./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0217_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/list-ext-properties/test-0217_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:18:15,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:18:15,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:18:15,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:18:15,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:18:15,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:18:15,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:18:15,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:18:15,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:18:15,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:18:15,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:18:15,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:18:15,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:18:15,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:18:15,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:18:15,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:18:15,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:18:15,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:18:15,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:18:15,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:18:15,652 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:18:15,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:18:15,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:18:15,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:18:15,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:18:15,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:18:15,657 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:18:15,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:18:15,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:18:15,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:18:15,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:18:15,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:18:15,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:18:15,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:18:15,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:18:15,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:18:15,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:18:15,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:18:15,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:18:15,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:18:15,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:18:15,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:18:15,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:18:15,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:18:15,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:18:15,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:18:15,682 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:18:15,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:18:15,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:18:15,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:18:15,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:18:15,683 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:18:15,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:18:15,683 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:18:15,684 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:18:15,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:18:15,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:18:15,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:18:15,684 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:18:15,684 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:18:15,685 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:18:15,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:18:15,685 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:18:15,685 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:18:15,685 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:18:15,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:18:15,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:18:15,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:18:15,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:18:15,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:18:15,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:18:15,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:18:15,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:18:15,687 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2022-07-21 17:18:15,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:18:16,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:18:16,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:18:16,010 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:18:16,011 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:18:16,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-07-21 17:18:16,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9246b385/61b6c3cbd1404d6085c48fbd0e9c5479/FLAGb985a1646 [2022-07-21 17:18:16,498 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:18:16,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-07-21 17:18:16,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9246b385/61b6c3cbd1404d6085c48fbd0e9c5479/FLAGb985a1646 [2022-07-21 17:18:16,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9246b385/61b6c3cbd1404d6085c48fbd0e9c5479 [2022-07-21 17:18:16,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:18:16,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:18:16,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:18:16,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:18:16,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:18:16,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:18:16" (1/1) ... [2022-07-21 17:18:16,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50813001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:16, skipping insertion in model container [2022-07-21 17:18:16,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:18:16" (1/1) ... [2022-07-21 17:18:16,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:18:16,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:18:17,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:18:17,142 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:18:17,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:18:17,194 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:18:17,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17 WrapperNode [2022-07-21 17:18:17,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:18:17,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:18:17,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:18:17,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:18:17,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2022-07-21 17:18:17,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2022-07-21 17:18:17,245 INFO L137 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 257 [2022-07-21 17:18:17,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:18:17,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:18:17,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:18:17,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:18:17,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2022-07-21 17:18:17,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2022-07-21 17:18:17,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2022-07-21 17:18:17,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2022-07-21 17:18:17,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2022-07-21 17:18:17,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2022-07-21 17:18:17,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2022-07-21 17:18:17,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:18:17,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:18:17,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:18:17,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:18:17,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2022-07-21 17:18:17,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:18:17,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:17,336 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) [2022-07-21 17:18:17,342 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 [2022-07-21 17:18:17,363 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-07-21 17:18:17,363 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-07-21 17:18:17,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:18:17,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:18:17,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:18:17,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:18:17,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:18:17,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:18:17,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:18:17,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 17:18:17,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:18:17,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:18:17,515 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:18:17,516 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:18:17,961 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:18:17,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:18:17,966 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 17:18:17,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:18:17 BoogieIcfgContainer [2022-07-21 17:18:17,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:18:17,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:18:17,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:18:17,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:18:17,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:18:16" (1/3) ... [2022-07-21 17:18:17,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112947d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:18:17, skipping insertion in model container [2022-07-21 17:18:17,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (2/3) ... [2022-07-21 17:18:17,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112947d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:18:17, skipping insertion in model container [2022-07-21 17:18:17,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:18:17" (3/3) ... [2022-07-21 17:18:17,974 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2022-07-21 17:18:17,983 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:18:17,984 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2022-07-21 17:18:18,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:18:18,019 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f673213, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6699f0cd [2022-07-21 17:18:18,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-07-21 17:18:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 103 states have (on average 1.9514563106796117) internal successors, (201), 170 states have internal predecessors, (201), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:18:18,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:18,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:18:18,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:18,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1046105098, now seen corresponding path program 1 times [2022-07-21 17:18:18,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:18,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550341070] [2022-07-21 17:18:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:18,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:18,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:18,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550341070] [2022-07-21 17:18:18,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550341070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:18,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:18,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:18:18,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428049751] [2022-07-21 17:18:18,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:18,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 17:18:18,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:18,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 17:18:18,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 17:18:18,173 INFO L87 Difference]: Start difference. First operand has 174 states, 103 states have (on average 1.9514563106796117) internal successors, (201), 170 states have internal predecessors, (201), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:18:18,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:18,190 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2022-07-21 17:18:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 17:18:18,192 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 17:18:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:18,197 INFO L225 Difference]: With dead ends: 174 [2022-07-21 17:18:18,197 INFO L226 Difference]: Without dead ends: 172 [2022-07-21 17:18:18,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 17:18:18,201 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:18,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:18,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-21 17:18:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-07-21 17:18:18,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 102 states have (on average 1.8823529411764706) internal successors, (192), 168 states have internal predecessors, (192), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2022-07-21 17:18:18,230 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 6 [2022-07-21 17:18:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:18,230 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2022-07-21 17:18:18,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:18:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2022-07-21 17:18:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 17:18:18,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:18,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:18,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:18:18,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash 594388414, now seen corresponding path program 1 times [2022-07-21 17:18:18,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:18,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700199717] [2022-07-21 17:18:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:18,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:18,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:18,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700199717] [2022-07-21 17:18:18,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700199717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:18,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:18,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:18:18,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121383555] [2022-07-21 17:18:18,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:18,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:18,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:18,274 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-21 17:18:18,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:18,317 INFO L93 Difference]: Finished difference Result 339 states and 387 transitions. [2022-07-21 17:18:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:18,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2022-07-21 17:18:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:18,320 INFO L225 Difference]: With dead ends: 339 [2022-07-21 17:18:18,322 INFO L226 Difference]: Without dead ends: 339 [2022-07-21 17:18:18,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:18,323 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 185 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:18,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 727 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-07-21 17:18:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 174. [2022-07-21 17:18:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 104 states have (on average 1.8653846153846154) internal successors, (194), 170 states have internal predecessors, (194), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 198 transitions. [2022-07-21 17:18:18,340 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 198 transitions. Word has length 8 [2022-07-21 17:18:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:18,341 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 198 transitions. [2022-07-21 17:18:18,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-21 17:18:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 198 transitions. [2022-07-21 17:18:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 17:18:18,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:18,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:18,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:18:18,345 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:18,346 INFO L85 PathProgramCache]: Analyzing trace with hash 592541372, now seen corresponding path program 1 times [2022-07-21 17:18:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:18,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989660072] [2022-07-21 17:18:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:18,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:18,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:18,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989660072] [2022-07-21 17:18:18,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989660072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:18,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:18,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-21 17:18:18,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078849779] [2022-07-21 17:18:18,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:18,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:18:18,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:18,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:18:18,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:18:18,422 INFO L87 Difference]: Start difference. First operand 174 states and 198 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-07-21 17:18:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:18,589 INFO L93 Difference]: Finished difference Result 337 states and 384 transitions. [2022-07-21 17:18:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:18:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-07-21 17:18:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:18,591 INFO L225 Difference]: With dead ends: 337 [2022-07-21 17:18:18,592 INFO L226 Difference]: Without dead ends: 337 [2022-07-21 17:18:18,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:18:18,593 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 176 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:18,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 261 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-21 17:18:18,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 241. [2022-07-21 17:18:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 168 states have (on average 1.8571428571428572) internal successors, (312), 234 states have internal predecessors, (312), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:18:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 320 transitions. [2022-07-21 17:18:18,618 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 320 transitions. Word has length 8 [2022-07-21 17:18:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:18,618 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 320 transitions. [2022-07-21 17:18:18,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-07-21 17:18:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 320 transitions. [2022-07-21 17:18:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 17:18:18,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:18,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:18,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:18:18,620 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash 592541373, now seen corresponding path program 1 times [2022-07-21 17:18:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:18,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694573023] [2022-07-21 17:18:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:18,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:18,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:18,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694573023] [2022-07-21 17:18:18,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694573023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:18,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:18,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:18:18,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113410603] [2022-07-21 17:18:18,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:18,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:18,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:18,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:18,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:18,745 INFO L87 Difference]: Start difference. First operand 241 states and 320 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-07-21 17:18:18,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:18,883 INFO L93 Difference]: Finished difference Result 392 states and 502 transitions. [2022-07-21 17:18:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:18,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-07-21 17:18:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:18,885 INFO L225 Difference]: With dead ends: 392 [2022-07-21 17:18:18,885 INFO L226 Difference]: Without dead ends: 392 [2022-07-21 17:18:18,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:18,886 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 147 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:18,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 440 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:18,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-21 17:18:18,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 326. [2022-07-21 17:18:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 247 states have (on average 1.8178137651821862) internal successors, (449), 315 states have internal predecessors, (449), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:18:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 465 transitions. [2022-07-21 17:18:18,896 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 465 transitions. Word has length 8 [2022-07-21 17:18:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:18,897 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 465 transitions. [2022-07-21 17:18:18,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-07-21 17:18:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 465 transitions. [2022-07-21 17:18:18,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 17:18:18,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:18,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:18:18,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash 592541435, now seen corresponding path program 1 times [2022-07-21 17:18:18,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:18,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939647906] [2022-07-21 17:18:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:18,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:18,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939647906] [2022-07-21 17:18:18,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939647906] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:18,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:18,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:18:18,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333584304] [2022-07-21 17:18:18,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:18,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:18,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:18,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:18,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:18,998 INFO L87 Difference]: Start difference. First operand 326 states and 465 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-07-21 17:18:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:19,135 INFO L93 Difference]: Finished difference Result 391 states and 500 transitions. [2022-07-21 17:18:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:19,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-07-21 17:18:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:19,137 INFO L225 Difference]: With dead ends: 391 [2022-07-21 17:18:19,137 INFO L226 Difference]: Without dead ends: 391 [2022-07-21 17:18:19,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:19,138 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 129 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:19,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 454 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-07-21 17:18:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 326. [2022-07-21 17:18:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 247 states have (on average 1.8178137651821862) internal successors, (449), 315 states have internal predecessors, (449), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:18:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 465 transitions. [2022-07-21 17:18:19,145 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 465 transitions. Word has length 8 [2022-07-21 17:18:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:19,145 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 465 transitions. [2022-07-21 17:18:19,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-07-21 17:18:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 465 transitions. [2022-07-21 17:18:19,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:18:19,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:19,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:19,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 17:18:19,146 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:19,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:19,147 INFO L85 PathProgramCache]: Analyzing trace with hash 84699063, now seen corresponding path program 1 times [2022-07-21 17:18:19,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:19,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826848979] [2022-07-21 17:18:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:19,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:19,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:19,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826848979] [2022-07-21 17:18:19,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826848979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:19,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:19,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:18:19,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078265948] [2022-07-21 17:18:19,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:19,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:18:19,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:18:19,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:18:19,167 INFO L87 Difference]: Start difference. First operand 326 states and 465 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:18:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:19,177 INFO L93 Difference]: Finished difference Result 467 states and 621 transitions. [2022-07-21 17:18:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:18:19,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 17:18:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:19,179 INFO L225 Difference]: With dead ends: 467 [2022-07-21 17:18:19,179 INFO L226 Difference]: Without dead ends: 467 [2022-07-21 17:18:19,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:18:19,180 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 167 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:19,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 384 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-07-21 17:18:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 328. [2022-07-21 17:18:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 249 states have (on average 1.8032128514056225) internal successors, (449), 317 states have internal predecessors, (449), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:18:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 465 transitions. [2022-07-21 17:18:19,196 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 465 transitions. Word has length 11 [2022-07-21 17:18:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:19,197 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 465 transitions. [2022-07-21 17:18:19,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:18:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 465 transitions. [2022-07-21 17:18:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:18:19,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:19,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:19,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 17:18:19,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:19,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:19,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1669297564, now seen corresponding path program 1 times [2022-07-21 17:18:19,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:19,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562492616] [2022-07-21 17:18:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:19,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:19,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:19,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562492616] [2022-07-21 17:18:19,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562492616] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:19,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:19,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:18:19,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432805388] [2022-07-21 17:18:19,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:19,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:18:19,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:18:19,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:18:19,221 INFO L87 Difference]: Start difference. First operand 328 states and 465 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-21 17:18:19,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:19,294 INFO L93 Difference]: Finished difference Result 383 states and 518 transitions. [2022-07-21 17:18:19,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:18:19,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2022-07-21 17:18:19,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:19,297 INFO L225 Difference]: With dead ends: 383 [2022-07-21 17:18:19,297 INFO L226 Difference]: Without dead ends: 376 [2022-07-21 17:18:19,297 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:18:19,300 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 77 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:19,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 299 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-07-21 17:18:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 325. [2022-07-21 17:18:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 246 states have (on average 1.8048780487804879) internal successors, (444), 314 states have internal predecessors, (444), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:18:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 460 transitions. [2022-07-21 17:18:19,309 