With dead ends: 37 [2021-12-18 19:35:25,208 INFO L226 Difference]: Without dead ends: 37 [2021-12-18 19:35:25,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:25,214 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:25,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-18 19:35:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2021-12-18 19:35:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 31 states have internal predecessors, (34), 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) [2021-12-18 19:35:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-12-18 19:35:25,222 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 7 [2021-12-18 19:35:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:25,224 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-12-18 19:35:25,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-12-18 19:35:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-12-18 19:35:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:35:25,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:25,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:25,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:35:25,227 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:25,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:25,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968521, now seen corresponding path program 1 times [2021-12-18 19:35:25,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:25,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617795233] [2021-12-18 19:35:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:25,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:25,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617795233] [2021-12-18 19:35:25,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617795233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:25,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:25,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:35:25,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330818887] [2021-12-18 19:35:25,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:25,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:25,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:25,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:25,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:25,266 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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) [2021-12-18 19:35:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:25,288 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-12-18 19:35:25,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:25,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 [2021-12-18 19:35:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:25,290 INFO L225 Difference]: With dead ends: 29 [2021-12-18 19:35:25,290 INFO L226 Difference]: Without dead ends: 29 [2021-12-18 19:35:25,290 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 [2021-12-18 19:35:25,291 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:25,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-18 19:35:25,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-18 19:35:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.631578947368421) internal successors, (31), 28 states have internal predecessors, (31), 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) [2021-12-18 19:35:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-18 19:35:25,295 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 7 [2021-12-18 19:35:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:25,295 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-18 19:35:25,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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) [2021-12-18 19:35:25,296 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-18 19:35:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:35:25,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:25,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:25,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 19:35:25,297 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:25,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968522, now seen corresponding path program 1 times [2021-12-18 19:35:25,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:25,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043113965] [2021-12-18 19:35:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:25,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:25,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043113965] [2021-12-18 19:35:25,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043113965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:25,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:25,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:35:25,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009925023] [2021-12-18 19:35:25,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:25,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:35:25,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:35:25,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:35:25,410 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2021-12-18 19:35:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:25,452 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-18 19:35:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:25,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 [2021-12-18 19:35:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:25,454 INFO L225 Difference]: With dead ends: 30 [2021-12-18 19:35:25,454 INFO L226 Difference]: Without dead ends: 30 [2021-12-18 19:35:25,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:35:25,455 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:25,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-18 19:35:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-18 19:35:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 27 states have internal predecessors, (30), 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) [2021-12-18 19:35:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-18 19:35:25,459 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 7 [2021-12-18 19:35:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:25,459 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-18 19:35:25,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2021-12-18 19:35:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-18 19:35:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:35:25,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:25,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:25,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 19:35:25,461 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:25,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2013824102, now seen corresponding path program 1 times [2021-12-18 19:35:25,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:25,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145722787] [2021-12-18 19:35:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:25,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:25,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145722787] [2021-12-18 19:35:25,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145722787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:25,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707142734] [2021-12-18 19:35:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:25,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:25,503 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) [2021-12-18 19:35:25,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:35:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:25,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 19:35:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:25,634 INFO L388 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 [2021-12-18 19:35:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:25,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:25,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707142734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:25,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:35:25,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-12-18 19:35:25,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048538021] [2021-12-18 19:35:25,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:25,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:25,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:25,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:25,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:25,673 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2021-12-18 19:35:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:25,720 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-12-18 19:35:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:25,721 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), 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 [2021-12-18 19:35:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:25,723 INFO L225 Difference]: With dead ends: 25 [2021-12-18 19:35:25,724 INFO L226 Difference]: Without dead ends: 25 [2021-12-18 19:35:25,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:35:25,730 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:25,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 16 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:25,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-18 19:35:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-18 19:35:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 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) [2021-12-18 19:35:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-12-18 19:35:25,737 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2021-12-18 19:35:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:25,738 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-12-18 19:35:25,743 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), 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) [2021-12-18 19:35:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-12-18 19:35:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:35:25,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:25,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:25,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:25,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:25,964 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2013824101, now seen corresponding path program 1 times [2021-12-18 19:35:25,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:25,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033364904] [2021-12-18 19:35:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033364904] [2021-12-18 19:35:26,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033364904] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:26,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190012799] [2021-12-18 19:35:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:26,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:26,057 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) [2021-12-18 19:35:26,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 19:35:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 19:35:26,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:26,167 INFO L388 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 [2021-12-18 19:35:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:26,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:26,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190012799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:35:26,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-12-18 19:35:26,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492050850] [2021-12-18 19:35:26,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:26,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:26,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:35:26,238 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2021-12-18 19:35:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,291 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-12-18 19:35:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:26,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 [2021-12-18 19:35:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,294 INFO L225 Difference]: With dead ends: 35 [2021-12-18 19:35:26,294 INFO L226 Difference]: Without dead ends: 35 [2021-12-18 19:35:26,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:26,297 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:26,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-18 19:35:26,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-12-18 19:35:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 30 states have internal predecessors, (34), 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) [2021-12-18 19:35:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-18 19:35:26,300 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 11 [2021-12-18 19:35:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,300 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-18 19:35:26,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2021-12-18 19:35:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-18 19:35:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:35:26,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,301 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:26,501 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,SelfDestructingSolverStorable5 [2021-12-18 19:35:26,502 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:26,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2013824051, now seen corresponding path program 1 times [2021-12-18 19:35:26,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407647460] [2021-12-18 19:35:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407647460] [2021-12-18 19:35:26,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407647460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:26,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523036712] [2021-12-18 