./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/960521-1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/960521-1-2.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 19e2947f690bcfa099d607c2a0a6dc0e6f351f54e3f3874a42109cbf9e336957 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:35:45,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:35:45,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:35:45,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:35:45,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:35:45,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:35:45,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:35:45,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:35:45,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:35:45,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:35:45,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:35:45,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:35:45,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:35:45,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:35:45,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:35:45,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:35:45,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:35:45,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:35:45,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:35:46,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:35:46,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:35:46,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:35:46,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:35:46,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:35:46,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:35:46,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:35:46,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:35:46,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:35:46,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:35:46,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:35:46,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:35:46,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:35:46,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:35:46,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:35:46,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:35:46,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:35:46,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:35:46,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:35:46,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:35:46,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:35:46,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:35:46,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:35:46,059 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:35:46,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:35:46,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:35:46,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:35:46,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:35:46,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:35:46,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:35:46,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:35:46,063 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:35:46,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:35:46,064 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:35:46,064 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:35:46,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:35:46,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:35:46,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:35:46,065 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:35:46,065 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:35:46,065 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:35:46,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:35:46,065 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:35:46,065 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:35:46,066 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:35:46,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:35:46,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:35:46,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:35:46,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:35:46,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:35:46,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:35:46,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:35:46,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:35:46,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:35:46,069 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19e2947f690bcfa099d607c2a0a6dc0e6f351f54e3f3874a42109cbf9e336957 [2021-12-14 19:35:46,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:35:46,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:35:46,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:35:46,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:35:46,308 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:35:46,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-2.i [2021-12-14 19:35:46,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1a67534/3abc0889583e4a91915baf124a2a7c26/FLAGdec514dcf [2021-12-14 19:35:46,822 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:35:46,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-2.i [2021-12-14 19:35:46,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1a67534/3abc0889583e4a91915baf124a2a7c26/FLAGdec514dcf [2021-12-14 19:35:46,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1a67534/3abc0889583e4a91915baf124a2a7c26 [2021-12-14 19:35:46,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:35:46,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:35:46,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:35:46,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:35:46,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:35:46,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:35:46" (1/1) ... [2021-12-14 19:35:46,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69104574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:46, skipping insertion in model container [2021-12-14 19:35:46,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:35:46" (1/1) ... [2021-12-14 19:35:46,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:35:46,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:35:47,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:35:47,243 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:35:47,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:35:47,324 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:35:47,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47 WrapperNode [2021-12-14 19:35:47,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:35:47,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:35:47,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:35:47,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:35:47,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,379 INFO L137 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-12-14 19:35:47,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:35:47,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:35:47,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:35:47,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:35:47,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:35:47,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:35:47,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:35:47,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:35:47,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (1/1) ... [2021-12-14 19:35:47,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:35:47,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:47,443 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) [2021-12-14 19:35:47,465 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 [2021-12-14 19:35:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:35:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 19:35:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:35:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:35:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:35:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 19:35:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:35:47,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:35:47,574 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:35:47,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:35:47,744 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:35:47,749 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:35:47,749 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 19:35:47,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:35:47 BoogieIcfgContainer [2021-12-14 19:35:47,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:35:47,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:35:47,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:35:47,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:35:47,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:35:46" (1/3) ... [2021-12-14 19:35:47,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1ba82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:35:47, skipping insertion in model container [2021-12-14 19:35:47,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:47" (2/3) ... [2021-12-14 19:35:47,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1ba82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:35:47, skipping insertion in model container [2021-12-14 19:35:47,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:35:47" (3/3) ... [2021-12-14 19:35:47,773 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-2.i [2021-12-14 19:35:47,777 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:35:47,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-12-14 19:35:47,816 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:35:47,821 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 [2021-12-14 19:35:47,822 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-12-14 19:35:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 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) [2021-12-14 19:35:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:35:47,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:47,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:35:47,841 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:47,846 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-14 19:35:47,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:47,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023021182] [2021-12-14 19:35:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:47,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:48,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023021182] [2021-12-14 