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 460 transitions. Word has length 12 [2022-07-21 17:18:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:19,309 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 460 transitions. [2022-07-21 17:18:19,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-21 17:18:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 460 transitions. [2022-07-21 17:18:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 17:18:19,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:19,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:19,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 17:18:19,311 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash 79488163, now seen corresponding path program 1 times [2022-07-21 17:18:19,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:19,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037091034] [2022-07-21 17:18:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:19,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:19,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:19,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037091034] [2022-07-21 17:18:19,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037091034] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:19,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:19,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:18:19,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799125741] [2022-07-21 17:18:19,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:19,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:19,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:19,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:19,340 INFO L87 Difference]: Start difference. First operand 325 states and 460 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:19,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:19,358 INFO L93 Difference]: Finished difference Result 527 states and 732 transitions. [2022-07-21 17:18:19,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:19,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-21 17:18:19,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:19,360 INFO L225 Difference]: With dead ends: 527 [2022-07-21 17:18:19,360 INFO L226 Difference]: Without dead ends: 527 [2022-07-21 17:18:19,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:19,361 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 181 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:19,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 552 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:19,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-07-21 17:18:19,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 329. [2022-07-21 17:18:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 250 states have (on average 1.784) internal successors, (446), 318 states have internal predecessors, (446), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:18:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 462 transitions. [2022-07-21 17:18:19,374 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 462 transitions. Word has length 17 [2022-07-21 17:18:19,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:19,374 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 462 transitions. [2022-07-21 17:18:19,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:19,375 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 462 transitions. [2022-07-21 17:18:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 17:18:19,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:19,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:19,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 17:18:19,376 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:19,376 INFO L85 PathProgramCache]: Analyzing trace with hash -621576415, now seen corresponding path program 1 times [2022-07-21 17:18:19,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:19,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991177883] [2022-07-21 17:18:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:19,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:19,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:19,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991177883] [2022-07-21 17:18:19,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991177883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:19,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:19,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:18:19,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614104223] [2022-07-21 17:18:19,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:19,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:18:19,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:19,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:18:19,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:18:19,406 INFO L87 Difference]: Start difference. First operand 329 states and 462 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:19,412 INFO L93 Difference]: Finished difference Result 333 states and 466 transitions. [2022-07-21 17:18:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:18:19,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-21 17:18:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:19,420 INFO L225 Difference]: With dead ends: 333 [2022-07-21 17:18:19,421 INFO L226 Difference]: Without dead ends: 333 [2022-07-21 17:18:19,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:18:19,423 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:19,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 385 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-21 17:18:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-07-21 17:18:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 254 states have (on average 1.7716535433070866) internal successors, (450), 322 states have internal predecessors, (450), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:18:19,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 466 transitions. [2022-07-21 17:18:19,431 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 466 transitions. Word has length 17 [2022-07-21 17:18:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:19,431 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 466 transitions. [2022-07-21 17:18:19,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 466 transitions. [2022-07-21 17:18:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 17:18:19,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:19,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:19,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 17:18:19,433 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash 187770211, now seen corresponding path program 1 times [2022-07-21 17:18:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:19,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658758622] [2022-07-21 17:18:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:19,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:19,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:19,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658758622] [2022-07-21 17:18:19,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658758622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:19,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:19,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:18:19,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251399101] [2022-07-21 17:18:19,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:19,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:19,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:19,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:19,487 INFO L87 Difference]: Start difference. First operand 333 states and 466 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:19,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:19,688 INFO L93 Difference]: Finished difference Result 566 states and 714 transitions. [2022-07-21 17:18:19,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:19,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-21 17:18:19,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:19,690 INFO L225 Difference]: With dead ends: 566 [2022-07-21 17:18:19,690 INFO L226 Difference]: Without dead ends: 566 [2022-07-21 17:18:19,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:19,691 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 340 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:19,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 458 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:18:19,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-07-21 17:18:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 339. [2022-07-21 17:18:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 260 states have (on average 1.7538461538461538) internal successors, (456), 328 states have internal predecessors, (456), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:18:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 472 transitions. [2022-07-21 17:18:19,699 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 472 transitions. Word has length 17 [2022-07-21 17:18:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:19,699 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 472 transitions. [2022-07-21 17:18:19,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 472 transitions. [2022-07-21 17:18:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 17:18:19,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:19,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:19,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 17:18:19,700 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:19,701 INFO L85 PathProgramCache]: Analyzing trace with hash 187770212, now seen corresponding path program 1 times [2022-07-21 17:18:19,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:19,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668116040] [2022-07-21 17:18:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:19,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:19,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:19,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668116040] [2022-07-21 17:18:19,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668116040] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:19,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:19,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:18:19,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69647996] [2022-07-21 17:18:19,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:19,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:19,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:19,748 INFO L87 Difference]: Start difference. First operand 339 states and 472 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:19,904 INFO L93 Difference]: Finished difference Result 386 states and 491 transitions. [2022-07-21 17:18:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:19,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-21 17:18:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:19,905 INFO L225 Difference]: With dead ends: 386 [2022-07-21 17:18:19,905 INFO L226 Difference]: Without dead ends: 386 [2022-07-21 17:18:19,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:19,906 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 184 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:19,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 460 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-07-21 17:18:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 339. [2022-07-21 17:18:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 260 states have (on average 1.7307692307692308) internal successors, (450), 328 states have internal predecessors, (450), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:18:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 466 transitions. [2022-07-21 17:18:19,912 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 466 transitions. Word has length 17 [2022-07-21 17:18:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:19,912 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 466 transitions. [2022-07-21 17:18:19,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:19,913 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 466 transitions. [2022-07-21 17:18:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:18:19,913 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:19,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:19,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 17:18:19,914 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:19,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1574138016, now seen corresponding path program 1 times [2022-07-21 17:18:19,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:19,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461027325] [2022-07-21 17:18:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:19,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:19,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:19,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461027325] [2022-07-21 17:18:19,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461027325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:19,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:19,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:18:19,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956165099] [2022-07-21 17:18:19,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:19,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:18:19,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:19,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:18:19,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:19,952 INFO L87 Difference]: Start difference. First operand 339 states and 466 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:20,218 INFO L93 Difference]: Finished difference Result 704 states and 839 transitions. [2022-07-21 17:18:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:18:20,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-21 17:18:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:20,221 INFO L225 Difference]: With dead ends: 704 [2022-07-21 17:18:20,221 INFO L226 Difference]: Without dead ends: 704 [2022-07-21 17:18:20,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:18:20,221 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 894 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:20,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 562 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:18:20,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-07-21 17:18:20,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 336. [2022-07-21 17:18:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 261 states have (on average 1.7011494252873562) internal successors, (444), 325 states have internal predecessors, (444), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:18:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 460 transitions. [2022-07-21 17:18:20,229 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 460 transitions. Word has length 18 [2022-07-21 17:18:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:20,229 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 460 transitions. [2022-07-21 17:18:20,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 460 transitions. [2022-07-21 17:18:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:18:20,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:20,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:20,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 17:18:20,230 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:20,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:20,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1574138017, now seen corresponding path program 1 times [2022-07-21 17:18:20,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:20,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659127328] [2022-07-21 17:18:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:20,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:20,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:20,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:20,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659127328] [2022-07-21 17:18:20,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659127328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:20,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:20,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:18:20,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325706580] [2022-07-21 17:18:20,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:20,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:20,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:20,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:20,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:20,320 INFO L87 Difference]: Start difference. First operand 336 states and 460 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:20,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:20,752 INFO L93 Difference]: Finished difference Result 686 states and 840 transitions. [2022-07-21 17:18:20,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:18:20,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-21 17:18:20,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:20,754 INFO L225 Difference]: With dead ends: 686 [2022-07-21 17:18:20,754 INFO L226 Difference]: Without dead ends: 686 [2022-07-21 17:18:20,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:18:20,755 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 640 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:20,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 735 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:18:20,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-07-21 17:18:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 356. [2022-07-21 17:18:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 281 states have (on average 1.704626334519573) internal successors, (479), 345 states have internal predecessors, (479), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 17:18:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 495 transitions. [2022-07-21 17:18:20,761 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 495 transitions. Word has length 18 [2022-07-21 17:18:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:20,761 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 495 transitions. [2022-07-21 17:18:20,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 495 transitions. [2022-07-21 17:18:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:18:20,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:20,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:20,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 17:18:20,762 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:20,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:20,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1870398950, now seen corresponding path program 1 times [2022-07-21 17:18:20,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:20,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329762230] [2022-07-21 17:18:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:20,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:20,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:20,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:20,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329762230] [2022-07-21 17:18:20,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329762230] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:20,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:20,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 17:18:20,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321078278] [2022-07-21 17:18:20,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:20,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:18:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:18:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:18:20,933 INFO L87 Difference]: Start difference. First operand 356 states and 495 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:21,197 INFO L93 Difference]: Finished difference Result 544 states and 724 transitions. [2022-07-21 17:18:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:18:21,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-07-21 17:18:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:21,199 INFO L225 Difference]: With dead ends: 544 [2022-07-21 17:18:21,199 INFO L226 Difference]: Without dead ends: 544 [2022-07-21 17:18:21,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:18:21,199 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 202 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:21,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 988 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:18:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-07-21 17:18:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 415. [2022-07-21 17:18:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 337 states have (on average 1.6706231454005935) internal successors, (563), 400 states have internal predecessors, (563), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:18:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 583 transitions. [2022-07-21 17:18:21,208 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 583 transitions. Word has length 22 [2022-07-21 17:18:21,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:21,208 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 583 transitions. [2022-07-21 17:18:21,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 583 transitions. [2022-07-21 17:18:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:18:21,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:21,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:21,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 17:18:21,209 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash -189481273, now seen corresponding path program 1 times [2022-07-21 17:18:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:21,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500511335] [2022-07-21 17:18:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:21,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:21,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:21,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:21,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500511335] [2022-07-21 17:18:21,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500511335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:21,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:21,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 17:18:21,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659074014] [2022-07-21 17:18:21,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:21,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:18:21,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:21,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:18:21,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:18:21,432 INFO L87 Difference]: Start difference. First operand 415 states and 583 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:21,953 INFO L93 Difference]: Finished difference Result 766 states and 1047 transitions. [2022-07-21 17:18:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:18:21,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-07-21 17:18:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:21,955 INFO L225 Difference]: With dead ends: 766 [2022-07-21 17:18:21,956 INFO L226 Difference]: Without dead ends: 764 [2022-07-21 17:18:21,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:18:21,956 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 549 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:21,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1684 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:18:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-07-21 17:18:21,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 409. [2022-07-21 17:18:21,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 331 states have (on average 1.6676737160120847) internal successors, (552), 394 states have internal predecessors, (552), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:18:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 572 transitions. [2022-07-21 17:18:21,964 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 572 transitions. Word has length 23 [2022-07-21 17:18:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:21,964 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 572 transitions. [2022-07-21 17:18:21,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 572 transitions. [2022-07-21 17:18:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:18:21,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:21,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:21,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 17:18:21,965 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:21,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:21,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1937391848, now seen corresponding path program 1 times [2022-07-21 17:18:21,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:21,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162201120] [2022-07-21 17:18:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:21,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:22,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:22,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162201120] [2022-07-21 17:18:22,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162201120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:22,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:22,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:18:22,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424803037] [2022-07-21 17:18:22,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:22,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:22,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:22,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:22,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:22,012 INFO L87 Difference]: Start difference. First operand 409 states and 572 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:22,037 INFO L93 Difference]: Finished difference Result 442 states and 575 transitions. [2022-07-21 17:18:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:18:22,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-07-21 17:18:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:22,039 INFO L225 Difference]: With dead ends: 442 [2022-07-21 17:18:22,039 INFO L226 Difference]: Without dead ends: 442 [2022-07-21 17:18:22,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:18:22,040 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 252 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:22,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1131 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:22,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-07-21 17:18:22,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 409. [2022-07-21 17:18:22,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 331 states have (on average 1.661631419939577) internal successors, (550), 394 states have internal predecessors, (550), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:18:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 570 transitions. [2022-07-21 17:18:22,047 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 570 transitions. Word has length 23 [2022-07-21 17:18:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:22,047 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 570 transitions. [2022-07-21 17:18:22,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 570 transitions. [2022-07-21 17:18:22,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:18:22,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:22,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:22,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 17:18:22,048 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:22,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:22,048 INFO L85 PathProgramCache]: Analyzing trace with hash -582568086, now seen corresponding path program 1 times [2022-07-21 17:18:22,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:22,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814699986] [2022-07-21 17:18:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:22,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:22,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814699986] [2022-07-21 17:18:22,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814699986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:22,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:22,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:18:22,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825062252] [2022-07-21 17:18:22,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:22,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:22,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:22,104 INFO L87 Difference]: Start difference. First operand 409 states and 570 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:22,130 INFO L93 Difference]: Finished difference Result 438 states and 567 transitions. [2022-07-21 17:18:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:18:22,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-07-21 17:18:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:22,131 INFO L225 Difference]: With dead ends: 438 [2022-07-21 17:18:22,131 INFO L226 Difference]: Without dead ends: 438 [2022-07-21 17:18:22,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:18:22,132 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 249 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:22,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1127 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-07-21 17:18:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 407. [2022-07-21 17:18:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 329 states have (on average 1.6534954407294833) internal successors, (544), 392 states have internal predecessors, (544), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:18:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 564 transitions. [2022-07-21 17:18:22,139 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 564 transitions. Word has length 23 [2022-07-21 17:18:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:22,139 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 564 transitions. [2022-07-21 17:18:22,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 564 transitions. [2022-07-21 17:18:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 17:18:22,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:22,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:22,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 17:18:22,140 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2129210531, now seen corresponding path program 1 times [2022-07-21 17:18:22,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:22,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512817614] [2022-07-21 17:18:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:22,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:22,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:22,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512817614] [2022-07-21 17:18:22,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512817614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:22,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:22,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:18:22,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271134449] [2022-07-21 