19:35:26,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:26,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:26,551 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) [2021-12-18 19:35:26,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 19:35:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 19:35:26,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:26,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523036712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:35:26,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-18 19:35:26,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49435170] [2021-12-18 19:35:26,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:26,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:26,675 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-18 19:35:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,702 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-12-18 19:35:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:26,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2021-12-18 19:35:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,703 INFO L225 Difference]: With dead ends: 57 [2021-12-18 19:35:26,704 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:35:26,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:26,705 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:26,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 49 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:35:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2021-12-18 19:35:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 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) [2021-12-18 19:35:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-12-18 19:35:26,709 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 11 [2021-12-18 19:35:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,709 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-12-18 19:35:26,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-18 19:35:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-12-18 19:35:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:35:26,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,710 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:26,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:26,920 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1333765681, now seen corresponding path program 1 times [2021-12-18 19:35:26,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137124345] [2021-12-18 19:35:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:27,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:27,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137124345] [2021-12-18 19:35:27,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137124345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:27,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393059579] [2021-12-18 19:35:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:27,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:27,029 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) [2021-12-18 19:35:27,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 19:35:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:35:27,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:27,100 INFO L388 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 [2021-12-18 19:35:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:27,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:27,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393059579] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:27,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:27,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-18 19:35:27,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887365400] [2021-12-18 19:35:27,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:27,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 19:35:27,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 19:35:27,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:35:27,406 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 11 states have internal predecessors, (24), 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) [2021-12-18 19:35:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:27,489 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-18 19:35:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:35:27,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 11 states have internal predecessors, (24), 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 [2021-12-18 19:35:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:27,491 INFO L225 Difference]: With dead ends: 39 [2021-12-18 19:35:27,491 INFO L226 Difference]: Without dead ends: 39 [2021-12-18 19:35:27,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:35:27,492 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:27,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-18 19:35:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-12-18 19:35:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 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) [2021-12-18 19:35:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-12-18 19:35:27,495 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 11 [2021-12-18 19:35:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:27,495 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-12-18 19:35:27,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 11 states have internal predecessors, (24), 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) [2021-12-18 19:35:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-12-18 19:35:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:35:27,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:27,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:27,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-18 19:35:27,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:27,703 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:27,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2109737472, now seen corresponding path program 1 times [2021-12-18 19:35:27,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:27,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129328952] [2021-12-18 19:35:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:27,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:27,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129328952] [2021-12-18 19:35:27,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129328952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:27,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:27,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:27,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446594707] [2021-12-18 19:35:27,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:27,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:27,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:27,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:27,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:27,784 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-18 19:35:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:27,798 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-18 19:35:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:27,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2021-12-18 19:35:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:27,799 INFO L225 Difference]: With dead ends: 35 [2021-12-18 19:35:27,799 INFO L226 Difference]: Without dead ends: 33 [2021-12-18 19:35:27,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:27,800 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:27,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-18 19:35:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-18 19:35:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 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) [2021-12-18 19:35:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-18 19:35:27,803 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 15 [2021-12-18 19:35:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:27,804 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-18 19:35:27,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-18 19:35:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-18 19:35:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 19:35:27,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:27,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:27,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 19:35:27,805 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1407328063, now seen corresponding path program 1 times [2021-12-18 19:35:27,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:27,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733853938] [2021-12-18 19:35:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:28,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:28,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733853938] [2021-12-18 19:35:28,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733853938] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:28,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266092232] [2021-12-18 19:35:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:28,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:28,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:28,060 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) [2021-12-18 19:35:28,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 19:35:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:28,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 19:35:28,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:28,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:35:28,210 INFO L388 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 15 treesize of output 7 [2021-12-18 19:35:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:28,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:28,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266092232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:28,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:35:28,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 10 [2021-12-18 19:35:28,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828287365] [2021-12-18 19:35:28,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:28,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:35:28,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:35:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:28,224 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-12-18 19:35:28,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:28,263 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-18 19:35:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:35:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 18 [2021-12-18 19:35:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:28,267 INFO L225 Difference]: With dead ends: 36 [2021-12-18 19:35:28,267 INFO L226 Difference]: Without dead ends: 26 [2021-12-18 19:35:28,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:35:28,268 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:28,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 41 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-18 19:35:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-18 19:35:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 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) [2021-12-18 19:35:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-12-18 19:35:28,272 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2021-12-18 19:35:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:28,272 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-12-18 19:35:28,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-12-18 19:35:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-12-18 19:35:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 19:35:28,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:28,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:28,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:28,496 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,SelfDestructingSolverStorable9 [2021-12-18 19:35:28,497 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:28,498 INFO L85 PathProgramCache]: Analyzing trace with hash 386259709, now seen corresponding path program 1 times [2021-12-18 19:35:28,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:28,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804014554] [2021-12-18 19:35:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:28,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:28,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:28,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804014554] [2021-12-18 19:35:28,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804014554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:28,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774732241] [2021-12-18 19:35:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:28,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:28,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:28,831 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) [2021-12-18 19:35:28,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 19:35:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:28,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 19:35:28,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:28,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 19:35:29,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:29,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:29,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2021-12-18 19:35:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:29,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:29,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 70 [2021-12-18 19:35:29,300 INFO L388 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 19 treesize of output 17 [2021-12-18 19:35:29,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:29,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 101 [2021-12-18 