19:35:48,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023021182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:48,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:48,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:35:48,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11979595] [2021-12-14 19:35:48,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:48,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:35:48,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:48,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:35:48,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:35:48,085 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:35:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:48,151 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-12-14 19:35:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:35:48,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-12-14 19:35:48,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:48,159 INFO L225 Difference]: With dead ends: 50 [2021-12-14 19:35:48,160 INFO L226 Difference]: Without dead ends: 48 [2021-12-14 19:35:48,162 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 [2021-12-14 19:35:48,165 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:48,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-14 19:35:48,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-14 19:35:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 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) [2021-12-14 19:35:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-12-14 19:35:48,197 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 3 [2021-12-14 19:35:48,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:48,198 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-12-14 19:35:48,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:35:48,198 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-12-14 19:35:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:35:48,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:48,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:35:48,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:35:48,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-14 19:35:48,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:48,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338206722] [2021-12-14 19:35:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:48,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:48,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:48,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338206722] [2021-12-14 19:35:48,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338206722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:48,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:48,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:35:48,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916973039] [2021-12-14 19:35:48,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:48,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:35:48,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:48,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:35:48,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:35:48,283 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:35:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:48,305 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-12-14 19:35:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:35:48,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-12-14 19:35:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:48,307 INFO L225 Difference]: With dead ends: 47 [2021-12-14 19:35:48,307 INFO L226 Difference]: Without dead ends: 47 [2021-12-14 19:35:48,307 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 [2021-12-14 19:35:48,308 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:48,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:48,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-14 19:35:48,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-14 19:35:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.75) internal successors, (49), 46 states have internal predecessors, (49), 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) [2021-12-14 19:35:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-12-14 19:35:48,316 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2021-12-14 19:35:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:48,316 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-12-14 19:35:48,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:35:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-12-14 19:35:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:35:48,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:48,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:35:48,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:35:48,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:48,322 INFO L85 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2021-12-14 19:35:48,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:48,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940485301] [2021-12-14 19:35:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:48,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:48,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:48,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940485301] [2021-12-14 19:35:48,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940485301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:48,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:48,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:35:48,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24187782] [2021-12-14 19:35:48,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:48,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:35:48,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:48,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:35:48,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:35:48,408 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2021-12-14 19:35:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:48,470 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-12-14 19:35:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:35:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 [2021-12-14 19:35:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:48,472 INFO L225 Difference]: With dead ends: 44 [2021-12-14 19:35:48,472 INFO L226 Difference]: Without dead ends: 44 [2021-12-14 19:35:48,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:35:48,476 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:48,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-14 19:35:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-14 19:35:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 43 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) [2021-12-14 19:35:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-12-14 19:35:48,486 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2021-12-14 19:35:48,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:48,486 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-12-14 19:35:48,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2021-12-14 19:35:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-12-14 19:35:48,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:35:48,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:48,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:35:48,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:35:48,488 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-12-14 19:35:48,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:48,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606765547] [2021-12-14 19:35:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:48,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:48,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:48,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606765547] [2021-12-14 19:35:48,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606765547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:48,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:48,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:35:48,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538822530] [2021-12-14 19:35:48,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:48,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:35:48,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:48,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:35:48,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:35:48,589 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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) [2021-12-14 19:35:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:48,657 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-12-14 19:35:48,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:35:48,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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 [2021-12-14 19:35:48,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:48,658 INFO L225 Difference]: With dead ends: 50 [2021-12-14 19:35:48,658 INFO L226 Difference]: Without dead ends: 50 [2021-12-14 19:35:48,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:35:48,660 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:48,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 64 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-14 19:35:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-14 19:35:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 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) [2021-12-14 19:35:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-14 19:35:48,665 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 6 [2021-12-14 19:35:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:48,665 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-14 19:35:48,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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) [2021-12-14 19:35:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-14 19:35:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 19:35:48,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:48,666 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:48,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:35:48,667 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:48,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2021-12-14 19:35:48,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:48,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623950878] [2021-12-14 