17:18:22,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:22,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:18:22,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:22,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:18:22,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:18:22,159 INFO L87 Difference]: Start difference. First operand 407 states and 564 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:22,231 INFO L93 Difference]: Finished difference Result 499 states and 664 transitions. [2022-07-21 17:18:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:18:22,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-07-21 17:18:22,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:22,233 INFO L225 Difference]: With dead ends: 499 [2022-07-21 17:18:22,233 INFO L226 Difference]: Without dead ends: 499 [2022-07-21 17:18:22,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:18:22,233 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 156 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:22,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 291 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-07-21 17:18:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 404. [2022-07-21 17:18:22,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 329 states have (on average 1.6261398176291793) internal successors, (535), 389 states have internal predecessors, (535), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:18:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 555 transitions. [2022-07-21 17:18:22,240 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 555 transitions. Word has length 24 [2022-07-21 17:18:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:22,240 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 555 transitions. [2022-07-21 17:18:22,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 555 transitions. [2022-07-21 17:18:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 17:18:22,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:22,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:22,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 17:18:22,241 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:22,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2129210530, now seen corresponding path program 1 times [2022-07-21 17:18:22,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:22,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713089973] [2022-07-21 17:18:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:22,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:22,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:22,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713089973] [2022-07-21 17:18:22,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713089973] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:22,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:22,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:18:22,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558511005] [2022-07-21 17:18:22,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:22,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:22,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:22,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:22,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:22,275 INFO L87 Difference]: Start difference. First operand 404 states and 555 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:22,352 INFO L93 Difference]: Finished difference Result 433 states and 552 transitions. [2022-07-21 17:18:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:22,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-07-21 17:18:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:22,354 INFO L225 Difference]: With dead ends: 433 [2022-07-21 17:18:22,354 INFO L226 Difference]: Without dead ends: 433 [2022-07-21 17:18:22,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:22,355 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 173 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:22,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 382 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-07-21 17:18:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 402. [2022-07-21 17:18:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 329 states have (on average 1.6079027355623101) internal successors, (529), 387 states have internal predecessors, (529), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:18:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 549 transitions. [2022-07-21 17:18:22,361 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 549 transitions. Word has length 24 [2022-07-21 17:18:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:22,361 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 549 transitions. [2022-07-21 17:18:22,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 549 transitions. [2022-07-21 17:18:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:18:22,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:22,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:22,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 17:18:22,362 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:22,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:22,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1695234990, now seen corresponding path program 1 times [2022-07-21 17:18:22,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:22,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041826588] [2022-07-21 17:18:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:22,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:22,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:22,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041826588] [2022-07-21 17:18:22,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041826588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:22,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:22,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:18:22,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295320470] [2022-07-21 17:18:22,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:22,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:22,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:22,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:22,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:22,390 INFO L87 Difference]: Start difference. First operand 402 states and 549 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:22,553 INFO L93 Difference]: Finished difference Result 635 states and 810 transitions. [2022-07-21 17:18:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:22,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-21 17:18:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:22,555 INFO L225 Difference]: With dead ends: 635 [2022-07-21 17:18:22,555 INFO L226 Difference]: Without dead ends: 635 [2022-07-21 17:18:22,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:22,556 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 298 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:22,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 446 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-07-21 17:18:22,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 430. [2022-07-21 17:18:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 415 states have internal predecessors, (581), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:18:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 601 transitions. [2022-07-21 17:18:22,563 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 601 transitions. Word has length 25 [2022-07-21 17:18:22,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:22,563 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 601 transitions. [2022-07-21 17:18:22,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 601 transitions. [2022-07-21 17:18:22,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:18:22,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:22,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:22,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 17:18:22,564 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1695234989, now seen corresponding path program 1 times [2022-07-21 17:18:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:22,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615251943] [2022-07-21 17:18:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:22,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:22,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:22,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615251943] [2022-07-21 17:18:22,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615251943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:22,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:22,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:18:22,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493906243] [2022-07-21 17:18:22,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:22,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:22,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:22,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:22,646 INFO L87 Difference]: Start difference. First operand 430 states and 601 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:22,851 INFO L93 Difference]: Finished difference Result 473 states and 616 transitions. [2022-07-21 17:18:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:18:22,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-07-21 17:18:22,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:22,853 INFO L225 Difference]: With dead ends: 473 [2022-07-21 17:18:22,853 INFO L226 Difference]: Without dead ends: 473 [2022-07-21 17:18:22,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:18:22,854 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 258 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:22,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 651 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:18:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-07-21 17:18:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 430. [2022-07-21 17:18:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 357 states have (on average 1.6022408963585435) internal successors, (572), 415 states have internal predecessors, (572), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:18:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 592 transitions. [2022-07-21 17:18:22,860 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 592 transitions. Word has length 25 [2022-07-21 17:18:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:22,861 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 592 transitions. [2022-07-21 17:18:22,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,861 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 592 transitions. [2022-07-21 17:18:22,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 17:18:22,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:22,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:22,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 17:18:22,862 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:22,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:22,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1766884672, now seen corresponding path program 1 times [2022-07-21 17:18:22,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:22,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79858175] [2022-07-21 17:18:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:22,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:22,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:22,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79858175] [2022-07-21 17:18:22,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79858175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:22,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:22,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:18:22,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964081000] [2022-07-21 17:18:22,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:22,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:22,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:22,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:22,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:22,918 INFO L87 Difference]: Start difference. First operand 430 states and 592 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:22,979 INFO L93 Difference]: Finished difference Result 457 states and 592 transitions. [2022-07-21 17:18:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-07-21 17:18:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:22,982 INFO L225 Difference]: With dead ends: 457 [2022-07-21 17:18:22,982 INFO L226 Difference]: Without dead ends: 457 [2022-07-21 17:18:22,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:22,983 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 334 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:22,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 298 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-07-21 17:18:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 429. [2022-07-21 17:18:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 357 states have (on average 1.5938375350140057) internal successors, (569), 414 states have internal predecessors, (569), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:18:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 589 transitions. [2022-07-21 17:18:22,989 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 589 transitions. Word has length 26 [2022-07-21 17:18:22,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:22,989 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 589 transitions. [2022-07-21 17:18:22,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:22,989 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 589 transitions. [2022-07-21 17:18:22,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 17:18:22,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:22,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:22,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 17:18:22,990 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:22,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:22,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1766884865, now seen corresponding path program 1 times [2022-07-21 17:18:22,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:22,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857627094] [2022-07-21 17:18:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:22,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:23,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:23,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:23,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857627094] [2022-07-21 17:18:23,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857627094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:23,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:23,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:18:23,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960051537] [2022-07-21 17:18:23,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:23,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:18:23,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:23,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:18:23,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:18:23,067 INFO L87 Difference]: Start difference. First operand 429 states and 589 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:23,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:23,227 INFO L93 Difference]: Finished difference Result 649 states and 872 transitions. [2022-07-21 17:18:23,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:18:23,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-07-21 17:18:23,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:23,229 INFO L225 Difference]: With dead ends: 649 [2022-07-21 17:18:23,229 INFO L226 Difference]: Without dead ends: 649 [2022-07-21 17:18:23,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:18:23,230 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 160 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:23,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1315 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-07-21 17:18:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 459. [2022-07-21 17:18:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 387 states have (on average 1.5607235142118863) internal successors, (604), 444 states have internal predecessors, (604), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:18:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 624 transitions. [2022-07-21 17:18:23,237 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 624 transitions. Word has length 26 [2022-07-21 17:18:23,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:23,237 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 624 transitions. [2022-07-21 17:18:23,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 624 transitions. [2022-07-21 17:18:23,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:18:23,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:23,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:23,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 17:18:23,238 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash -808600231, now seen corresponding path program 1 times [2022-07-21 17:18:23,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:23,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879365806] [2022-07-21 17:18:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:23,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:23,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:23,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:23,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879365806] [2022-07-21 17:18:23,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879365806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:23,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:23,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:18:23,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285420642] [2022-07-21 17:18:23,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:23,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:18:23,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:23,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:18:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:23,278 INFO L87 Difference]: Start difference. First operand 459 states and 624 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:23,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:23,392 INFO L93 Difference]: Finished difference Result 530 states and 691 transitions. [2022-07-21 17:18:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:18:23,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-07-21 17:18:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:23,394 INFO L225 Difference]: With dead ends: 530 [2022-07-21 17:18:23,394 INFO L226 Difference]: Without dead ends: 530 [2022-07-21 17:18:23,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:18:23,394 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 168 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:23,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 676 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-07-21 17:18:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 459. [2022-07-21 17:18:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 387 states have (on average 1.558139534883721) internal successors, (603), 444 states have internal predecessors, (603), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:18:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 623 transitions. [2022-07-21 17:18:23,407 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 623 transitions. Word has length 29 [2022-07-21 17:18:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:23,407 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 623 transitions. [2022-07-21 17:18:23,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:23,408 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 623 transitions. [2022-07-21 17:18:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 17:18:23,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:23,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:23,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 17:18:23,408 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:23,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:23,409 INFO L85 PathProgramCache]: Analyzing trace with hash 703196873, now seen corresponding path program 1 times [2022-07-21 17:18:23,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:23,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518827617] [2022-07-21 17:18:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:23,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:23,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:23,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:23,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518827617] [2022-07-21 17:18:23,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518827617] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:23,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:23,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:18:23,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227706465] [2022-07-21 17:18:23,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:23,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:18:23,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:23,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:18:23,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:23,471 INFO L87 Difference]: Start difference. First operand 459 states and 623 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:23,600 INFO L93 Difference]: Finished difference Result 595 states and 780 transitions. [2022-07-21 17:18:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:18:23,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-21 17:18:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:23,602 INFO L225 Difference]: With dead ends: 595 [2022-07-21 17:18:23,602 INFO L226 Difference]: Without dead ends: 595 [2022-07-21 17:18:23,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:18:23,603 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 199 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:23,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 667 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-07-21 17:18:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 500. [2022-07-21 17:18:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 425 states have (on average 1.5482352941176472) internal successors, (658), 483 states have internal predecessors, (658), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:18:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 682 transitions. [2022-07-21 17:18:23,610 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 682 transitions. Word has length 30 [2022-07-21 17:18:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:23,610 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 682 transitions. [2022-07-21 17:18:23,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 682 transitions. [2022-07-21 17:18:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 17:18:23,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:23,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:23,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 17:18:23,611 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2144668882, now seen corresponding path program 1 times [2022-07-21 17:18:23,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:23,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631372582] [2022-07-21 17:18:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:23,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:23,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:23,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:23,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631372582] [2022-07-21 17:18:23,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631372582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:23,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:23,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:18:23,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392671628] [2022-07-21 17:18:23,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:23,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:18:23,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:23,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:18:23,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:18:23,668 INFO L87 Difference]: Start difference. First operand 500 states and 682 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:23,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:23,849 INFO L93 Difference]: Finished difference Result 855 states and 1109 transitions. [2022-07-21 17:18:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:18:23,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-07-21 17:18:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:23,852 INFO L225 Difference]: With dead ends: 855 [2022-07-21 17:18:23,852 INFO L226 Difference]: Without dead ends: 855 [2022-07-21 17:18:23,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:18:23,852 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 514 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:23,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 1517 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:23,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-07-21 17:18:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 497. [2022-07-21 17:18:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 425 states have (on average 1.5058823529411764) internal successors, (640), 480 states have internal predecessors, (640), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 17:18:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 664 transitions. [2022-07-21 17:18:23,861 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 664 transitions. Word has length 32 [2022-07-21 17:18:23,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:23,861 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 664 transitions. [2022-07-21 17:18:23,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 664 transitions. [2022-07-21 17:18:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 17:18:23,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:23,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:23,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 17:18:23,861 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:23,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:23,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1462337803, now seen corresponding path program 1 times [2022-07-21 17:18:23,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:23,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224350539] [2022-07-21 17:18:23,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:23,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:23,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:23,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:23,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224350539] [2022-07-21 17:18:23,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224350539] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:23,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:23,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:18:23,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183204597] [2022-07-21 17:18:23,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:23,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:23,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:23,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:23,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:23,940 INFO L87 Difference]: Start difference. First operand 497 states and 664 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:24,311 INFO L93 Difference]: Finished difference Result 877 states and 1128 transitions. [2022-07-21 17:18:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:18:24,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-07-21 17:18:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:24,314 INFO L225 Difference]: With dead ends: 877 [2022-07-21 17:18:24,314 INFO L226 Difference]: Without dead ends: 877 [2022-07-21 17:18:24,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:18:24,314 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 428 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:24,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 1076 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:18:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-07-21 17:18:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 534. [2022-07-21 17:18:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 459 states have (on average 1.4880174291938997) internal successors, (683), 515 states have internal predecessors, (683), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:18:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 711 transitions. [2022-07-21 17:18:24,323 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 711 transitions. Word has length 32 [2022-07-21 17:18:24,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:24,324 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 711 transitions. [2022-07-21 17:18:24,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:24,324 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 711 transitions. [2022-07-21 17:18:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 17:18:24,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:24,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:24,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-21 17:18:24,325 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:24,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1912168099, now seen corresponding path program 1 times [2022-07-21 17:18:24,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:24,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807499599] [2022-07-21 17:18:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:24,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:24,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:24,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807499599] [2022-07-21 17:18:24,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807499599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:24,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:24,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:18:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36984765] [2022-07-21 17:18:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:24,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:18:24,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:18:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:18:24,422 INFO L87 Difference]: Start difference. First operand 534 states and 711 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:24,761 INFO L93 Difference]: Finished difference Result 667 states and 839 transitions. [2022-07-21 17:18:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:18:24,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-07-21 17:18:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:24,771 INFO L225 Difference]: With dead ends: 667 [2022-07-21 17:18:24,771 INFO L226 Difference]: Without dead ends: 667 [2022-07-21 17:18:24,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:18:24,771 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 388 