19:35:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774732241] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:29,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:29,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2021-12-18 19:35:29,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323073549] [2021-12-18 19:35:29,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:29,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:35:29,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:29,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:35:29,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:35:29,423 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 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) [2021-12-18 19:35:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:29,594 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-18 19:35:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:35:29,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 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 18 [2021-12-18 19:35:29,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:29,596 INFO L225 Difference]: With dead ends: 36 [2021-12-18 19:35:29,596 INFO L226 Difference]: Without dead ends: 33 [2021-12-18 19:35:29,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-12-18 19:35:29,596 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:29,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 41 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-18 19:35:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-12-18 19:35:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 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) [2021-12-18 19:35:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-12-18 19:35:29,599 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-12-18 19:35:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:29,599 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-12-18 19:35:29,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 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) [2021-12-18 19:35:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-12-18 19:35:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 19:35:29,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:29,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:29,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:29,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:29,801 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:29,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:29,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1254493542, now seen corresponding path program 2 times [2021-12-18 19:35:29,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:29,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450779024] [2021-12-18 19:35:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:29,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450779024] [2021-12-18 19:35:29,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450779024] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:29,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176867108] [2021-12-18 19:35:29,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:35:29,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:29,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:29,892 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) [2021-12-18 19:35:29,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 19:35:29,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:35:29,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:29,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:35:29,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:29,977 INFO L388 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 [2021-12-18 19:35:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:30,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:30,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176867108] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:30,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:30,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2021-12-18 19:35:30,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597660895] [2021-12-18 19:35:30,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:30,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 19:35:30,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 19:35:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:35:30,329 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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) [2021-12-18 19:35:30,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:30,562 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-18 19:35:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:35:30,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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 22 [2021-12-18 19:35:30,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:30,563 INFO L225 Difference]: With dead ends: 36 [2021-12-18 19:35:30,563 INFO L226 Difference]: Without dead ends: 36 [2021-12-18 19:35:30,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-12-18 19:35:30,564 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 112 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:30,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 38 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-18 19:35:30,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-12-18 19:35:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 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) [2021-12-18 19:35:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-12-18 19:35:30,567 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 22 [2021-12-18 19:35:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:30,567 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-12-18 19:35:30,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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) [2021-12-18 19:35:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-12-18 19:35:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 19:35:30,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:30,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:30,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:30,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:30,779 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:30,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1549441888, now seen corresponding path program 3 times [2021-12-18 19:35:30,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:30,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771692954] [2021-12-18 19:35:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:31,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771692954] [2021-12-18 19:35:31,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771692954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513683258] [2021-12-18 19:35:31,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:35:31,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:31,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:31,017 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) [2021-12-18 19:35:31,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 19:35:31,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 19:35:31,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:31,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 19:35:31,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:31,365 INFO L388 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 15 treesize of output 7 [2021-12-18 19:35:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:31,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:31,413 INFO L354 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-18 19:35:31,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-18 19:35:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:31,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513683258] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:31,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:31,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2021-12-18 19:35:31,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373010823] [2021-12-18 19:35:31,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:31,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 19:35:31,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:31,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 19:35:31,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-12-18 19:35:31,723 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 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) [2021-12-18 19:35:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:32,149 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-12-18 19:35:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:35:32,150 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 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 29 [2021-12-18 19:35:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:32,150 INFO L225 Difference]: With dead ends: 47 [2021-12-18 19:35:32,150 INFO L226 Difference]: Without dead ends: 37 [2021-12-18 19:35:32,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:35:32,151 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 124 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:32,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 75 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-18 19:35:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-12-18 19:35:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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) [2021-12-18 19:35:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-12-18 19:35:32,154 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-12-18 19:35:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:32,154 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-12-18 19:35:32,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 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) [2021-12-18 19:35:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-12-18 19:35:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 19:35:32,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:32,154 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:32,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:32,355 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,SelfDestructingSolverStorable12 [2021-12-18 19:35:32,355 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:32,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1131712419, now seen corresponding path program 4 times [2021-12-18 19:35:32,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:32,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588519800] [2021-12-18 19:35:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:32,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:32,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:32,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588519800] [2021-12-18 19:35:32,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588519800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:32,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346215859] [2021-12-18 19:35:32,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:35:32,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:32,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:32,492 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) [2021-12-18 19:35:32,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 19:35:32,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:35:32,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:32,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 19:35:32,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:32,555 INFO L388 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 [2021-12-18 19:35:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:32,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:33,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346215859] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:33,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:33,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2021-12-18 19:35:33,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533003303] [2021-12-18 19:35:33,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:33,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 19:35:33,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:33,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 19:35:33,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:35:33,039 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 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) [2021-12-18 19:35:33,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:33,395 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-12-18 19:35:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:35:33,395 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 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 33 [2021-12-18 19:35:33,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:33,395 INFO L225 Difference]: With dead ends: 47 [2021-12-18 19:35:33,395 INFO L226 Difference]: Without dead ends: 47 [2021-12-18 19:35:33,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:35:33,396 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 121 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:33,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 67 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:33,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-18 19:35:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-12-18 19:35:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 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) [2021-12-18 19:35:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-18 19:35:33,400 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 33 [2021-12-18 19:35:33,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:33,400 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-18 19:35:33,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 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) [2021-12-18 19:35:33,400 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-18 19:35:33,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 