19:35:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:48,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:48,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:48,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623950878] [2021-12-14 19:35:48,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623950878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:48,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785079762] [2021-12-14 19:35:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:48,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:48,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:48,795 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) [2021-12-14 19:35:48,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 19:35:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:48,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 19:35:48,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:35:48,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:35:48,929 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 10 treesize of output 8 [2021-12-14 19:35:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:49,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:49,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785079762] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:49,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:49,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2021-12-14 19:35:49,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16283715] [2021-12-14 19:35:49,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:49,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:35:49,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:35:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:35:49,106 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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) [2021-12-14 19:35:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:49,290 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2021-12-14 19:35:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:35:49,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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 9 [2021-12-14 19:35:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:49,292 INFO L225 Difference]: With dead ends: 92 [2021-12-14 19:35:49,292 INFO L226 Difference]: Without dead ends: 92 [2021-12-14 19:35:49,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:35:49,293 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 281 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:49,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 99 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-14 19:35:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2021-12-14 19:35:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 56 states have internal predecessors, (61), 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) [2021-12-14 19:35:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-14 19:35:49,298 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 9 [2021-12-14 19:35:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:49,299 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-14 19:35:49,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 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) [2021-12-14 19:35:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-14 19:35:49,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:35:49,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:49,300 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2021-12-14 19:35:49,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:49,511 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 [2021-12-14 19:35:49,512 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:49,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:49,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1941957673, now seen corresponding path program 2 times [2021-12-14 19:35:49,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:49,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070678778] [2021-12-14 19:35:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:49,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:49,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070678778] [2021-12-14 19:35:49,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070678778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298661859] [2021-12-14 19:35:49,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:35:49,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:49,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:49,691 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) [2021-12-14 19:35:49,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 19:35:49,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:35:49,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:35:49,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 19:35:49,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:49,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:35:49,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:35:49,788 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 10 treesize of output 8 [2021-12-14 19:35:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:50,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:50,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298661859] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:50,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:50,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2021-12-14 19:35:50,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117890802] [2021-12-14 19:35:50,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:50,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 19:35:50,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:50,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 19:35:50,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-12-14 19:35:50,520 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 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) [2021-12-14 19:35:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:51,004 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2021-12-14 19:35:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:35:51,005 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 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 [2021-12-14 19:35:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:51,009 INFO L225 Difference]: With dead ends: 197 [2021-12-14 19:35:51,009 INFO L226 Difference]: Without dead ends: 197 [2021-12-14 19:35:51,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:35:51,013 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1125 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:51,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1125 Valid, 203 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:35:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-14 19:35:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 55. [2021-12-14 19:35:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 54 states have internal predecessors, (59), 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) [2021-12-14 19:35:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-12-14 19:35:51,025 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 18 [2021-12-14 19:35:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:51,025 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-12-14 19:35:51,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 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) [2021-12-14 19:35:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-12-14 19:35:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:35:51,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:51,028 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:51,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:51,246 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 [2021-12-14 19:35:51,246 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:51,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:51,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2089502829, now seen corresponding path program 1 times [2021-12-14 19:35:51,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:51,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688386470] [2021-12-14 19:35:51,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:51,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 19:35:51,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:51,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688386470] [2021-12-14 19:35:51,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688386470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:51,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:51,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:35:51,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498548372] [2021-12-14 19:35:51,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:51,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:35:51,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:51,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:35:51,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:35:51,312 INFO L87 Difference]: Start difference. First operand 55 states and 59 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) [2021-12-14 19:35:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:51,340 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-12-14 19:35:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:35:51,340 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 20 [2021-12-14 19:35:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:51,341 INFO L225 Difference]: With dead ends: 53 [2021-12-14 19:35:51,341 INFO L226 Difference]: Without dead ends: 53 [2021-12-14 19:35:51,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:35:51,342 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:51,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 59 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-14 19:35:51,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-14 19:35:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 52 states have internal predecessors, (56), 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) [2021-12-14 19:35:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-12-14 19:35:51,346 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 20 [2021-12-14 19:35:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:51,346 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-12-14 19:35:51,346 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) [2021-12-14 19:35:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-12-14 19:35:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:35:51,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:51,347 