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:24,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 809 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:18:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-07-21 17:18:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 534. [2022-07-21 17:18:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 459 states have (on average 1.4793028322440087) internal successors, (679), 515 states have internal predecessors, (679), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:18:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 707 transitions. [2022-07-21 17:18:24,778 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 707 transitions. Word has length 33 [2022-07-21 17:18:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:24,779 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 707 transitions. [2022-07-21 17:18:24,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 707 transitions. [2022-07-21 17:18:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 17:18:24,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:24,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:24,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-21 17:18:24,779 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash -557500014, now seen corresponding path program 1 times [2022-07-21 17:18:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:24,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464127185] [2022-07-21 17:18:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:24,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:24,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:24,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:24,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464127185] [2022-07-21 17:18:24,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464127185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:24,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:24,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:18:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014048307] [2022-07-21 17:18:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:24,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:24,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:24,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:24,924 INFO L87 Difference]: Start difference. First operand 534 states and 707 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:25,072 INFO L93 Difference]: Finished difference Result 579 states and 753 transitions. [2022-07-21 17:18:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:18:25,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-07-21 17:18:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:25,075 INFO L225 Difference]: With dead ends: 579 [2022-07-21 17:18:25,075 INFO L226 Difference]: Without dead ends: 579 [2022-07-21 17:18:25,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:18:25,076 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 111 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:25,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 851 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-07-21 17:18:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 534. [2022-07-21 17:18:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 459 states have (on average 1.477124183006536) internal successors, (678), 515 states have internal predecessors, (678), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:18:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 706 transitions. [2022-07-21 17:18:25,096 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 706 transitions. Word has length 34 [2022-07-21 17:18:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:25,096 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 706 transitions. [2022-07-21 17:18:25,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 706 transitions. [2022-07-21 17:18:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 17:18:25,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:25,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:25,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-21 17:18:25,097 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1394937876, now seen corresponding path program 1 times [2022-07-21 17:18:25,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:25,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792069980] [2022-07-21 17:18:25,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:25,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:25,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:25,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792069980] [2022-07-21 17:18:25,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792069980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:25,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:25,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:18:25,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638227977] [2022-07-21 17:18:25,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:25,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:25,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:25,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:25,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:25,139 INFO L87 Difference]: Start difference. First operand 534 states and 706 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:25,305 INFO L93 Difference]: Finished difference Result 625 states and 808 transitions. [2022-07-21 17:18:25,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:18:25,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-07-21 17:18:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:25,307 INFO L225 Difference]: With dead ends: 625 [2022-07-21 17:18:25,307 INFO L226 Difference]: Without dead ends: 625 [2022-07-21 17:18:25,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:18:25,308 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 493 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:25,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 579 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-07-21 17:18:25,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 533. [2022-07-21 17:18:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 459 states have (on average 1.4727668845315904) internal successors, (676), 514 states have internal predecessors, (676), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:18:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 704 transitions. [2022-07-21 17:18:25,315 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 704 transitions. Word has length 34 [2022-07-21 17:18:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:25,315 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 704 transitions. [2022-07-21 17:18:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 704 transitions. [2022-07-21 17:18:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 17:18:25,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:25,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:25,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-21 17:18:25,316 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1394937875, now seen corresponding path program 1 times [2022-07-21 17:18:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:25,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80653796] [2022-07-21 17:18:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:25,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:25,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:25,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80653796] [2022-07-21 17:18:25,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80653796] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:25,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:25,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:18:25,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600510639] [2022-07-21 17:18:25,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:25,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:25,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:25,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:25,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:25,365 INFO L87 Difference]: Start difference. First operand 533 states and 704 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:25,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:25,489 INFO L93 Difference]: Finished difference Result 557 states and 705 transitions. [2022-07-21 17:18:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:18:25,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-07-21 17:18:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:25,491 INFO L225 Difference]: With dead ends: 557 [2022-07-21 17:18:25,492 INFO L226 Difference]: Without dead ends: 557 [2022-07-21 17:18:25,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:18:25,492 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 523 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:25,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 592 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-07-21 17:18:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 532. [2022-07-21 17:18:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 459 states have (on average 1.4684095860566448) internal successors, (674), 513 states have internal predecessors, (674), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:18:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 702 transitions. [2022-07-21 17:18:25,499 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 702 transitions. Word has length 34 [2022-07-21 17:18:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:25,499 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 702 transitions. [2022-07-21 17:18:25,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 702 transitions. [2022-07-21 17:18:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:18:25,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:25,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:25,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-21 17:18:25,500 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:25,500 INFO L85 PathProgramCache]: Analyzing trace with hash -505498803, now seen corresponding path program 1 times [2022-07-21 17:18:25,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:25,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817513130] [2022-07-21 17:18:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:25,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:25,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:25,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:25,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817513130] [2022-07-21 17:18:25,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817513130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:25,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:25,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:18:25,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390466878] [2022-07-21 17:18:25,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:25,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:18:25,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:25,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:18:25,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:25,531 INFO L87 Difference]: Start difference. First operand 532 states and 702 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:25,685 INFO L93 Difference]: Finished difference Result 926 states and 1168 transitions. [2022-07-21 17:18:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:18:25,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-07-21 17:18:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:25,688 INFO L225 Difference]: With dead ends: 926 [2022-07-21 17:18:25,688 INFO L226 Difference]: Without dead ends: 926 [2022-07-21 17:18:25,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:25,689 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 594 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:25,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 575 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:25,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-07-21 17:18:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 529. [2022-07-21 17:18:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 459 states have (on average 1.4553376906318083) internal successors, (668), 510 states have internal predecessors, (668), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:18:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 696 transitions. [2022-07-21 17:18:25,699 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 696 transitions. Word has length 36 [2022-07-21 17:18:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:25,699 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 696 transitions. [2022-07-21 17:18:25,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 696 transitions. [2022-07-21 17:18:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:18:25,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:25,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:25,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-21 17:18:25,700 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:25,700 INFO L85 PathProgramCache]: Analyzing trace with hash -505498802, now seen corresponding path program 1 times [2022-07-21 17:18:25,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:25,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258795539] [2022-07-21 17:18:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:25,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:25,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:25,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:25,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258795539] [2022-07-21 17:18:25,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258795539] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:25,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:25,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:18:25,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753538657] [2022-07-21 17:18:25,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:25,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:25,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:25,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:25,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:25,769 INFO L87 Difference]: Start difference. First operand 529 states and 696 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:25,973 INFO L93 Difference]: Finished difference Result 765 states and 959 transitions. [2022-07-21 17:18:25,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:18:25,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-07-21 17:18:25,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:25,975 INFO L225 Difference]: With dead ends: 765 [2022-07-21 17:18:25,975 INFO L226 Difference]: Without dead ends: 765 [2022-07-21 17:18:25,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:18:25,976 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 708 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:25,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 700 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:18:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-07-21 17:18:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 528. [2022-07-21 17:18:25,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 459 states have (on average 1.4509803921568627) internal successors, (666), 509 states have internal predecessors, (666), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:18:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 694 transitions. [2022-07-21 17:18:25,984 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 694 transitions. Word has length 36 [2022-07-21 17:18:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:25,984 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 694 transitions. [2022-07-21 17:18:25,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 694 transitions. [2022-07-21 17:18:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:18:25,984 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:25,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:25,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-21 17:18:25,985 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash -505498641, now seen corresponding path program 1 times [2022-07-21 17:18:25,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:25,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008323455] [2022-07-21 17:18:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:25,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:26,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:26,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:26,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008323455] [2022-07-21 17:18:26,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008323455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:26,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:26,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:18:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377168013] [2022-07-21 17:18:26,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:26,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:18:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:18:26,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:26,054 INFO L87 Difference]: Start difference. First operand 528 states and 694 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:26,257 INFO L93 Difference]: Finished difference Result 683 states and 837 transitions. [2022-07-21 17:18:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:18:26,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-07-21 17:18:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:26,259 INFO L225 Difference]: With dead ends: 683 [2022-07-21 17:18:26,259 INFO L226 Difference]: Without dead ends: 683 [2022-07-21 17:18:26,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:26,259 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 611 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:26,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 450 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:18:26,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-07-21 17:18:26,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 528. [2022-07-21 17:18:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 459 states have (on average 1.446623093681917) internal successors, (664), 509 states have internal predecessors, (664), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 17:18:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 692 transitions. [2022-07-21 17:18:26,267 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 692 transitions. Word has length 36 [2022-07-21 17:18:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:26,267 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 692 transitions. [2022-07-21 17:18:26,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:26,267 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 692 transitions. [2022-07-21 17:18:26,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 17:18:26,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:26,268 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:26,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-21 17:18:26,268 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:26,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:26,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2111288145, now seen corresponding path program 1 times [2022-07-21 17:18:26,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:26,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165478802] [2022-07-21 17:18:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:26,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:26,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:26,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 17:18:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:26,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:26,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165478802] [2022-07-21 17:18:26,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165478802] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:26,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417930912] [2022-07-21 17:18:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:26,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:26,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:26,316 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) [2022-07-21 17:18:26,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:18:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:26,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:18:26,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:26,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:18:26,613 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:18:26,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-21 17:18:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:26,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417930912] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:18:26,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:18:26,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-21 17:18:26,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944621336] [2022-07-21 17:18:26,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:18:26,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:18:26,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:26,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:18:26,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:18:26,640 INFO L87 Difference]: Start difference. First operand 528 states and 692 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:18:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:27,224 INFO L93 Difference]: Finished difference Result 1659 states and 2022 transitions. [2022-07-21 17:18:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:18:27,225 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2022-07-21 17:18:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:27,239 INFO L225 Difference]: With dead ends: 1659 [2022-07-21 17:18:27,239 INFO L226 Difference]: Without dead ends: 1659 [2022-07-21 17:18:27,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:18:27,240 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 2182 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2184 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:27,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2184 Valid, 1561 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:18:27,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-07-21 17:18:27,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 628. [2022-07-21 17:18:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 556 states have (on average 1.3974820143884892) internal successors, (777), 602 states have internal predecessors, (777), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 15 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 17:18:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 817 transitions. [2022-07-21 17:18:27,251 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 817 transitions. Word has length 46 [2022-07-21 17:18:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:27,251 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 817 transitions. [2022-07-21 17:18:27,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:18:27,251 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 817 transitions. [2022-07-21 17:18:27,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 17:18:27,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:27,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:27,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:18:27,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-21 17:18:27,470 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1830908708, now seen corresponding path program 1 times [2022-07-21 17:18:27,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:27,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47018385] [2022-07-21 17:18:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:27,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:27,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:27,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 17:18:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:27,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:27,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47018385] [2022-07-21 17:18:27,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47018385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:27,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596416917] [2022-07-21 17:18:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:27,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:27,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:27,510 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) [2022-07-21 17:18:27,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:18:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:27,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:18:27,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:27,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:18:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:27,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596416917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:18:27,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:18:27,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-21 17:18:27,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223354317] [2022-07-21 17:18:27,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:18:27,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:18:27,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:18:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:18:27,670 INFO L87 Difference]: Start difference. First operand 628 states and 817 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 17:18:27,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:27,733 INFO L93 Difference]: Finished difference Result 1810 states and 2379 transitions. [2022-07-21 17:18:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:18:27,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2022-07-21 17:18:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:27,737 INFO L225 Difference]: With dead ends: 1810 [2022-07-21 17:18:27,738 INFO L226 Difference]: Without dead ends: 1810 [2022-07-21 17:18:27,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:18:27,738 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 859 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:27,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 1005 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:27,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-07-21 17:18:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1180. [2022-07-21 17:18:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1099 states have (on average 1.4222020018198362) internal successors, (1563), 1145 states have internal predecessors, (1563), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-21 17:18:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1621 transitions. [2022-07-21 17:18:27,757 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1621 transitions. Word has length 50 [2022-07-21 17:18:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:27,757 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 1621 transitions. [2022-07-21 17:18:27,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 17:18:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1621 transitions. [2022-07-21 17:18:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 17:18:27,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:27,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:27,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:18:27,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-21 17:18:27,975 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1129844130, now seen corresponding path program 1 times [2022-07-21 17:18:27,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:27,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548750293] [2022-07-21 17:18:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:27,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:28,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:28,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 17:18:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:28,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:28,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548750293] [2022-07-21 17:18:28,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548750293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:28,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:28,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:18:28,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839532588] [2022-07-21 17:18:28,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:28,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:28,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:28,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:28,053 INFO L87 Difference]: Start difference. First operand 1180 states and 1621 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:28,206 INFO L93 Difference]: Finished difference Result 1280 states and 1724 transitions. [2022-07-21 17:18:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:18:28,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-07-21 17:18:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:28,210 INFO L225 Difference]: With dead ends: 1280 [2022-07-21 17:18:28,210 INFO L226 Difference]: Without dead ends: 1280 [2022-07-21 17:18:28,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:18:28,211 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 502 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:28,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 429 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-07-21 17:18:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1177. [2022-07-21 17:18:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1099 states have (on average 1.4094631483166515) internal successors, (1549), 1142 states have internal predecessors, (1549), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-21 17:18:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1607 transitions. [2022-07-21 17:18:28,230 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1607 transitions. Word has length 50 [2022-07-21 17:18:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:28,230 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 1607 transitions. [2022-07-21 17:18:28,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1607 transitions. [2022-07-21 17:18:28,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:18:28,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:28,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:28,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-21 17:18:28,232 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash -642104005, now seen corresponding path program 1 times [2022-07-21 17:18:28,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:28,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225192336] [2022-07-21 17:18:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:28,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:28,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:28,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:28,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225192336] [2022-07-21 