19:35:33,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:33,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:33,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:33,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-18 19:35:33,615 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:33,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:33,616 INFO L85 PathProgramCache]: Analyzing trace with hash -128978377, now seen corresponding path program 5 times [2021-12-18 19:35:33,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:33,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321374580] [2021-12-18 19:35:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:33,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:33,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:33,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321374580] [2021-12-18 19:35:33,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321374580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:33,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274429064] [2021-12-18 19:35:33,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:35:33,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:33,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:33,877 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) [2021-12-18 19:35:33,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 19:35:33,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-18 19:35:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:33,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:35:33,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:34,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:35:34,342 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-18 19:35:34,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-12-18 19:35:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:34,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:34,412 INFO L388 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 40 treesize of output 31 [2021-12-18 19:35:34,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:34,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-12-18 19:35:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:34,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274429064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:34,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:34,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 33 [2021-12-18 19:35:34,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647292445] [2021-12-18 19:35:34,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:34,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 19:35:34,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:34,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 19:35:34,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 19:35:34,728 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 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) [2021-12-18 19:35:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:35,254 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-12-18 19:35:35,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:35:35,254 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 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 40 [2021-12-18 19:35:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:35,255 INFO L225 Difference]: With dead ends: 65 [2021-12-18 19:35:35,255 INFO L226 Difference]: Without dead ends: 48 [2021-12-18 19:35:35,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 19:35:35,256 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:35,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 111 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-18 19:35:35,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-12-18 19:35:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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) [2021-12-18 19:35:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-18 19:35:35,259 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2021-12-18 19:35:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:35,259 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-18 19:35:35,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 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) [2021-12-18 19:35:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-18 19:35:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 19:35:35,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:35,261 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:35,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:35,471 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,SelfDestructingSolverStorable14 [2021-12-18 19:35:35,471 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash 749979156, now seen corresponding path program 6 times [2021-12-18 19:35:35,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:35,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122170415] [2021-12-18 19:35:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:35,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:35,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:35,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122170415] [2021-12-18 19:35:35,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122170415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:35,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222701880] [2021-12-18 19:35:35,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:35:35,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:35,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:35,604 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) [2021-12-18 19:35:35,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 19:35:35,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-18 19:35:35,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:35:35,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:35,725 INFO L388 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 8 treesize of output 7 [2021-12-18 19:35:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:36,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:36,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222701880] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:36,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:36,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 29 [2021-12-18 19:35:36,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388009237] [2021-12-18 19:35:36,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:36,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 19:35:36,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:36,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 19:35:36,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-12-18 19:35:36,604 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 29 states have (on average 4.344827586206897) internal successors, (126), 30 states have internal predecessors, (126), 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) [2021-12-18 19:35:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:37,326 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-12-18 19:35:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:35:37,327 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.344827586206897) internal successors, (126), 30 states have internal predecessors, (126), 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 44 [2021-12-18 19:35:37,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:37,327 INFO L225 Difference]: With dead ends: 58 [2021-12-18 19:35:37,328 INFO L226 Difference]: Without dead ends: 58 [2021-12-18 19:35:37,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=322, Invalid=1484, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 19:35:37,329 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 192 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:37,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 117 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-18 19:35:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-12-18 19:35:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 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) [2021-12-18 19:35:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-12-18 19:35:37,331 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 44 [2021-12-18 19:35:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:37,332 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-12-18 19:35:37,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.344827586206897) internal successors, (126), 30 states have internal predecessors, (126), 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) [2021-12-18 19:35:37,332 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-12-18 19:35:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:35:37,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:37,333 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:37,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:37,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-18 19:35:37,535 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:35:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:37,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1410124454, now seen corresponding path program 7 times [2021-12-18 19:35:37,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:37,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037654965] [2021-12-18 19:35:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:37,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:37,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:37,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037654965] [2021-12-18 19:35:37,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037654965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:37,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518558565] [2021-12-18 19:35:37,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:35:37,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:37,819 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) [2021-12-18 19:35:37,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 19:35:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:37,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 19:35:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:38,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:35:38,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:35:38,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:35:38,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:35:38,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-18 19:35:38,510 INFO L388 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 15 treesize of output 7 [2021-12-18 19:35:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:38,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:39,912 INFO L388 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 309 treesize of output 297 [2021-12-18 19:35:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:39,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 644 treesize of output 565 [2021-12-18 19:35:39,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:39,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:39,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 2701 treesize of output 2337 [2021-12-18 19:42:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 23 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:28,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518558565] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:28,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:28,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 23] total 50 [2021-12-18 19:42:28,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398788380] [2021-12-18 19:42:28,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:28,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-18 19:42:28,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:28,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-18 19:42:28,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2178, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 19:42:28,206 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 50 states, 50 states have (on average 2.6) internal successors, (130), 50 states have internal predecessors, (130), 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) [2021-12-18 19:42:28,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:28,931 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-12-18 19:42:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:42:28,932 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.6) internal successors, (130), 50 states have internal predecessors, (130), 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 51 [2021-12-18 19:42:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:28,932 INFO L225 Difference]: With dead ends: 83 [2021-12-18 19:42:28,932 INFO L226 Difference]: Without dead ends: 59 [2021-12-18 19:42:28,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=403, Invalid=3257, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:42:28,933 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 165 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:28,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 174 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 656 Invalid, 0 Unknown, 299 Unchecked, 0.3s Time] [2021-12-18 19:42:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-18 19:42:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-12-18 19:42:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 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) [2021-12-18 19:42:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-12-18 19:42:28,935 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2021-12-18 19:42:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:28,935 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-12-18 19:42:28,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.6) internal successors, (130), 50 states have internal predecessors, (130), 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) [2021-12-18 19:42:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-12-18 