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:51,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 19:35:51,347 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2089502828, now seen corresponding path program 1 times [2021-12-14 19:35:51,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:51,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694423237] [2021-12-14 19:35:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:51,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:51,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:51,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694423237] [2021-12-14 19:35:51,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694423237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:51,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652820193] [2021-12-14 19:35:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:51,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:51,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:51,407 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) [2021-12-14 19:35:51,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 19:35:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:35:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:51,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:51,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652820193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:51,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:51,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-12-14 19:35:51,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332773572] [2021-12-14 19:35:51,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:51,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 19:35:51,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:51,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 19:35:51,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2021-12-14 19:35:51,703 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2021-12-14 19:35:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:51,870 INFO L93 Difference]: Finished difference Result 208 states and 214 transitions. [2021-12-14 19:35:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:35:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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 20 [2021-12-14 19:35:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:51,871 INFO L225 Difference]: With dead ends: 208 [2021-12-14 19:35:51,871 INFO L226 Difference]: Without dead ends: 208 [2021-12-14 19:35:51,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:35:51,872 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 458 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:51,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 254 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-14 19:35:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 80. [2021-12-14 19:35:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 79 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) [2021-12-14 19:35:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-12-14 19:35:51,878 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 20 [2021-12-14 19:35:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:51,878 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-12-14 19:35:51,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2021-12-14 19:35:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-12-14 19:35:51,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 19:35:51,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:51,879 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:51,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:52,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:52,104 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1489931692, now seen corresponding path program 2 times [2021-12-14 19:35:52,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:52,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086913338] [2021-12-14 19:35:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:52,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:35:52,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:52,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086913338] [2021-12-14 19:35:52,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086913338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:52,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995486577] [2021-12-14 19:35:52,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:35:52,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:52,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:52,260 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) [2021-12-14 19:35:52,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 19:35:52,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 19:35:52,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:35:52,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:35:52,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:52,333 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:35:52,334 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:35:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-14 19:35:52,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:35:52,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995486577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:52,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:35:52,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 16 [2021-12-14 19:35:52,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376319545] [2021-12-14 19:35:52,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:52,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:35:52,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:52,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:35:52,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:35:52,515 INFO L87 Difference]: Start difference. First operand 80 states and 86 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) [2021-12-14 19:35:52,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:52,566 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-12-14 19:35:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:35:52,567 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 38 [2021-12-14 19:35:52,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:52,569 INFO L225 Difference]: With dead ends: 74 [2021-12-14 19:35:52,569 INFO L226 Difference]: Without dead ends: 74 [2021-12-14 19:35:52,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:35:52,570 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:52,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 32 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-14 19:35:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-14 19:35:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 67 states have (on average 1.164179104477612) internal successors, (78), 73 states have internal predecessors, (78), 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) [2021-12-14 19:35:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-12-14 19:35:52,575 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 38 [2021-12-14 19:35:52,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:52,575 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-12-14 19:35:52,575 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) [2021-12-14 19:35:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-12-14 19:35:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 19:35:52,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:52,576 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:52,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:52,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:52,791 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:52,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:52,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1931943797, now seen corresponding path program 1 times [2021-12-14 19:35:52,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:52,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657361103] [2021-12-14 19:35:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:52,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:52,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:52,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657361103] [2021-12-14 19:35:52,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657361103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:52,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050408712] [2021-12-14 19:35:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:52,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:52,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:52,945 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) [2021-12-14 19:35:52,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 19:35:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:53,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:35:53,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:53,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:53,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050408712] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:53,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:53,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2021-12-14 19:35:53,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804189963] [2021-12-14 19:35:53,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:53,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 19:35:53,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 19:35:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 19:35:53,542 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 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) [2021-12-14 19:35:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:53,964 INFO L93 Difference]: Finished difference Result 387 states and 388 transitions. [2021-12-14 19:35:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 19:35:53,965 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 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 41 [2021-12-14 19:35:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:53,966 INFO L225 Difference]: With dead ends: 387 [2021-12-14 19:35:53,966 INFO L226 Difference]: Without dead ends: 387 [2021-12-14 19:35:53,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 19:35:53,968 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1193 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:53,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 348 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:35:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-14 19:35:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 128. [2021-12-14 