17:18:28,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225192336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:28,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036831870] [2022-07-21 17:18:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:28,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:28,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:28,258 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) [2022-07-21 17:18:28,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:18:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:28,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:18:28,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:28,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:18:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:28,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036831870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:18:28,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:18:28,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-21 17:18:28,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467714209] [2022-07-21 17:18:28,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:18:28,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:18:28,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:28,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:18:28,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:18:28,415 INFO L87 Difference]: Start difference. First operand 1177 states and 1607 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:18:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:28,460 INFO L93 Difference]: Finished difference Result 2251 states and 2962 transitions. [2022-07-21 17:18:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:18:28,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2022-07-21 17:18:28,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:28,466 INFO L225 Difference]: With dead ends: 2251 [2022-07-21 17:18:28,467 INFO L226 Difference]: Without dead ends: 2251 [2022-07-21 17:18:28,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:18:28,467 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 554 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:28,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 715 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2022-07-21 17:18:28,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1926. [2022-07-21 17:18:28,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1818 states have (on average 1.3778877887788779) internal successors, (2505), 1861 states have internal predecessors, (2505), 59 states have call successors, (59), 10 states have call predecessors, (59), 10 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-07-21 17:18:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2623 transitions. [2022-07-21 17:18:28,492 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2623 transitions. Word has length 51 [2022-07-21 17:18:28,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:28,492 INFO L495 AbstractCegarLoop]: Abstraction has 1926 states and 2623 transitions. [2022-07-21 17:18:28,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:18:28,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2623 transitions. [2022-07-21 17:18:28,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:18:28,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:28,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:28,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:18:28,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:28,707 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash -55297991, now seen corresponding path program 1 times [2022-07-21 17:18:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100882781] [2022-07-21 17:18:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:28,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:28,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:28,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100882781] [2022-07-21 17:18:28,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100882781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:28,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386316707] [2022-07-21 17:18:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:28,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:28,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:28,737 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) [2022-07-21 17:18:28,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:18:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:28,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:18:28,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:28,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:18:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:28,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386316707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:18:28,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:18:28,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-07-21 17:18:28,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059232359] [2022-07-21 17:18:28,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:18:28,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:18:28,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:28,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:18:28,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:18:28,888 INFO L87 Difference]: Start difference. First operand 1926 states and 2623 transitions. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:18:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:28,934 INFO L93 Difference]: Finished difference Result 6791 states and 9240 transitions. [2022-07-21 17:18:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:18:28,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2022-07-21 17:18:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:28,947 INFO L225 Difference]: With dead ends: 6791 [2022-07-21 17:18:28,948 INFO L226 Difference]: Without dead ends: 6791 [2022-07-21 17:18:28,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:18:28,948 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 566 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:28,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1086 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6791 states. [2022-07-21 17:18:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6791 to 4827. [2022-07-21 17:18:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4629 states have (on average 1.3687621516526247) internal successors, (6336), 4677 states have internal predecessors, (6336), 149 states have call successors, (149), 10 states have call predecessors, (149), 10 states have return successors, (149), 139 states have call predecessors, (149), 149 states have call successors, (149) [2022-07-21 17:18:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 6634 transitions. [2022-07-21 17:18:29,012 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 6634 transitions. Word has length 51 [2022-07-21 17:18:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:29,012 INFO L495 AbstractCegarLoop]: Abstraction has 4827 states and 6634 transitions. [2022-07-21 17:18:29,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:18:29,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 6634 transitions. [2022-07-21 17:18:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:18:29,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:29,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:29,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:18:29,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 17:18:29,227 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash -735356361, now seen corresponding path program 1 times [2022-07-21 17:18:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:29,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550543102] [2022-07-21 17:18:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:29,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:29,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:29,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:29,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550543102] [2022-07-21 17:18:29,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550543102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:29,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:29,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:18:29,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023788819] [2022-07-21 17:18:29,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:29,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:29,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:29,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:29,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:29,257 INFO L87 Difference]: Start difference. First operand 4827 states and 6634 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:29,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:29,277 INFO L93 Difference]: Finished difference Result 5546 states and 7718 transitions. [2022-07-21 17:18:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:29,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-07-21 17:18:29,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:29,286 INFO L225 Difference]: With dead ends: 5546 [2022-07-21 17:18:29,286 INFO L226 Difference]: Without dead ends: 5546 [2022-07-21 17:18:29,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:29,287 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 153 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:29,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 707 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2022-07-21 17:18:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4588. [2022-07-21 17:18:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 4404 states have (on average 1.3771571298819256) internal successors, (6065), 4452 states have internal predecessors, (6065), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2022-07-21 17:18:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 6337 transitions. [2022-07-21 17:18:29,367 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 6337 transitions. Word has length 51 [2022-07-21 17:18:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:29,367 INFO L495 AbstractCegarLoop]: Abstraction has 4588 states and 6337 transitions. [2022-07-21 17:18:29,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:29,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 6337 transitions. [2022-07-21 17:18:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:18:29,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:29,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:29,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-21 17:18:29,369 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:29,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1366525278, now seen corresponding path program 1 times [2022-07-21 17:18:29,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:29,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394041769] [2022-07-21 17:18:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:29,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:29,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:29,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:29,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394041769] [2022-07-21 17:18:29,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394041769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:29,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:29,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 17:18:29,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145614632] [2022-07-21 17:18:29,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:29,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:18:29,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:29,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:18:29,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:18:29,498 INFO L87 Difference]: Start difference. First operand 4588 states and 6337 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:29,760 INFO L93 Difference]: Finished difference Result 4636 states and 6368 transitions. [2022-07-21 17:18:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:18:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-07-21 17:18:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:29,774 INFO L225 Difference]: With dead ends: 4636 [2022-07-21 17:18:29,774 INFO L226 Difference]: Without dead ends: 4636 [2022-07-21 17:18:29,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:18:29,775 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 528 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:29,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 810 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:18:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2022-07-21 17:18:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 4590. [2022-07-21 17:18:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4590 states, 4406 states have (on average 1.377212891511575) internal successors, (6068), 4454 states have internal predecessors, (6068), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2022-07-21 17:18:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 6340 transitions. [2022-07-21 17:18:29,836 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 6340 transitions. Word has length 51 [2022-07-21 17:18:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:29,836 INFO L495 AbstractCegarLoop]: Abstraction has 4590 states and 6340 transitions. [2022-07-21 17:18:29,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 6340 transitions. [2022-07-21 17:18:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:18:29,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:29,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:29,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-21 17:18:29,837 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1366525340, now seen corresponding path program 1 times [2022-07-21 17:18:29,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:29,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568867854] [2022-07-21 17:18:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:29,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:29,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:29,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:29,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568867854] [2022-07-21 17:18:29,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568867854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:29,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:29,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:18:29,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607147740] [2022-07-21 17:18:29,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:29,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:29,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:29,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:29,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:29,900 INFO L87 Difference]: Start difference. First operand 4590 states and 6340 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:30,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:30,035 INFO L93 Difference]: Finished difference Result 4635 states and 6366 transitions. [2022-07-21 17:18:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:18:30,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-07-21 17:18:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:30,042 INFO L225 Difference]: With dead ends: 4635 [2022-07-21 17:18:30,042 INFO L226 Difference]: Without dead ends: 4635 [2022-07-21 17:18:30,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:18:30,042 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 286 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:30,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 455 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2022-07-21 17:18:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 4587. [2022-07-21 17:18:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4404 states have (on average 1.3767029972752043) internal successors, (6063), 4451 states have internal predecessors, (6063), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2022-07-21 17:18:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 6335 transitions. [2022-07-21 17:18:30,099 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 6335 transitions. Word has length 51 [2022-07-21 17:18:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:30,099 INFO L495 AbstractCegarLoop]: Abstraction has 4587 states and 6335 transitions. [2022-07-21 17:18:30,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:30,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 6335 transitions. [2022-07-21 17:18:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:18:30,100 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:30,101 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:30,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-21 17:18:30,101 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1854248023, now seen corresponding path program 1 times [2022-07-21 17:18:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:30,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176409924] [2022-07-21 17:18:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:30,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:30,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:30,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:30,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176409924] [2022-07-21 17:18:30,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176409924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:30,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430736979] [2022-07-21 17:18:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:30,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:30,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:30,145 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) [2022-07-21 17:18:30,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:18:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:30,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:18:30,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:30,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:18:30,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 17:18:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:18:30,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:18:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:18:30,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430736979] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:18:30,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:18:30,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2022-07-21 17:18:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060591653] [2022-07-21 17:18:30,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:18:30,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:18:30,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:18:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:18:30,571 INFO L87 Difference]: Start difference. First operand 4587 states and 6335 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:18:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:31,151 INFO L93 Difference]: Finished difference Result 6000 states and 8330 transitions. [2022-07-21 17:18:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:18:31,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2022-07-21 17:18:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:31,159 INFO L225 Difference]: With dead ends: 6000 [2022-07-21 17:18:31,159 INFO L226 Difference]: Without dead ends: 5993 [2022-07-21 17:18:31,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:18:31,160 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 643 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:31,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 2079 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:18:31,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2022-07-21 17:18:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 4632. [2022-07-21 17:18:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4449 states have (on average 1.372443245673185) internal successors, (6106), 4496 states have internal predecessors, (6106), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2022-07-21 17:18:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 6378 transitions. [2022-07-21 17:18:31,222 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 6378 transitions. Word has length 52 [2022-07-21 17:18:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:31,224 INFO L495 AbstractCegarLoop]: Abstraction has 4632 states and 6378 transitions. [2022-07-21 17:18:31,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:18:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 6378 transitions. [2022-07-21 17:18:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:18:31,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:31,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:31,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 17:18:31,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:31,439 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:31,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1882183379, now seen corresponding path program 1 times [2022-07-21 17:18:31,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:31,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713280610] [2022-07-21 17:18:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:31,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:31,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 17:18:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:31,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 17:18:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:31,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:31,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713280610] [2022-07-21 17:18:31,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713280610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:31,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470722244] [2022-07-21 17:18:31,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:31,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:31,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:31,508 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) [2022-07-21 17:18:31,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:18:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:31,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 17:18:31,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:31,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:18:31,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 17:18:31,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:18:31,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 17:18:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:31,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:18:31,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470722244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:31,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:18:31,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-07-21 17:18:31,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180634098] [2022-07-21 17:18:31,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:31,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:18:31,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:31,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:18:31,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:18:31,724 INFO L87 Difference]: Start difference. First operand 4632 states and 6378 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:31,960 INFO L93 Difference]: Finished difference Result 3697 states and 5153 transitions. [2022-07-21 17:18:31,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:18:31,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-07-21 17:18:31,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:31,965 INFO L225 Difference]: With dead ends: 3697 [2022-07-21 17:18:31,965 INFO L226 Difference]: Without dead ends: 3697 [2022-07-21 17:18:31,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:18:31,966 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 298 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:31,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1444 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3697 states. [2022-07-21 17:18:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3697 to 2997. [2022-07-21 17:18:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2879 states have (on average 1.408475164987843) internal successors, (4055), 2916 states have internal predecessors, (4055), 76 states have call successors, (76), 4 states have call predecessors, (76), 4 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-07-21 17:18:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 4207 transitions. [2022-07-21 17:18:32,013 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 4207 transitions. Word has length 54 [2022-07-21 17:18:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:32,013 INFO L495 AbstractCegarLoop]: Abstraction has 2997 states and 4207 transitions. [2022-07-21 17:18:32,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 4207 transitions. [2022-07-21 17:18:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:18:32,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:32,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:32,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 17:18:32,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:32,231 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:32,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1840199306, now seen corresponding path program 1 times [2022-07-21 17:18:32,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:32,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169482103] [2022-07-21 17:18:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:32,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:32,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:32,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:32,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169482103] [2022-07-21 17:18:32,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169482103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:32,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:32,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 17:18:32,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571971846] [2022-07-21 17:18:32,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:32,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:18:32,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:32,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:18:32,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:18:32,380 INFO L87 Difference]: Start difference. First operand 2997 states and 4207 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:32,968 INFO L93 Difference]: Finished difference Result 7440 states and 10662 transitions. [2022-07-21 17:18:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:18:32,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-07-21 17:18:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:32,980 INFO L225 Difference]: With dead ends: 7440 [2022-07-21 17:18:32,981 INFO L226 Difference]: Without dead ends: 7440 [2022-07-21 17:18:32,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:18:32,981 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 1418 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:32,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1420 Valid, 1260 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:18:32,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7440 states. [2022-07-21 17:18:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7440 to 4294. [2022-07-21 17:18:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4121 states have (on average 1.4098519776753216) internal successors, (5810), 4182 states have internal predecessors, (5810), 129 states have call successors, (129), 7 states have call predecessors, (129), 7 states have return successors, (129), 104 states have call predecessors, (129), 129 states have call successors, (129) [2022-07-21 17:18:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 6068 transitions. [2022-07-21 17:18:33,035 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 6068 transitions. Word has length 54 [2022-07-21 17:18:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:33,035 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 6068 transitions. [2022-07-21 17:18:33,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 6068 transitions. [2022-07-21 17:18:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:18:33,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:33,036 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:33,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-21 17:18:33,036 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1840199305, now seen corresponding path program 1 times [2022-07-21 17:18:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:33,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12921706] [2022-07-21 17:18:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:33,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:33,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:33,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12921706] [2022-07-21 17:18:33,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12921706] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:33,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:33,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 17:18:33,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122579095] [2022-07-21 17:18:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:33,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:18:33,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:33,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:18:33,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:18:33,323 INFO L87 Difference]: Start difference. First operand 4294 states and 6068 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:33,998 INFO L93 Difference]: Finished difference Result 7146 states and 10222 transitions. [2022-07-21 17:18:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:18:33,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-07-21 17:18:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:34,008 INFO L225 Difference]: With dead ends: 7146 [2022-07-21 17:18:34,008 INFO L226 Difference]: Without dead ends: 7146 [2022-07-21 17:18:34,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:18:34,009 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1078 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:34,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 1113 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:18:34,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2022-07-21 17:18:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 4539. [2022-07-21 17:18:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4352 states have (on average 1.4092371323529411) internal successors, (6133), 4415 states have internal predecessors, (6133), 142 states have call successors, (142), 8 states have call predecessors, (142), 8 states have return successors, (142), 115 states have call predecessors, (142), 142 states have call successors, (142) [2022-07-21 17:18:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 6417 transitions. [2022-07-21 17:18:34,060 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 6417 transitions. Word has length 54 [2022-07-21 17:18:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:34,060 INFO L495 