19:42:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 19:42:28,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:28,937 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:28,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:29,151 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,SelfDestructingSolverStorable16 [2021-12-18 19:42:29,151 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:42:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1552754007, now seen corresponding path program 8 times [2021-12-18 19:42:29,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:29,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086046675] [2021-12-18 19:42:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:29,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:29,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:29,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086046675] [2021-12-18 19:42:29,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086046675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:29,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053470936] [2021-12-18 19:42:29,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:42:29,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:29,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:29,316 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) [2021-12-18 19:42:29,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 19:42:29,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:42:29,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:29,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:42:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:29,416 INFO L388 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 [2021-12-18 19:42:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:29,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 45 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:30,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053470936] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:30,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:30,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2021-12-18 19:42:30,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407924061] [2021-12-18 19:42:30,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:30,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 19:42:30,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 19:42:30,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:42:30,274 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 36 states, 35 states have (on average 4.4) internal successors, (154), 36 states have internal predecessors, (154), 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) [2021-12-18 19:42:30,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:30,884 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-12-18 19:42:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:42:30,885 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.4) internal successors, (154), 36 states have internal predecessors, (154), 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 55 [2021-12-18 19:42:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:30,885 INFO L225 Difference]: With dead ends: 69 [2021-12-18 19:42:30,885 INFO L226 Difference]: Without dead ends: 69 [2021-12-18 19:42:30,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=2118, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 19:42:30,887 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 197 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:30,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 141 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:42:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-18 19:42:30,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-12-18 19:42:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 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) [2021-12-18 19:42:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-12-18 19:42:30,889 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 55 [2021-12-18 19:42:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:30,890 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-12-18 19:42:30,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.4) internal successors, (154), 36 states have internal predecessors, (154), 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) [2021-12-18 19:42:30,890 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-12-18 19:42:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 19:42:30,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:30,891 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:30,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:31,099 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,SelfDestructingSolverStorable17 [2021-12-18 19:42:31,099 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:42:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:31,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1510058895, now seen corresponding path program 9 times [2021-12-18 19:42:31,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:31,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238552282] [2021-12-18 19:42:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:31,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:31,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238552282] [2021-12-18 19:42:31,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238552282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226671142] [2021-12-18 19:42:31,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:42:31,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:31,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:31,453 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) [2021-12-18 19:42:31,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 19:42:31,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 19:42:31,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 19:42:31,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:32,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:42:32,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:42:32,200 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-18 19:42:32,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-12-18 19:42:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:32,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:32,384 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-12-18 19:42:32,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 64 [2021-12-18 19:42:32,387 INFO L388 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 98 treesize of output 80 [2021-12-18 19:42:32,401 INFO L354 Elim1Store]: treesize reduction 14, result has 67.4 percent of original size [2021-12-18 19:42:32,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 80 treesize of output 78 [2021-12-18 19:42:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:32,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226671142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:32,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:32,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 18] total 46 [2021-12-18 19:42:32,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947836119] [2021-12-18 19:42:32,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:32,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 19:42:32,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:32,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 19:42:32,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1914, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 19:42:32,921 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 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) [2021-12-18 19:42:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:33,932 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2021-12-18 19:42:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:42:33,932 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 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 62 [2021-12-18 19:42:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:33,933 INFO L225 Difference]: With dead ends: 101 [2021-12-18 19:42:33,933 INFO L226 Difference]: Without dead ends: 70 [2021-12-18 19:42:33,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=296, Invalid=3486, Unknown=0, NotChecked=0, Total=3782 [2021-12-18 19:42:33,935 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 129 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:33,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 253 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1120 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2021-12-18 19:42:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-18 19:42:33,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-12-18 19:42:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 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) [2021-12-18 19:42:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-12-18 19:42:33,938 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2021-12-18 19:42:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:33,938 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-12-18 19:42:33,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 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) [2021-12-18 19:42:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-12-18 19:42:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 19:42:33,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:33,941 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:33,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:34,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:34,143 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:42:34,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash 205730958, now seen corresponding path program 10 times [2021-12-18 19:42:34,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:34,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949987630] [2021-12-18 19:42:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:34,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 28 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:34,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:34,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949987630] [2021-12-18 19:42:34,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949987630] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:34,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866284602] [2021-12-18 19:42:34,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:42:34,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:34,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:34,339 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:34,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 19:42:34,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:42:34,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-18 19:42:34,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:34,424 INFO L388 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 [2021-12-18 19:42:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 50 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:34,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 66 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:35,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866284602] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:35,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:35,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2021-12-18 19:42:35,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072386902] [2021-12-18 19:42:35,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:35,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 19:42:35,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:35,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 19:42:35,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:42:35,382 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 36 states, 35 states have (on average 4.628571428571429) internal successors, (162), 36 states have internal predecessors, (162), 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) [2021-12-18 19:42:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:36,165 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-12-18 19:42:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 19:42:36,166 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.628571428571429) internal successors, (162), 36 states have internal predecessors, (162), 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 66 [2021-12-18 19:42:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:36,166 INFO L225 Difference]: With dead ends: 80 [2021-12-18 19:42:36,166 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 19:42:36,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 19:42:36,168 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 176 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:36,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 192 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:42:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 19:42:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-12-18 19:42:36,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 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) [2021-12-18 19:42:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-12-18 19:42:36,170 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 66 [2021-12-18 19:42:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:36,170 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-12-18 19:42:36,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.628571428571429) internal successors, (162), 36 states have internal predecessors, (162), 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) [2021-12-18 19:42:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-12-18 19:42:36,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 19:42:36,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:36,172 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:36,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-18 19:42:36,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:36,395 