19:35:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 121 states have (on average 1.140495867768595) internal successors, (138), 127 states have internal predecessors, (138), 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) [2021-12-14 19:35:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2021-12-14 19:35:53,974 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 41 [2021-12-14 19:35:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:53,975 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2021-12-14 19:35:53,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 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) [2021-12-14 19:35:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2021-12-14 19:35:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 19:35:53,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:53,977 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:54,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:54,194 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 [2021-12-14 19:35:54,195 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:54,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1022801419, now seen corresponding path program 2 times [2021-12-14 19:35:54,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:54,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857365028] [2021-12-14 19:35:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:54,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:54,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:54,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857365028] [2021-12-14 19:35:54,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857365028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:54,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383126703] [2021-12-14 19:35:54,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:35:54,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:54,511 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) [2021-12-14 19:35:54,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 19:35:54,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:35:54,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:35:54,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 19:35:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:55,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:55,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383126703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:55,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:55,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 73 [2021-12-14 19:35:55,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090276033] [2021-12-14 19:35:55,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:55,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-14 19:35:55,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:55,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-14 19:35:55,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=2949, Unknown=0, NotChecked=0, Total=5256 [2021-12-14 19:35:55,972 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 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) [2021-12-14 19:35:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:57,397 INFO L93 Difference]: Finished difference Result 807 states and 808 transitions. [2021-12-14 19:35:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-14 19:35:57,398 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 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 [2021-12-14 19:35:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:57,402 INFO L225 Difference]: With dead ends: 807 [2021-12-14 19:35:57,403 INFO L226 Difference]: Without dead ends: 807 [2021-12-14 19:35:57,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3217 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3480, Invalid=5640, Unknown=0, NotChecked=0, Total=9120 [2021-12-14 19:35:57,405 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 3388 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3388 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:57,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3388 Valid, 570 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 19:35:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-12-14 19:35:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 236. [2021-12-14 19:35:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 229 states have (on average 1.1266375545851528) internal successors, (258), 235 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) [2021-12-14 19:35:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 258 transitions. [2021-12-14 19:35:57,425 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 258 transitions. Word has length 77 [2021-12-14 19:35:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:57,426 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 258 transitions. [2021-12-14 19:35:57,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 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) [2021-12-14 19:35:57,426 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 258 transitions. [2021-12-14 19:35:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-14 19:35:57,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:57,430 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:57,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 19:35:57,639 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 [2021-12-14 19:35:57,639 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1581506293, now seen corresponding path program 3 times [2021-12-14 19:35:57,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:57,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948303683] [2021-12-14 19:35:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:57,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3153 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:35:58,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:58,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948303683] [2021-12-14 19:35:58,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948303683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:58,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2275959] [2021-12-14 19:35:58,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:35:58,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:58,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:58,762 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) [2021-12-14 19:35:58,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 19:35:58,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 19:35:58,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:35:58,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:35:58,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:58,876 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:35:58,877 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:35:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3153 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-12-14 19:35:59,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:35:59,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2275959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:59,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:35:59,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [50] total 54 [2021-12-14 19:35:59,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419080774] [2021-12-14 19:35:59,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:59,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:35:59,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:59,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:35:59,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1193, Invalid=1669, Unknown=0, NotChecked=0, Total=2862 [2021-12-14 19:35:59,629 INFO L87 Difference]: Start difference. First operand 236 states and 258 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-12-14 19:35:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:59,668 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2021-12-14 19:35:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:35:59,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 149 [2021-12-14 19:35:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:59,670 INFO L225 Difference]: With dead ends: 235 [2021-12-14 19:35:59,670 INFO L226 Difference]: Without dead ends: 235 [2021-12-14 19:35:59,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1193, Invalid=1669, Unknown=0, NotChecked=0, Total=2862 [2021-12-14 19:35:59,671 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:59,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 30 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-14 19:35:59,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-12-14 19:35:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 229 states have (on average 1.0305676855895196) internal successors, (236), 234 states have internal predecessors, (236), 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) [2021-12-14 19:35:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2021-12-14 19:35:59,676 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 149 [2021-12-14 19:35:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:59,676 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2021-12-14 19:35:59,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-12-14 19:35:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2021-12-14 19:35:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-14 19:35:59,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:59,686 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:59,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:59,899 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 [2021-12-14 19:35:59,900 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:35:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash -627616687, now seen corresponding path program 1 times [2021-12-14 19:35:59,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:59,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554159893] [2021-12-14 19:35:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:59,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:36:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3933 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3933 trivial. 