AbstractCegarLoop]: Abstraction has 4539 states and 6417 transitions. [2022-07-21 17:18:34,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 6417 transitions. [2022-07-21 17:18:34,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:18:34,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:34,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:34,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-21 17:18:34,061 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:34,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:34,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1838352264, now seen corresponding path program 1 times [2022-07-21 17:18:34,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:34,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349875149] [2022-07-21 17:18:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:34,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:34,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:34,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:34,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349875149] [2022-07-21 17:18:34,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349875149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:34,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:34,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 17:18:34,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841268166] [2022-07-21 17:18:34,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:34,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:18:34,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:34,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:18:34,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:18:34,463 INFO L87 Difference]: Start difference. First operand 4539 states and 6417 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:34,798 INFO L93 Difference]: Finished difference Result 4581 states and 6459 transitions. [2022-07-21 17:18:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:18:34,798 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-07-21 17:18:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:34,803 INFO L225 Difference]: With dead ends: 4581 [2022-07-21 17:18:34,803 INFO L226 Difference]: Without dead ends: 4581 [2022-07-21 17:18:34,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:18:34,804 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 122 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:34,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 751 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:34,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2022-07-21 17:18:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 4577. [2022-07-21 17:18:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4390 states have (on average 1.4056947608200456) internal successors, (6171), 4453 states have internal predecessors, (6171), 142 states have call successors, (142), 8 states have call predecessors, (142), 8 states have return successors, (142), 115 states have call predecessors, (142), 142 states have call successors, (142) [2022-07-21 17:18:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 6455 transitions. [2022-07-21 17:18:34,842 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 6455 transitions. Word has length 54 [2022-07-21 17:18:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:34,842 INFO L495 AbstractCegarLoop]: Abstraction has 4577 states and 6455 transitions. [2022-07-21 17:18:34,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 6455 transitions. [2022-07-21 17:18:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 17:18:34,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:34,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:34,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-21 17:18:34,844 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:34,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1320627297, now seen corresponding path program 1 times [2022-07-21 17:18:34,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:34,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920927700] [2022-07-21 17:18:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:34,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:35,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:35,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:35,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920927700] [2022-07-21 17:18:35,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920927700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:35,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:35,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 17:18:35,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036933285] [2022-07-21 17:18:35,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:35,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:18:35,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:35,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:18:35,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:18:35,027 INFO L87 Difference]: Start difference. First operand 4577 states and 6455 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:35,446 INFO L93 Difference]: Finished difference Result 7643 states and 10898 transitions. [2022-07-21 17:18:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:18:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-07-21 17:18:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:35,455 INFO L225 Difference]: With dead ends: 7643 [2022-07-21 17:18:35,455 INFO L226 Difference]: Without dead ends: 7643 [2022-07-21 17:18:35,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:18:35,455 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1075 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:35,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 1118 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:18:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7643 states. [2022-07-21 17:18:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7643 to 5814. [2022-07-21 17:18:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5814 states, 5517 states have (on average 1.3839042958129417) internal successors, (7635), 5628 states have internal predecessors, (7635), 246 states have call successors, (246), 14 states have call predecessors, (246), 14 states have return successors, (246), 171 states have call predecessors, (246), 246 states have call successors, (246) [2022-07-21 17:18:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5814 states to 5814 states and 8127 transitions. [2022-07-21 17:18:35,515 INFO L78 Accepts]: Start accepts. Automaton has 5814 states and 8127 transitions. Word has length 55 [2022-07-21 17:18:35,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:35,516 INFO L495 AbstractCegarLoop]: Abstraction has 5814 states and 8127 transitions. [2022-07-21 17:18:35,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:35,516 INFO L276 IsEmpty]: Start isEmpty. Operand 5814 states and 8127 transitions. [2022-07-21 17:18:35,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 17:18:35,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:35,517 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:35,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-21 17:18:35,517 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:35,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1320627296, now seen corresponding path program 1 times [2022-07-21 17:18:35,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:35,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749596420] [2022-07-21 17:18:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:35,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:35,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:35,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:35,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749596420] [2022-07-21 17:18:35,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749596420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:35,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:35,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 17:18:35,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696162136] [2022-07-21 17:18:35,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:35,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:18:35,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:18:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:18:35,736 INFO L87 Difference]: Start difference. First operand 5814 states and 8127 transitions. Second operand has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:36,135 INFO L93 Difference]: Finished difference Result 7519 states and 10686 transitions. [2022-07-21 17:18:36,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:18:36,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-07-21 17:18:36,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:36,161 INFO L225 Difference]: With dead ends: 7519 [2022-07-21 17:18:36,161 INFO L226 Difference]: Without dead ends: 7519 [2022-07-21 17:18:36,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-07-21 17:18:36,162 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 992 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:36,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 835 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:18:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2022-07-21 17:18:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 6287. [2022-07-21 17:18:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6287 states, 5962 states have (on average 1.3849379402884938) internal successors, (8257), 6077 states have internal predecessors, (8257), 272 states have call successors, (272), 16 states have call predecessors, (272), 16 states have return successors, (272), 193 states have call predecessors, (272), 272 states have call successors, (272) [2022-07-21 17:18:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6287 states to 6287 states and 8801 transitions. [2022-07-21 17:18:36,232 INFO L78 Accepts]: Start accepts. Automaton has 6287 states and 8801 transitions. Word has length 55 [2022-07-21 17:18:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:36,232 INFO L495 AbstractCegarLoop]: Abstraction has 6287 states and 8801 transitions. [2022-07-21 17:18:36,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 6287 states and 8801 transitions. [2022-07-21 17:18:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 17:18:36,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:36,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:36,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-21 17:18:36,234 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:36,234 INFO L85 PathProgramCache]: Analyzing trace with hash 453056025, now seen corresponding path program 1 times [2022-07-21 17:18:36,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:36,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926110325] [2022-07-21 17:18:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:36,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:36,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:36,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 17:18:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:18:36,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:36,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926110325] [2022-07-21 17:18:36,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926110325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:36,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:36,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:18:36,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9826016] [2022-07-21 17:18:36,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:36,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:18:36,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:36,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:18:36,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:36,286 INFO L87 Difference]: Start difference. First operand 6287 states and 8801 transitions. Second operand has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:18:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:36,319 INFO L93 Difference]: Finished difference Result 7344 states and 10187 transitions. [2022-07-21 17:18:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:18:36,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2022-07-21 17:18:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:36,328 INFO L225 Difference]: With dead ends: 7344 [2022-07-21 17:18:36,328 INFO L226 Difference]: Without dead ends: 7344 [2022-07-21 17:18:36,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:18:36,329 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 270 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:36,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 438 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7344 states. [2022-07-21 17:18:36,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7344 to 6286. [2022-07-21 17:18:36,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6286 states, 5962 states have (on average 1.3768869506876886) internal successors, (8209), 6076 states have internal predecessors, (8209), 272 states have call successors, (272), 16 states have call predecessors, (272), 16 states have return successors, (272), 193 states have call predecessors, (272), 272 states have call successors, (272) [2022-07-21 17:18:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6286 states to 6286 states and 8753 transitions. [2022-07-21 17:18:36,429 INFO L78 Accepts]: Start accepts. Automaton has 6286 states and 8753 transitions. Word has length 56 [2022-07-21 17:18:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:36,430 INFO L495 AbstractCegarLoop]: Abstraction has 6286 states and 8753 transitions. [2022-07-21 17:18:36,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:18:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 6286 states and 8753 transitions. [2022-07-21 17:18:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 17:18:36,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:36,433 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:36,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-21 17:18:36,433 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:36,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1775377953, now seen corresponding path program 1 times [2022-07-21 17:18:36,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:36,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721649194] [2022-07-21 17:18:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:36,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:36,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-21 17:18:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:36,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:36,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721649194] [2022-07-21 17:18:36,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721649194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:36,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436219687] [2022-07-21 17:18:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:36,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:36,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:36,697 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) [2022-07-21 17:18:36,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 17:18:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:36,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 17:18:36,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:36,842 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:18:36,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 17:18:36,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:18:36,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:18:36,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:18:37,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 17:18:37,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:18:37,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 17:18:37,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:18:37,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:18:37,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 17:18:37,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 17:18:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:37,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:18:37,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436219687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:37,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:18:37,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 24 [2022-07-21 17:18:37,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662003541] [2022-07-21 17:18:37,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:37,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:18:37,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:37,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:18:37,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-07-21 17:18:37,147 INFO L87 Difference]: Start difference. First operand 6286 states and 8753 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:37,648 INFO L93 Difference]: Finished difference Result 9036 states and 12596 transitions. [2022-07-21 17:18:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:18:37,649 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-07-21 17:18:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:37,659 INFO L225 Difference]: With dead ends: 9036 [2022-07-21 17:18:37,659 INFO L226 Difference]: Without dead ends: 9036 [2022-07-21 17:18:37,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 17:18:37,660 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 695 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:37,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 1111 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:18:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2022-07-21 17:18:37,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 6329. [2022-07-21 17:18:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 6006 states have (on average 1.3734598734598735) internal successors, (8249), 6119 states have internal predecessors, (8249), 271 states have call successors, (271), 16 states have call predecessors, (271), 16 states have return successors, (271), 193 states have call predecessors, (271), 271 states have call successors, (271) [2022-07-21 17:18:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 8791 transitions. [2022-07-21 17:18:37,730 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 8791 transitions. Word has length 56 [2022-07-21 17:18:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:37,731 INFO L495 AbstractCegarLoop]: Abstraction has 6329 states and 8791 transitions. [2022-07-21 17:18:37,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 8791 transitions. [2022-07-21 17:18:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 17:18:37,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:37,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:37,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:18:37,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:37,947 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash 840572766, now seen corresponding path program 1 times [2022-07-21 17:18:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:37,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318261367] [2022-07-21 17:18:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:37,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:38,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:38,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:38,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318261367] [2022-07-21 17:18:38,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318261367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:38,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:38,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-21 17:18:38,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829382744] [2022-07-21 17:18:38,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:38,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 17:18:38,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 17:18:38,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:18:38,329 INFO L87 Difference]: Start difference. First operand 6329 states and 8791 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:39,561 INFO L93 Difference]: Finished difference Result 9541 states and 13400 transitions. [2022-07-21 17:18:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:18:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-07-21 17:18:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:39,573 INFO L225 Difference]: With dead ends: 9541 [2022-07-21 17:18:39,573 INFO L226 Difference]: Without dead ends: 9541 [2022-07-21 17:18:39,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 17:18:39,575 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 1642 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:39,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 1534 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:18:39,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2022-07-21 17:18:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 7647. [2022-07-21 17:18:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7647 states, 7214 states have (on average 1.3635985583587469) internal successors, (9837), 7375 states have internal predecessors, (9837), 375 states have call successors, (375), 22 states have call predecessors, (375), 22 states have return successors, (375), 249 states have call predecessors, (375), 375 states have call successors, (375) [2022-07-21 17:18:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7647 states to 7647 states and 10587 transitions. [2022-07-21 17:18:39,653 INFO L78 Accepts]: Start accepts. Automaton has 7647 states and 10587 transitions. Word has length 56 [2022-07-21 17:18:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:39,653 INFO L495 AbstractCegarLoop]: Abstraction has 7647 states and 10587 transitions. [2022-07-21 17:18:39,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7647 states and 10587 transitions. [2022-07-21 17:18:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 17:18:39,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:39,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:39,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-21 17:18:39,654 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:39,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash 840572767, now seen corresponding path program 1 times [2022-07-21 17:18:39,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:39,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069651108] [2022-07-21 17:18:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:39,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:40,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:40,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:40,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069651108] [2022-07-21 17:18:40,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069651108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:40,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:40,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 17:18:40,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133661423] [2022-07-21 17:18:40,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:40,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:18:40,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:40,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:18:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:18:40,046 INFO L87 Difference]: Start difference. First operand 7647 states and 10587 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:40,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:40,938 INFO L93 Difference]: Finished difference Result 9352 states and 13122 transitions. [2022-07-21 17:18:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 17:18:40,939 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-07-21 17:18:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:40,948 INFO L225 Difference]: With dead ends: 9352 [2022-07-21 17:18:40,948 INFO L226 Difference]: Without dead ends: 9352 [2022-07-21 17:18:40,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-07-21 17:18:40,949 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1541 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:40,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1543 Valid, 1068 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:18:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9352 states. [2022-07-21 17:18:41,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9352 to 6622. [2022-07-21 17:18:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6622 states, 6276 states have (on average 1.369821542383684) internal successors, (8597), 6399 states have internal predecessors, (8597), 293 states have call successors, (293), 17 states have call predecessors, (293), 17 states have return successors, (293), 205 states have call predecessors, (293), 293 states have call successors, (293) [2022-07-21 17:18:41,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6622 states to 6622 states and 9183 transitions. [2022-07-21 17:18:41,032 INFO L78 Accepts]: Start accepts. Automaton has 6622 states and 9183 transitions. Word has length 56 [2022-07-21 17:18:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:41,032 INFO L495 AbstractCegarLoop]: Abstraction has 6622 states and 9183 transitions. [2022-07-21 17:18:41,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6622 states and 9183 transitions. [2022-07-21 17:18:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 17:18:41,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:41,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:41,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-21 17:18:41,034 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:41,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:41,034 INFO L85 PathProgramCache]: Analyzing trace with hash 110361472, now seen corresponding path program 1 times [2022-07-21 17:18:41,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:41,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712634361] [2022-07-21 17:18:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:41,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:41,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:41,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 17:18:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:18:41,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:41,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712634361] [2022-07-21 17:18:41,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712634361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:41,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736793808] [2022-07-21 17:18:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:41,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:41,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:41,307 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) [2022-07-21 17:18:41,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 17:18:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:41,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 17:18:41,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:41,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:18:41,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:18:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:18:41,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-21 17:18:41,818 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-07-21 17:18:41,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-07-21 17:18:41,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-21 17:18:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:41,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:18:41,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736793808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:41,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:18:41,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2022-07-21 17:18:41,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975401616] [2022-07-21 17:18:41,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:18:41,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:18:41,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:18:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:18:41,955 INFO L87 Difference]: Start difference. First operand 6622 states and 9183 transitions. Second operand has 25 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:18:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:43,103 INFO L93 Difference]: Finished difference Result 15826 states and 22398 transitions. [2022-07-21 17:18:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 17:18:43,103 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-07-21 17:18:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:43,124 INFO L225 Difference]: With dead ends: 15826 [2022-07-21 17:18:43,124 INFO L226 Difference]: Without dead ends: 15826 [2022-07-21 17:18:43,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=622, Invalid=2240, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 17:18:43,130 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 3565 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3566 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:43,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3566 Valid, 1891 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:18:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15826 states. [2022-07-21 17:18:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15826 to 7874. [2022-07-21 17:18:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7874 states, 7441 states have (on average 1.363526407740895) internal successors, (10146), 7578 states have internal predecessors, (10146), 375 states have call successors, (375), 22 states have call predecessors, (375), 22 states have return successors, (375), 273 states have call predecessors, (375), 375 states have call successors, (375) [2022-07-21 17:18:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7874 states to 7874 states and 10896 transitions. [2022-07-21 17:18:43,245 INFO L78 Accepts]: Start accepts. Automaton has 7874 states and 10896 transitions. Word has length 57 [2022-07-21 17:18:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:43,245 INFO L495 AbstractCegarLoop]: Abstraction has 7874 states and 10896 transitions. [2022-07-21 17:18:43,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:18:43,245 INFO L276 IsEmpty]: Start isEmpty. Operand 7874 states and 10896 transitions. [2022-07-21 17:18:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 17:18:43,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:43,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:43,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 17:18:43,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-21 17:18:43,459 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:43,460 INFO L85 PathProgramCache]: Analyzing trace with hash 110361473, now seen corresponding path program 1 times [2022-07-21 17:18:43,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:43,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357161336] [2022-07-21 17:18:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:43,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:43,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:43,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 17:18:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:18:44,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:44,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357161336] [2022-07-21 