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:42:36,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:36,396 INFO L85 PathProgramCache]: Analyzing trace with hash -399180052, now seen corresponding path program 11 times [2021-12-18 19:42:36,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:36,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038376337] [2021-12-18 19:42:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:36,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 26 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:36,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038376337] [2021-12-18 19:42:36,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038376337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483128786] [2021-12-18 19:42:36,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:42:36,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:36,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:36,766 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:36,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 19:42:37,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 19:42:37,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:42:37,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:37,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:42:37,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:42:37,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:42:37,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:42:37,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:42:37,719 INFO L388 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 15 treesize of output 7 [2021-12-18 19:42:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 26 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:37,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:38,205 INFO L354 Elim1Store]: treesize reduction 324, result has 11.2 percent of original size [2021-12-18 19:42:38,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 6798 treesize of output 4246 [2021-12-18 19:42:38,234 INFO L388 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 7406 treesize of output 6254 [2021-12-18 19:42:38,298 INFO L354 Elim1Store]: treesize reduction 125, result has 36.2 percent of original size [2021-12-18 19:42:38,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 6254 treesize of output 4404 [2021-12-18 19:42:38,400 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-18 19:42:38,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:42:38,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-12-18 19:42:38,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191261396] [2021-12-18 19:42:38,400 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:38,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-18 19:42:38,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-18 19:42:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:42:38,401 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2021-12-18 19:42:39,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:39,054 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2021-12-18 19:42:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:42:39,055 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 73 [2021-12-18 19:42:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:39,055 INFO L225 Difference]: With dead ends: 116 [2021-12-18 19:42:39,055 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 19:42:39,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 19:42:39,057 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:39,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 177 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:42:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 19:42:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-18 19:42:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 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) [2021-12-18 19:42:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-12-18 19:42:39,058 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2021-12-18 19:42:39,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:39,059 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-12-18 19:42:39,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2021-12-18 19:42:39,059 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-12-18 19:42:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-18 19:42:39,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:39,059 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:39,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:39,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:39,260 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:42:39,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:39,260 INFO L85 PathProgramCache]: Analyzing trace with hash -12330321, now seen corresponding path program 12 times [2021-12-18 19:42:39,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:39,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093488892] [2021-12-18 19:42:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:39,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 45 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:39,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093488892] [2021-12-18 19:42:39,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093488892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257933034] [2021-12-18 19:42:39,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:42:39,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:39,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:39,492 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:39,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 19:42:39,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-18 19:42:39,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:39,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-18 19:42:39,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:39,772 INFO L388 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 [2021-12-18 19:42:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 72 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:40,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 91 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:40,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257933034] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:40,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:40,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2021-12-18 19:42:40,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650417752] [2021-12-18 19:42:40,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:40,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 19:42:40,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:40,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 19:42:40,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1840, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 19:42:40,943 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 47 states, 46 states have (on average 4.869565217391305) internal successors, (224), 47 states have internal predecessors, (224), 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) [2021-12-18 19:42:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:41,904 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-12-18 19:42:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:42:41,905 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.869565217391305) internal successors, (224), 47 states have internal predecessors, (224), 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 77 [2021-12-18 19:42:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:41,907 INFO L225 Difference]: With dead ends: 91 [2021-12-18 19:42:41,908 INFO L226 Difference]: Without dead ends: 91 [2021-12-18 19:42:41,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=800, Invalid=3756, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 19:42:41,910 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 231 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:41,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 236 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:42:41,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-18 19:42:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-12-18 19:42:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 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) [2021-12-18 19:42:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-12-18 19:42:41,917 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 77 [2021-12-18 19:42:41,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:41,917 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-12-18 19:42:41,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.869565217391305) internal successors, (224), 47 states have internal predecessors, (224), 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) [2021-12-18 19:42:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-12-18 19:42:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-18 19:42:41,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:41,918 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:41,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:42,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:42,142 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:42:42,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:42,142 INFO L85 PathProgramCache]: Analyzing trace with hash -61578837, now seen corresponding path program 13 times [2021-12-18 19:42:42,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:42,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112467609] [2021-12-18 19:42:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:42,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 31 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:42,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:42,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112467609] [2021-12-18 19:42:42,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112467609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:42,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232960192] [2021-12-18 19:42:42,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:42:42,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:42,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:42,543 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:42,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 19:42:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:42,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 19:42:42,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:43,505 INFO L388 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 15 treesize of output 7 [2021-12-18 19:42:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 31 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:43,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:43,568 INFO L354 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-18 19:42:43,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-18 19:42:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 31 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:44,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232960192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:44,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:44,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 57 [2021-12-18 19:42:44,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096313461] [2021-12-18 19:42:44,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:44,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 19:42:44,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:44,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 19:42:44,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2964, Unknown=0, NotChecked=0, Total=3192 [2021-12-18 19:42:44,414 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 57 states, 57 states have (on average 4.017543859649122) internal successors, (229), 57 states have internal predecessors, (229), 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) [2021-12-18 19:42:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:45,481 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2021-12-18 19:42:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:42:45,482 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.017543859649122) internal successors, (229), 57 states have internal predecessors, (229), 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 84 [2021-12-18 19:42:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:45,482 INFO L225 Difference]: With dead ends: 137 [2021-12-18 19:42:45,482 INFO L226 Difference]: Without dead ends: 92 [2021-12-18 19:42:45,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=371, Invalid=4599, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 19:42:45,484 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 152 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:45,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 371 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:42:45,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-18 19:42:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2021-12-18 19:42:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 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) [2021-12-18 19:42:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-18 19:42:45,487 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2021-12-18 19:42:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:45,487 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-18 19:42:45,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.017543859649122) internal successors, (229), 57 states have internal predecessors, (229), 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) [2021-12-18 19:42:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-18 19:42:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-18 19:42:45,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:45,488 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:45,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:45,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:45,707 