0 not checked. [2021-12-14 19:36:00,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:36:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554159893] [2021-12-14 19:36:00,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554159893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:36:00,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:36:00,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:36:00,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323473927] [2021-12-14 19:36:00,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:36:00,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:36:00,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:36:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:36:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:36:00,089 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 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) [2021-12-14 19:36:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:36:00,098 INFO L93 Difference]: Finished difference Result 233 states and 234 transitions. [2021-12-14 19:36:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:36:00,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 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 219 [2021-12-14 19:36:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:36:00,100 INFO L225 Difference]: With dead ends: 233 [2021-12-14 19:36:00,100 INFO L226 Difference]: Without dead ends: 233 [2021-12-14 19:36:00,100 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 [2021-12-14 19:36:00,101 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:36:00,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:36:00,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-14 19:36:00,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-12-14 19:36:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.0218340611353711) internal successors, (234), 232 states have internal predecessors, (234), 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) [2021-12-14 19:36:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2021-12-14 19:36:00,105 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 219 [2021-12-14 19:36:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:36:00,106 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2021-12-14 19:36:00,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 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) [2021-12-14 19:36:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2021-12-14 19:36:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-14 19:36:00,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:36:00,112 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:36:00,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 19:36:00,113 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:36:00,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:36:00,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1857571963, now seen corresponding path program 1 times [2021-12-14 19:36:00,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:36:00,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829820880] [2021-12-14 19:36:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:36:00,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:36:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:36:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3933 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-12-14 19:36:01,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:36:01,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829820880] [2021-12-14 19:36:01,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829820880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:36:01,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039361670] [2021-12-14 19:36:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:36:01,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:36:01,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:36:01,225 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) [2021-12-14 19:36:01,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 19:36:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:36:01,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-14 19:36:01,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:36:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3933 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-12-14 19:36:03,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:36:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3933 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-12-14 19:36:05,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039361670] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:36:05,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:36:05,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 145 [2021-12-14 19:36:05,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192688930] [2021-12-14 19:36:05,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:36:05,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-12-14 19:36:05,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:36:05,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-12-14 19:36:05,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9219, Invalid=11661, Unknown=0, NotChecked=0, Total=20880 [2021-12-14 19:36:05,639 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand has 145 states, 145 states have (on average 3.013793103448276) internal successors, (437), 145 states have internal predecessors, (437), 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) [2021-12-14 19:36:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:36:09,971 INFO L93 Difference]: Finished difference Result 1461 states and 1462 transitions. [2021-12-14 19:36:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-14 19:36:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 3.013793103448276) internal successors, (437), 145 states have internal predecessors, (437), 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 221 [2021-12-14 19:36:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:36:09,975 INFO L225 Difference]: With dead ends: 1461 [2021-12-14 19:36:09,975 INFO L226 Difference]: Without dead ends: 1461 [2021-12-14 19:36:09,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13345 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13872, Invalid=22800, Unknown=0, NotChecked=0, Total=36672 [2021-12-14 19:36:09,982 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 5887 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5887 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 19:36:09,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5887 Valid, 969 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 19:36:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-12-14 19:36:09,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 449. [2021-12-14 19:36:09,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 445 states have (on average 1.0112359550561798) internal successors, (450), 448 states have internal predecessors, (450), 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) [2021-12-14 19:36:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 450 transitions. [2021-12-14 19:36:09,992 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 450 transitions. Word has length 221 [2021-12-14 19:36:09,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:36:09,993 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 450 transitions. [2021-12-14 19:36:09,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 3.013793103448276) internal successors, (437), 145 states have internal predecessors, (437), 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) [2021-12-14 19:36:09,993 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 450 transitions. [2021-12-14 19:36:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-12-14 19:36:09,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:36:09,998 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:36:10,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-14 19:36:10,211 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,SelfDestructingSolverStorable13 [2021-12-14 19:36:10,212 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-14 19:36:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:36:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1514379525, now seen corresponding path program 2 times [2021-12-14 19:36:10,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:36:10,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899924779] [2021-12-14 19:36:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:36:10,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:36:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:36:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16497 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 3290 trivial. 0 not checked. [2021-12-14 19:36:13,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:36:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899924779] [2021-12-14 19:36:13,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899924779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:36:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101243906] [2021-12-14 19:36:13,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:36:13,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:36:13,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:36:13,881 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) [2021-12-14 19:36:13,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 19:36:14,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:36:14,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:36:14,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1643 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-14 19:36:14,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:36:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16497 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 3290 trivial. 0 not checked. [2021-12-14 19:36:18,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:36:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16497 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 3290 trivial. 0 not checked. [2021-12-14 19:36:28,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101243906] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:36:28,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:36:28,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 289 [2021-12-14 19:36:28,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808622651] [2021-12-14 19:36:28,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:36:28,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 289 states [2021-12-14 19:36:28,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:36:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 289 interpolants. [2021-12-14 19:36:28,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36867, Invalid=46365, Unknown=0, NotChecked=0, Total=83232 [2021-12-14 19:36:28,467 INFO L87 Difference]: Start difference. First operand 449 states and 450 transitions. Second operand has 289 states, 289 states have (on average 3.0069204152249136) internal successors, (869), 289 states have internal predecessors, (869), 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)