17:18:44,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357161336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:44,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932071017] [2022-07-21 17:18:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:44,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:44,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:44,018 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) [2022-07-21 17:18:44,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 17:18:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-21 17:18:44,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:44,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:18:44,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:18:44,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:18:44,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:18:44,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:18:44,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 17:18:44,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:18:44,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2022-07-21 17:18:44,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:18:44,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:18:44,765 INFO L356 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-07-21 17:18:44,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-21 17:18:44,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 17:18:44,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-21 17:18:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:44,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:18:45,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932071017] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:45,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:18:45,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 31 [2022-07-21 17:18:45,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111858595] [2022-07-21 17:18:45,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:18:45,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 17:18:45,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:45,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 17:18:45,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 17:18:45,057 INFO L87 Difference]: Start difference. First operand 7874 states and 10896 transitions. Second operand has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:18:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:46,683 INFO L93 Difference]: Finished difference Result 9715 states and 13603 transitions. [2022-07-21 17:18:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:18:46,684 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-07-21 17:18:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:46,695 INFO L225 Difference]: With dead ends: 9715 [2022-07-21 17:18:46,695 INFO L226 Difference]: Without dead ends: 9715 [2022-07-21 17:18:46,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=479, Invalid=2491, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 17:18:46,696 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 2916 mSDsluCounter, 1966 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2917 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:46,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2917 Valid, 2100 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 17:18:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9715 states. [2022-07-21 17:18:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9715 to 7874. [2022-07-21 17:18:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7874 states, 7441 states have (on average 1.3601666442682434) internal successors, (10121), 7578 states have internal predecessors, (10121), 375 states have call successors, (375), 22 states have call predecessors, (375), 22 states have return successors, (375), 273 states have call predecessors, (375), 375 states have call successors, (375) [2022-07-21 17:18:46,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7874 states to 7874 states and 10871 transitions. [2022-07-21 17:18:46,779 INFO L78 Accepts]: Start accepts. Automaton has 7874 states and 10871 transitions. Word has length 57 [2022-07-21 17:18:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:46,780 INFO L495 AbstractCegarLoop]: Abstraction has 7874 states and 10871 transitions. [2022-07-21 17:18:46,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:18:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 7874 states and 10871 transitions. [2022-07-21 17:18:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 17:18:46,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:46,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:46,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:18:46,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:47,000 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash 287950749, now seen corresponding path program 1 times [2022-07-21 17:18:47,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:47,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879978394] [2022-07-21 17:18:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:47,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:47,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:47,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879978394] [2022-07-21 17:18:47,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879978394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260900867] [2022-07-21 17:18:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:47,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:47,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:47,030 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:18:47,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 17:18:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:18:47,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:47,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:18:47,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260900867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:47,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:18:47,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-07-21 17:18:47,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587945435] [2022-07-21 17:18:47,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:47,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:47,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:47,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:47,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:47,188 INFO L87 Difference]: Start difference. First operand 7874 states and 10871 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:47,216 INFO L93 Difference]: Finished difference Result 9093 states and 12467 transitions. [2022-07-21 17:18:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:47,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-07-21 17:18:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:47,226 INFO L225 Difference]: With dead ends: 9093 [2022-07-21 17:18:47,226 INFO L226 Difference]: Without dead ends: 9093 [2022-07-21 17:18:47,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:47,228 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 241 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:47,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 362 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9093 states. [2022-07-21 17:18:47,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9093 to 8618. [2022-07-21 17:18:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8618 states, 8159 states have (on average 1.3517587939698492) internal successors, (11029), 8296 states have internal predecessors, (11029), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 299 states have call predecessors, (401), 401 states have call successors, (401) [2022-07-21 17:18:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8618 states to 8618 states and 11831 transitions. [2022-07-21 17:18:47,360 INFO L78 Accepts]: Start accepts. Automaton has 8618 states and 11831 transitions. Word has length 57 [2022-07-21 17:18:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:47,360 INFO L495 AbstractCegarLoop]: Abstraction has 8618 states and 11831 transitions. [2022-07-21 17:18:47,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:47,360 INFO L276 IsEmpty]: Start isEmpty. Operand 8618 states and 11831 transitions. [2022-07-21 17:18:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 17:18:47,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:47,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:47,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:18:47,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-21 17:18:47,561 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:47,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:47,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1083931757, now seen corresponding path program 1 times [2022-07-21 17:18:47,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:47,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299465255] [2022-07-21 17:18:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:47,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:47,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:47,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 17:18:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:47,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:47,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299465255] [2022-07-21 17:18:47,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299465255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:47,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:47,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-21 17:18:47,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23224625] [2022-07-21 17:18:47,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:47,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:18:47,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:47,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:18:47,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:18:47,979 INFO L87 Difference]: Start difference. First operand 8618 states and 11831 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:49,723 INFO L93 Difference]: Finished difference Result 15119 states and 21216 transitions. [2022-07-21 17:18:49,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:18:49,731 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-07-21 17:18:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:49,749 INFO L225 Difference]: With dead ends: 15119 [2022-07-21 17:18:49,749 INFO L226 Difference]: Without dead ends: 15105 [2022-07-21 17:18:49,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 17:18:49,750 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1901 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:49,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1901 Valid, 2391 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:18:49,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15105 states. [2022-07-21 17:18:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15105 to 8618. [2022-07-21 17:18:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8618 states, 8159 states have (on average 1.3478367446991053) internal successors, (10997), 8296 states have internal predecessors, (10997), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 299 states have call predecessors, (401), 401 states have call successors, (401) [2022-07-21 17:18:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8618 states to 8618 states and 11799 transitions. [2022-07-21 17:18:49,857 INFO L78 Accepts]: Start accepts. Automaton has 8618 states and 11799 transitions. Word has length 58 [2022-07-21 17:18:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:49,857 INFO L495 AbstractCegarLoop]: Abstraction has 8618 states and 11799 transitions. [2022-07-21 17:18:49,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:49,858 INFO L276 IsEmpty]: Start isEmpty. Operand 8618 states and 11799 transitions. [2022-07-21 17:18:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:18:49,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:49,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:49,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-21 17:18:49,859 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:49,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:49,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1844221281, now seen corresponding path program 1 times [2022-07-21 17:18:49,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:49,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118370214] [2022-07-21 17:18:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:49,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:50,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:50,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:50,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118370214] [2022-07-21 17:18:50,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118370214] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:50,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:50,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-21 17:18:50,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399795942] [2022-07-21 17:18:50,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:50,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:18:50,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:18:50,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:18:50,213 INFO L87 Difference]: Start difference. First operand 8618 states and 11799 transitions. Second operand has 16 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:51,109 INFO L93 Difference]: Finished difference Result 9937 states and 13792 transitions. [2022-07-21 17:18:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:18:51,109 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-07-21 17:18:51,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:51,120 INFO L225 Difference]: With dead ends: 9937 [2022-07-21 17:18:51,121 INFO L226 Difference]: Without dead ends: 9937 [2022-07-21 17:18:51,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2022-07-21 17:18:51,121 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1737 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:51,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1739 Valid, 1179 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:18:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9937 states. [2022-07-21 17:18:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9937 to 8905. [2022-07-21 17:18:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8905 states, 8432 states have (on average 1.3478415559772297) internal successors, (11365), 8571 states have internal predecessors, (11365), 414 states have call successors, (414), 23 states have call predecessors, (414), 23 states have return successors, (414), 310 states have call predecessors, (414), 414 states have call successors, (414) [2022-07-21 17:18:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8905 states to 8905 states and 12193 transitions. [2022-07-21 17:18:51,222 INFO L78 Accepts]: Start accepts. Automaton has 8905 states and 12193 transitions. Word has length 59 [2022-07-21 17:18:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:51,223 INFO L495 AbstractCegarLoop]: Abstraction has 8905 states and 12193 transitions. [2022-07-21 17:18:51,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 8905 states and 12193 transitions. [2022-07-21 17:18:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:18:51,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:51,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:51,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-21 17:18:51,224 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:51,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1034874655, now seen corresponding path program 1 times [2022-07-21 17:18:51,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:51,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341333960] [2022-07-21 17:18:51,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:51,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:51,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:51,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:51,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341333960] [2022-07-21 17:18:51,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341333960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:51,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:51,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 17:18:51,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385586339] [2022-07-21 17:18:51,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:51,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:18:51,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:51,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:18:51,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:18:51,466 INFO L87 Difference]: Start difference. First operand 8905 states and 12193 transitions. Second operand has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:51,826 INFO L93 Difference]: Finished difference Result 10964 states and 15193 transitions. [2022-07-21 17:18:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:18:51,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-07-21 17:18:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:51,847 INFO L225 Difference]: With dead ends: 10964 [2022-07-21 17:18:51,848 INFO L226 Difference]: Without dead ends: 10964 [2022-07-21 17:18:51,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:18:51,848 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 979 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:51,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 874 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:18:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2022-07-21 17:18:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 9533. [2022-07-21 17:18:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9533 states, 9033 states have (on average 1.356138602900476) internal successors, (12250), 9176 states have internal predecessors, (12250), 439 states have call successors, (439), 25 states have call predecessors, (439), 25 states have return successors, (439), 331 states have call predecessors, (439), 439 states have call successors, (439) [2022-07-21 17:18:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9533 states to 9533 states and 13128 transitions. [2022-07-21 17:18:51,940 INFO L78 Accepts]: Start accepts. Automaton has 9533 states and 13128 transitions. Word has length 59 [2022-07-21 17:18:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:51,940 INFO L495 AbstractCegarLoop]: Abstraction has 9533 states and 13128 transitions. [2022-07-21 17:18:51,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 9533 states and 13128 transitions. [2022-07-21 17:18:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 17:18:51,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:51,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:51,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-21 17:18:51,941 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:51,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:51,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2010992519, now seen corresponding path program 1 times [2022-07-21 17:18:51,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:51,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388820065] [2022-07-21 17:18:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:51,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:52,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:52,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 17:18:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:18:52,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:52,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388820065] [2022-07-21 17:18:52,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388820065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:52,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:52,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:18:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841639175] [2022-07-21 17:18:52,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:52,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:18:52,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:18:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:18:52,025 INFO L87 Difference]: Start difference. First operand 9533 states and 13128 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:52,228 INFO L93 Difference]: Finished difference Result 9615 states and 13160 transitions. [2022-07-21 17:18:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:18:52,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-07-21 17:18:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:52,241 INFO L225 Difference]: With dead ends: 9615 [2022-07-21 17:18:52,241 INFO L226 Difference]: Without dead ends: 9615 [2022-07-21 17:18:52,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:18:52,242 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 344 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:52,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 533 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:52,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2022-07-21 17:18:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 9531. [2022-07-21 17:18:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9531 states, 9033 states have (on average 1.3468393667663014) internal successors, (12166), 9174 states have internal predecessors, (12166), 439 states have call successors, (439), 25 states have call predecessors, (439), 25 states have return successors, (439), 331 states have call predecessors, (439), 439 states have call successors, (439) [2022-07-21 17:18:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9531 states to 9531 states and 13044 transitions. [2022-07-21 17:18:52,356 INFO L78 Accepts]: Start accepts. Automaton has 9531 states and 13044 transitions. Word has length 60 [2022-07-21 17:18:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:52,357 INFO L495 AbstractCegarLoop]: Abstraction has 9531 states and 13044 transitions. [2022-07-21 17:18:52,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 9531 states and 13044 transitions. [2022-07-21 17:18:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 17:18:52,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:52,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:52,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-21 17:18:52,358 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1895327591, now seen corresponding path program 1 times [2022-07-21 17:18:52,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:52,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24281326] [2022-07-21 17:18:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:52,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:52,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:52,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 17:18:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:18:52,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:52,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24281326] [2022-07-21 17:18:52,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24281326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:52,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:52,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:18:52,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327189885] [2022-07-21 17:18:52,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:52,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:18:52,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:18:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:18:52,388 INFO L87 Difference]: Start difference. First operand 9531 states and 13044 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:52,410 INFO L93 Difference]: Finished difference Result 9531 states and 12990 transitions. [2022-07-21 17:18:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:18:52,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-07-21 17:18:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:52,422 INFO L225 Difference]: With dead ends: 9531 [2022-07-21 17:18:52,423 INFO L226 Difference]: Without dead ends: 9531 [2022-07-21 17:18:52,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:18:52,423 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 0 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:52,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 308 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9531 states. [2022-07-21 17:18:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9531 to 9531. [2022-07-21 17:18:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9531 states, 9033 states have (on average 1.3408612863943319) internal successors, (12112), 9174 states have internal predecessors, (12112), 439 states have call successors, (439), 25 states have call predecessors, (439), 25 states have return successors, (439), 331 states have call predecessors, (439), 439 states have call successors, (439) [2022-07-21 17:18:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9531 states to 9531 states and 12990 transitions. [2022-07-21 17:18:52,511 INFO L78 Accepts]: Start accepts. Automaton has 9531 states and 12990 transitions. Word has length 60 [2022-07-21 17:18:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:52,511 INFO L495 AbstractCegarLoop]: Abstraction has 9531 states and 12990 transitions. [2022-07-21 17:18:52,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 9531 states and 12990 transitions. [2022-07-21 17:18:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 17:18:52,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:52,512 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:52,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-07-21 17:18:52,512 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:52,513 INFO L85 PathProgramCache]: Analyzing trace with hash -25117949, now seen corresponding path program 1 times [2022-07-21 17:18:52,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:52,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700823757] [2022-07-21 17:18:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:52,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:52,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:52,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:52,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700823757] [2022-07-21 17:18:52,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700823757] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:52,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039795425] [2022-07-21 17:18:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:52,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:52,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:52,549 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:18:52,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 17:18:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:52,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:18:52,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:52,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:18:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:52,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039795425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:18:52,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:18:52,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-07-21 17:18:52,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011502447] [2022-07-21 17:18:52,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:18:52,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:18:52,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:18:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:52,764 INFO L87 Difference]: Start difference. First operand 9531 states and 12990 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:52,822 INFO L93 Difference]: Finished difference Result 21124 states and 28459 transitions. [2022-07-21 17:18:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:18:52,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-07-21 17:18:52,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:52,848 INFO L225 Difference]: With dead ends: 21124 [2022-07-21 17:18:52,848 INFO L226 Difference]: Without dead ends: 21124 [2022-07-21 17:18:52,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:18:52,848 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 457 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:52,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 690 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21124 states. [2022-07-21 17:18:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21124 to 15627. [2022-07-21 17:18:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15627 states, 14841 states have (on average 1.3247085775891112) internal successors, (19660), 15010 states have internal predecessors, (19660), 727 states have call successors, (727), 25 states have call predecessors, (727), 25 states have return successors, (727), 591 states have call predecessors, (727), 727 states have call successors, (727) [2022-07-21 17:18:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15627 states to 15627 states and 21114 transitions. [2022-07-21 17:18:53,042 INFO L78 Accepts]: Start accepts. Automaton has 15627 states and 21114 transitions. Word has length 62 [2022-07-21 17:18:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:53,042 INFO L495 AbstractCegarLoop]: Abstraction has 15627 states and 21114 transitions. [2022-07-21 17:18:53,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 15627 states and 21114 transitions. [2022-07-21 17:18:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:18:53,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:53,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:53,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:18:53,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:53,261 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:53,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:53,261 INFO L85 PathProgramCache]: Analyzing trace with hash 279048111, now seen corresponding path program 1 times [2022-07-21 17:18:53,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:53,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987768904] [2022-07-21 17:18:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:53,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:53,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:53,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 17:18:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:18:53,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:53,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987768904] [2022-07-21 17:18:53,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987768904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:53,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:53,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:18:53,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654192528] [2022-07-21 17:18:53,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:53,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:18:53,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:53,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:18:53,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:53,292 INFO L87 Difference]: Start difference. First operand 15627 states and 21114 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:53,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:53,355 