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:42:45,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:45,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1699716616, now seen corresponding path program 14 times [2021-12-18 19:42:45,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:45,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887906853] [2021-12-18 19:42:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:45,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 66 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:46,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:46,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887906853] [2021-12-18 19:42:46,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887906853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:46,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244605220] [2021-12-18 19:42:46,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:42:46,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:46,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:46,017 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:46,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 19:42:46,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:42:46,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 19:42:46,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:46,137 INFO L388 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 [2021-12-18 19:42:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 91 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:46,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 120 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:47,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244605220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:47,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:47,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2021-12-18 19:42:47,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551169574] [2021-12-18 19:42:47,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:47,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 19:42:47,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:47,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 19:42:47,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2659, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 19:42:47,687 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 56 states, 55 states have (on average 4.6909090909090905) internal successors, (258), 56 states have internal predecessors, (258), 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) [2021-12-18 19:42:49,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:49,037 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-12-18 19:42:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 19:42:49,038 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 4.6909090909090905) internal successors, (258), 56 states have internal predecessors, (258), 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 88 [2021-12-18 19:42:49,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:49,039 INFO L225 Difference]: With dead ends: 102 [2021-12-18 19:42:49,039 INFO L226 Difference]: Without dead ends: 102 [2021-12-18 19:42:49,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=976, Invalid=5344, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 19:42:49,041 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 283 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:49,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 330 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:42:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-18 19:42:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-12-18 19:42:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 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) [2021-12-18 19:42:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-18 19:42:49,043 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 88 [2021-12-18 19:42:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:49,044 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-18 19:42:49,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 4.6909090909090905) internal successors, (258), 56 states have internal predecessors, (258), 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) [2021-12-18 19:42:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-18 19:42:49,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-18 19:42:49,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:49,044 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:49,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:49,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:49,245 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:42:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1717557298, now seen corresponding path program 15 times [2021-12-18 19:42:49,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:49,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990809056] [2021-12-18 19:42:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:49,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:49,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:49,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990809056] [2021-12-18 19:42:49,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990809056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:49,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106499169] [2021-12-18 19:42:49,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:42:49,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:49,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:49,713 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:49,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 19:42:50,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-18 19:42:50,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:50,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:42:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:51,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:42:51,265 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-18 19:42:51,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-12-18 19:42:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:51,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:51,402 INFO L388 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 40 treesize of output 31 [2021-12-18 19:42:51,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:42:51,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-12-18 19:42:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:52,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106499169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:52,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:52,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 63 [2021-12-18 19:42:52,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292841162] [2021-12-18 19:42:52,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:52,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-18 19:42:52,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:52,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-18 19:42:52,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3698, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 19:42:52,369 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 63 states, 63 states have (on average 4.238095238095238) internal successors, (267), 63 states have internal predecessors, (267), 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) [2021-12-18 19:42:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:54,180 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2021-12-18 19:42:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 19:42:54,180 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.238095238095238) internal successors, (267), 63 states have internal predecessors, (267), 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 95 [2021-12-18 19:42:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:54,181 INFO L225 Difference]: With dead ends: 155 [2021-12-18 19:42:54,181 INFO L226 Difference]: Without dead ends: 103 [2021-12-18 19:42:54,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=392, Invalid=6748, Unknown=0, NotChecked=0, Total=7140 [2021-12-18 19:42:54,182 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 150 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 2994 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:54,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 657 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2994 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 19:42:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-18 19:42:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-12-18 19:42:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 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) [2021-12-18 19:42:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-12-18 19:42:54,185 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2021-12-18 19:42:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:54,185 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-12-18 19:42:54,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.238095238095238) internal successors, (267), 63 states have internal predecessors, (267), 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) [2021-12-18 19:42:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-12-18 19:42:54,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-18 19:42:54,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:54,187 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:54,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-18 19:42:54,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-18 19:42:54,395 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:42:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:54,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1865404491, now seen corresponding path program 16 times [2021-12-18 19:42:54,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:54,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041447159] [2021-12-18 19:42:54,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:54,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 91 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:54,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:54,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041447159] [2021-12-18 19:42:54,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041447159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:54,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559063265] [2021-12-18 19:42:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:42:54,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:54,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:54,795 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:54,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 19:42:54,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:42:54,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:54,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 19:42:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:54,925 INFO L388 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 [2021-12-18 19:42:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 128 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:55,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 153 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:56,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559063265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:56,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:56,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 57 [2021-12-18 19:42:56,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897408141] [2021-12-18 19:42:56,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:56,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 19:42:56,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 19:42:56,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2899, Unknown=0, NotChecked=0, Total=3306 [2021-12-18 19:42:56,769 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 58 states, 57 states have (on average 5.035087719298246) internal successors, (287), 58 states have internal predecessors, (287), 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) [2021-12-18 19:42:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:58,399 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2021-12-18 19:42:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 19:42:58,400 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 5.035087719298246) internal successors, (287), 58 states have internal predecessors, (287), 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 99 [2021-12-18 19:42:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:58,400 INFO L225 Difference]: With dead ends: 113 [2021-12-18 19:42:58,400 INFO L226 Difference]: Without dead ends: 113 [2021-12-18 19:42:58,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1033, Invalid=6107, Unknown=0, NotChecked=0, Total=7140 [2021-12-18 19:42:58,402 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 235 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:58,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 374 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:42:58,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-18 19:42:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2021-12-18 19:42:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 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) [2021-12-18 19:42:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-12-18 19:42:58,405 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 99 [2021-12-18 19:42:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:58,405 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-12-18 19:42:58,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 5.035087719298246) internal successors, (287), 58 states have internal predecessors, (287), 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) [2021-12-18 19:42:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-12-18 19:42:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-18 19:42:58,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:58,407 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:58,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:58,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-18 19:42:58,627 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:42:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash 141916645, now seen corresponding path program 17 times [2021-12-18 19:42:58,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564452193] [2021-12-18 19:42:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:58,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 41 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:59,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:59,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564452193] [2021-12-18 19:42:59,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564452193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:59,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233677526] [2021-12-18 19:42:59,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:42:59,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:59,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:59,192 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:59,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 19:42:59,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-18 19:42:59,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 19:42:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:59,816 INFO L388 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 [2021-12-18 19:43:01,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:43:01,257 INFO L388 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 15 treesize of output 11 [2021-12-18 19:43:01,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:01,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:43:01,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2021-12-18 19:43:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 245 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:01,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:01,412 INFO L388 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 40 treesize of output 31 [2021-12-18 19:43:01,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:43:01,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-12-18 19:43:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 87 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:03,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233677526] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:43:03,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:43:03,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 27] total 73 [2021-12-18 19:43:03,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079773366] [2021-12-18 19:43:03,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:43:03,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-18 19:43:03,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:43:03,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-18 19:43:03,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=4632, Unknown=0, NotChecked=0, Total=5256 [2021-12-18 19:43:03,428 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 73 states, 73 states have (on average 4.123287671232877) internal successors, (301), 73 states have internal predecessors, (301), 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) [2021-12-18 19:43:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:05,605 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2021-12-18 19:43:05,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 19:43:05,606 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.123287671232877) internal successors, (301), 73 states have internal predecessors, (301), 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 106 [2021-12-18 19:43:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:05,607 INFO L225 Difference]: With dead ends: 173 [2021-12-18 19:43:05,607 INFO L226 Difference]: Without dead ends: 114 [2021-12-18 19:43:05,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3077 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1454, Invalid=9676, Unknown=0, NotChecked=0, Total=11130 [2021-12-18 19:43:05,609 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 313 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:05,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 542 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2481 Invalid, 0 Unknown, 25 Unchecked, 0.9s Time] [2021-12-18 19:43:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-18 19:43:05,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-12-18 19:43:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 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) [2021-12-18 19:43:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-12-18 19:43:05,611 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2021-12-18 19:43:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:05,612 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-12-18 19:43:05,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.123287671232877) internal successors, (301), 73 states have internal predecessors, (301), 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) [2021-12-18 19:43:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-12-18 19:43:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-18 19:43:05,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:05,612 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:05,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-18 19:43:05,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-18 19:43:05,813 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:43:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:05,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1193304706, now seen corresponding path program 18 times [2021-12-18 19:43:05,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:43:05,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820940594] [2021-12-18 19:43:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:43:05,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:43:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 120 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:06,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:43:06,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820940594] [2021-12-18 19:43:06,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820940594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:43:06,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927057019] [2021-12-18 19:43:06,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:43:06,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:06,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:43:06,208 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:43:06,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 19:43:07,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-18 19:43:07,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:43:07,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 19:43:07,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:43:07,209 INFO L388 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 [2021-12-18 19:43:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 153 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:08,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 190 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:09,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927057019] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:43:09,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:43:09,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2021-12-18 19:43:09,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670082914] [2021-12-18 19:43:09,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:43:09,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-18 19:43:09,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:43:09,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-18 19:43:09,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=3898, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 19:43:09,162 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 68 states, 67 states have (on average 4.835820895522388) internal successors, (324), 68 states have internal predecessors, (324), 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) [2021-12-18 19:43:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:11,097 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2021-12-18 19:43:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:43:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.835820895522388) internal successors, (324), 68 states have internal predecessors, (324), 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 110 [2021-12-18 19:43:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:11,098 INFO L225 Difference]: With dead ends: 124 [2021-12-18 19:43:11,098 INFO L226 Difference]: Without dead ends: 124 [2021-12-18 19:43:11,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2460 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1556, Invalid=7950, Unknown=0, NotChecked=0, Total=9506 [2021-12-18 19:43:11,100 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 472 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:11,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 399 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:43:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-18 19:43:11,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2021-12-18 19:43:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 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) [2021-12-18 19:43:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2021-12-18 19:43:11,102 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 110 [2021-12-18 19:43:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:11,103 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2021-12-18 19:43:11,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.835820895522388) internal successors, (324), 68 states have internal predecessors, (324), 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) [2021-12-18 19:43:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2021-12-18 19:43:11,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-18 19:43:11,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:11,104 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:11,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-18 19:43:11,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:11,319 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-18 19:43:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1036388744, now seen corresponding path program 19 times [2021-12-18 19:43:11,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:43:11,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367064633] [2021-12-18 19:43:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:43:11,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:43:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 46 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:11,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:43:11,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367064633] [2021-12-18 19:43:11,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367064633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:43:11,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027073144] [2021-12-18 19:43:11,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:43:11,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:11,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:43:11,932 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:43:11,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 19:43:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:12,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-18 19:43:12,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:43:12,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:43:12,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:43:12,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:43:12,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-18 19:43:13,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:43:13,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:43:13,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:43:13,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-18 19:43:13,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:43:13,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-18 19:43:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:43:13,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-18 19:43:13,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:43:13,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:43:14,073 INFO L388 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 15 treesize of output 7 [2021-12-18 19:43:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 46 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:14,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:52,034 INFO L388 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 1146 treesize of output 1116 [2021-12-18 19:43:52,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:52,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:43:52,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 130352577 treesize of output 113482091 [2021-12-18 19:46:56,760 WARN L227 SmtUtils]: Spent 3.07m on a formula simplification that was a NOOP. DAG size: 12119 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 19:46:57,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:57,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:47:25,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:47:25,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:47:25,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:47:25,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:47:25,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:47:25,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:47:25,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:47:25,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:47:25,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:47:25,383 INFO L173 IndexEqualityManager]: detected equality via solver