INFO L93 Difference]: Finished difference Result 31592 states and 42826 transitions. [2022-07-21 17:18:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:18:53,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-07-21 17:18:53,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:53,401 INFO L225 Difference]: With dead ends: 31592 [2022-07-21 17:18:53,401 INFO L226 Difference]: Without dead ends: 31592 [2022-07-21 17:18:53,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:18:53,401 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 277 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:53,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 746 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:18:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31592 states. [2022-07-21 17:18:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31592 to 15713. [2022-07-21 17:18:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15713 states, 14927 states have (on average 1.3241776646345549) internal successors, (19766), 15096 states have internal predecessors, (19766), 727 states have call successors, (727), 25 states have call predecessors, (727), 25 states have return successors, (727), 591 states have call predecessors, (727), 727 states have call successors, (727) [2022-07-21 17:18:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15713 states to 15713 states and 21220 transitions. [2022-07-21 17:18:53,637 INFO L78 Accepts]: Start accepts. Automaton has 15713 states and 21220 transitions. Word has length 63 [2022-07-21 17:18:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:53,638 INFO L495 AbstractCegarLoop]: Abstraction has 15713 states and 21220 transitions. [2022-07-21 17:18:53,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 15713 states and 21220 transitions. [2022-07-21 17:18:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:18:53,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:53,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:53,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-21 17:18:53,639 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:53,639 INFO L85 PathProgramCache]: Analyzing trace with hash 279048173, now seen corresponding path program 1 times [2022-07-21 17:18:53,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:53,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692842836] [2022-07-21 17:18:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:53,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:53,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:53,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 17:18:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:18:53,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:53,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692842836] [2022-07-21 17:18:53,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692842836] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:53,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:53,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:18:53,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317580972] [2022-07-21 17:18:53,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:53,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:53,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:53,687 INFO L87 Difference]: Start difference. First operand 15713 states and 21220 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:53,899 INFO L93 Difference]: Finished difference Result 17345 states and 23519 transitions. [2022-07-21 17:18:53,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:18:53,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-07-21 17:18:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:53,919 INFO L225 Difference]: With dead ends: 17345 [2022-07-21 17:18:53,920 INFO L226 Difference]: Without dead ends: 17345 [2022-07-21 17:18:53,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:18:53,920 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 140 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:53,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 627 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17345 states. [2022-07-21 17:18:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17345 to 15713. [2022-07-21 17:18:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15713 states, 14927 states have (on average 1.321966905607289) internal successors, (19733), 15096 states have internal predecessors, (19733), 727 states have call successors, (727), 25 states have call predecessors, (727), 25 states have return successors, (727), 591 states have call predecessors, (727), 727 states have call successors, (727) [2022-07-21 17:18:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15713 states to 15713 states and 21187 transitions. [2022-07-21 17:18:54,095 INFO L78 Accepts]: Start accepts. Automaton has 15713 states and 21187 transitions. Word has length 63 [2022-07-21 17:18:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:54,095 INFO L495 AbstractCegarLoop]: Abstraction has 15713 states and 21187 transitions. [2022-07-21 17:18:54,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 15713 states and 21187 transitions. [2022-07-21 17:18:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:18:54,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:54,096 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:54,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-07-21 17:18:54,096 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:54,097 INFO L85 PathProgramCache]: Analyzing trace with hash 279048174, now seen corresponding path program 1 times [2022-07-21 17:18:54,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:54,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615522467] [2022-07-21 17:18:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:54,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:54,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:54,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 17:18:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:18:54,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:54,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615522467] [2022-07-21 17:18:54,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615522467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:18:54,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:18:54,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:18:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168827095] [2022-07-21 17:18:54,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:18:54,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:18:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:18:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:18:54,147 INFO L87 Difference]: Start difference. First operand 15713 states and 21187 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:54,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:54,315 INFO L93 Difference]: Finished difference Result 15709 states and 20873 transitions. [2022-07-21 17:18:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:18:54,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-07-21 17:18:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:54,336 INFO L225 Difference]: With dead ends: 15709 [2022-07-21 17:18:54,336 INFO L226 Difference]: Without dead ends: 15709 [2022-07-21 17:18:54,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:18:54,336 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 144 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:54,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 582 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:18:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15709 states. [2022-07-21 17:18:54,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15709 to 15709. [2022-07-21 17:18:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15709 states, 14927 states have (on average 1.3009311984993637) internal successors, (19419), 15092 states have internal predecessors, (19419), 727 states have call successors, (727), 25 states have call predecessors, (727), 25 states have return successors, (727), 591 states have call predecessors, (727), 727 states have call successors, (727) [2022-07-21 17:18:54,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15709 states to 15709 states and 20873 transitions. [2022-07-21 17:18:54,494 INFO L78 Accepts]: Start accepts. Automaton has 15709 states and 20873 transitions. Word has length 63 [2022-07-21 17:18:54,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:54,494 INFO L495 AbstractCegarLoop]: Abstraction has 15709 states and 20873 transitions. [2022-07-21 17:18:54,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:18:54,494 INFO L276 IsEmpty]: Start isEmpty. Operand 15709 states and 20873 transitions. [2022-07-21 17:18:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:18:54,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:54,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:54,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-07-21 17:18:54,495 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:54,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:54,495 INFO L85 PathProgramCache]: Analyzing trace with hash -778657640, now seen corresponding path program 1 times [2022-07-21 17:18:54,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:54,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320354860] [2022-07-21 17:18:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:54,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:54,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:54,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:54,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320354860] [2022-07-21 17:18:54,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320354860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:54,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014039958] [2022-07-21 17:18:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:54,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:54,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:54,763 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:18:54,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 17:18:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:54,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-21 17:18:54,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:55,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:18:55,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:18:55,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2022-07-21 17:18:55,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2022-07-21 17:18:55,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:18:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:55,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:18:55,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 334 treesize of output 318 [2022-07-21 17:18:58,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014039958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:58,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:18:58,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2022-07-21 17:18:58,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632135014] [2022-07-21 17:18:58,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:18:58,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 17:18:58,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:18:58,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 17:18:58,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-07-21 17:18:58,635 INFO L87 Difference]: Start difference. First operand 15709 states and 20873 transitions. Second operand has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:58,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:18:58,854 INFO L93 Difference]: Finished difference Result 15755 states and 20932 transitions. [2022-07-21 17:18:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:18:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-07-21 17:18:58,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:18:58,877 INFO L225 Difference]: With dead ends: 15755 [2022-07-21 17:18:58,877 INFO L226 Difference]: Without dead ends: 15744 [2022-07-21 17:18:58,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-07-21 17:18:58,878 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 130 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:18:58,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1645 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 436 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2022-07-21 17:18:58,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15744 states. [2022-07-21 17:18:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15744 to 15737. [2022-07-21 17:18:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15737 states, 14955 states have (on average 1.300835840855901) internal successors, (19454), 15120 states have internal predecessors, (19454), 727 states have call successors, (727), 25 states have call predecessors, (727), 25 states have return successors, (727), 591 states have call predecessors, (727), 727 states have call successors, (727) [2022-07-21 17:18:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15737 states to 15737 states and 20908 transitions. [2022-07-21 17:18:59,064 INFO L78 Accepts]: Start accepts. Automaton has 15737 states and 20908 transitions. Word has length 63 [2022-07-21 17:18:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:18:59,064 INFO L495 AbstractCegarLoop]: Abstraction has 15737 states and 20908 transitions. [2022-07-21 17:18:59,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:18:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 15737 states and 20908 transitions. [2022-07-21 17:18:59,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:18:59,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:18:59,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:18:59,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:18:59,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-21 17:18:59,285 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:18:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:18:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash -520492202, now seen corresponding path program 1 times [2022-07-21 17:18:59,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:18:59,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651987300] [2022-07-21 17:18:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:59,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:18:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:59,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:18:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:18:59,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:18:59,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651987300] [2022-07-21 17:18:59,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651987300] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:18:59,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804316052] [2022-07-21 17:18:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:18:59,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:18:59,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:18:59,463 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:18:59,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 17:18:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:18:59,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 17:18:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:18:59,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:19:00,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:19:00,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2022-07-21 17:19:00,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:19:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:19:00,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:19:00,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2022-07-21 17:19:02,262 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_antiDerIndex_entry0_2 Int) (v_arrayElimCell_29 Int)) (let ((.cse2 (let ((.cse3 (* ~unnamed1~0~LIST_END 4))) (= (+ |c_~#list~0.offset| .cse3) (+ .cse3 |c_ULTIMATE.start_append_one_~list#1.offset|)))) (.cse1 (= |c_~#list~0.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse0 (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_2))) (or (and (= (select (store |c_#valid| v_arrayElimCell_29 0) v_antiDerIndex_entry0_2) .cse0) (or (not .cse1) (not .cse2))) (and .cse2 .cse1 (= (select (store |c_#valid| |c_ULTIMATE.start_append_one_~item~1#1.base| 0) v_antiDerIndex_entry0_2) .cse0))))) is different from false [2022-07-21 17:19:03,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804316052] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:19:03,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:19:03,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-07-21 17:19:03,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48849591] [2022-07-21 17:19:03,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:19:03,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 17:19:03,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:19:03,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 17:19:03,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=769, Unknown=1, NotChecked=56, Total=930 [2022-07-21 17:19:03,332 INFO L87 Difference]: Start difference. First operand 15737 states and 20908 transitions. Second operand has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:19:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:19:03,665 INFO L93 Difference]: Finished difference Result 15754 states and 20930 transitions. [2022-07-21 17:19:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:19:03,666 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-07-21 17:19:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:19:03,684 INFO L225 Difference]: With dead ends: 15754 [2022-07-21 17:19:03,684 INFO L226 Difference]: Without dead ends: 15741 [2022-07-21 17:19:03,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=156, Invalid=1037, Unknown=1, NotChecked=66, Total=1260 [2022-07-21 17:19:03,685 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 186 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:19:03,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 1514 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 267 Invalid, 0 Unknown, 285 Unchecked, 0.1s Time] [2022-07-21 17:19:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15741 states. [2022-07-21 17:19:03,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15741 to 15735. [2022-07-21 17:19:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15735 states, 14953 states have (on average 1.300742325954658) internal successors, (19450), 15118 states have internal predecessors, (19450), 727 states have call successors, (727), 25 states have call predecessors, (727), 25 states have return successors, (727), 591 states have call predecessors, (727), 727 states have call successors, (727) [2022-07-21 17:19:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15735 states to 15735 states and 20904 transitions. [2022-07-21 17:19:03,835 INFO L78 Accepts]: Start accepts. Automaton has 15735 states and 20904 transitions. Word has length 63 [2022-07-21 17:19:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:19:03,836 INFO L495 AbstractCegarLoop]: Abstraction has 15735 states and 20904 transitions. [2022-07-21 17:19:03,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:19:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 15735 states and 20904 transitions. [2022-07-21 17:19:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 17:19:03,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:19:03,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:19:03,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:19:04,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-21 17:19:04,049 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:19:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:19:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1581065855, now seen corresponding path program 1 times [2022-07-21 17:19:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:19:04,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349836035] [2022-07-21 17:19:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:19:04,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:19:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:04,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:19:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:04,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 17:19:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:19:04,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:19:04,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349836035] [2022-07-21 17:19:04,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349836035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:19:04,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:19:04,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 17:19:04,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247531245] [2022-07-21 17:19:04,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:19:04,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:19:04,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:19:04,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:19:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:19:04,212 INFO L87 Difference]: Start difference. First operand 15735 states and 20904 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:19:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:19:04,711 INFO L93 Difference]: Finished difference Result 18082 states and 23922 transitions. [2022-07-21 17:19:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 17:19:04,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-07-21 17:19:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:19:04,733 INFO L225 Difference]: With dead ends: 18082 [2022-07-21 17:19:04,733 INFO L226 Difference]: Without dead ends: 18082 [2022-07-21 17:19:04,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:19:04,733 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 946 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:19:04,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 1547 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:19:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18082 states. [2022-07-21 17:19:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18082 to 15866. [2022-07-21 17:19:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15866 states, 15084 states have (on average 1.3005833996287457) internal successors, (19618), 15249 states have internal predecessors, (19618), 727 states have call successors, (727), 25 states have call predecessors, (727), 25 states have return successors, (727), 591 states have call predecessors, (727), 727 states have call successors, (727) [2022-07-21 17:19:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15866 states to 15866 states and 21072 transitions. [2022-07-21 17:19:04,966 INFO L78 Accepts]: Start accepts. Automaton has 15866 states and 21072 transitions. Word has length 64 [2022-07-21 17:19:04,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:19:04,967 INFO L495 AbstractCegarLoop]: Abstraction has 15866 states and 21072 transitions. [2022-07-21 17:19:04,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:19:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 15866 states and 21072 transitions. [2022-07-21 17:19:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 17:19:04,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:19:04,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:19:04,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-07-21 17:19:04,968 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:19:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:19:04,968 INFO L85 PathProgramCache]: Analyzing trace with hash 15703619, now seen corresponding path program 1 times [2022-07-21 17:19:04,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:19:04,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994380798] [2022-07-21 17:19:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:19:04,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:19:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:05,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:19:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:05,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 17:19:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:19:05,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:19:05,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994380798] [2022-07-21 17:19:05,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994380798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:19:05,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237299329] [2022-07-21 17:19:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:19:05,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:19:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:19:05,338 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:19:05,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 17:19:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:05,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-21 17:19:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:19:05,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:19:05,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:05,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 17:19:06,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-07-21 17:19:06,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:19:06,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:06,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2022-07-21 17:19:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:19:06,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:19:06,374 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:19:06,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 46 [2022-07-21 17:19:06,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 130 [2022-07-21 17:19:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:19:07,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237299329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:19:07,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:19:07,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16] total 47 [2022-07-21 17:19:07,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335500665] [2022-07-21 17:19:07,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:19:07,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 17:19:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:19:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 17:19:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 17:19:07,047 INFO L87 Difference]: Start difference. First operand 15866 states and 21072 transitions. Second operand has 48 states, 47 states have (on average 3.7872340425531914) internal successors, (178), 45 states have internal predecessors, (178), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:19:10,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:19:10,626 INFO L93 Difference]: Finished difference Result 70929 states and 94901 transitions. [2022-07-21 17:19:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-21 17:19:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.7872340425531914) internal successors, (178), 45 states have internal predecessors, (178), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 64 [2022-07-21 17:19:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:19:10,733 INFO L225 Difference]: With dead ends: 70929 [2022-07-21 17:19:10,733 INFO L226 Difference]: Without dead ends: 70929 [2022-07-21 17:19:10,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=985, Invalid=7387, Unknown=0, NotChecked=0, Total=8372 [2022-07-21 17:19:10,734 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 4622 mSDsluCounter, 8998 mSDsCounter, 0 mSdLazyCounter, 3111 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4629 SdHoareTripleChecker+Valid, 9409 SdHoareTripleChecker+Invalid, 3872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 3111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:19:10,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4629 Valid, 9409 Invalid, 3872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 3111 Invalid, 0 Unknown, 468 Unchecked, 1.6s Time] [2022-07-21 17:19:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70929 states. [2022-07-21 17:19:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70929 to 28269. [2022-07-21 17:19:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28269 states, 26912 states have (on average 1.3023929845422118) internal successors, (35050), 27145 states have internal predecessors, (35050), 1281 states have call successors, (1281), 47 states have call predecessors, (1281), 47 states have return successors, (1281), 1076 states have call predecessors, (1281), 1281 states have call successors, (1281) [2022-07-21 17:19:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28269 states to 28269 states and 37612 transitions. [2022-07-21 17:19:11,313 INFO L78 Accepts]: Start accepts. Automaton has 28269 states and 37612 transitions. Word has length 64 [2022-07-21 17:19:11,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:19:11,314 INFO L495 AbstractCegarLoop]: Abstraction has 28269 states and 37612 transitions. [2022-07-21 17:19:11,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.7872340425531914) internal successors, (178), 45 states have internal predecessors, (178), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:19:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 28269 states and 37612 transitions. [2022-07-21 17:19:11,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 17:19:11,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:19:11,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:19:11,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:19:11,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:19:11,529 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:19:11,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:19:11,529 INFO L85 PathProgramCache]: Analyzing trace with hash 15703618, now seen corresponding path program 1 times [2022-07-21 17:19:11,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:19:11,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864705778] [2022-07-21 17:19:11,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:19:11,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:19:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:11,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:19:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:11,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 17:19:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:19:11,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:19:11,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864705778] [2022-07-21 17:19:11,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864705778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:19:11,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:19:11,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:19:11,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809761679] [2022-07-21 17:19:11,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:19:11,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:19:11,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:19:11,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:19:11,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:19:11,568 INFO L87 Difference]: Start difference. First operand 28269 states and 37612 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:19:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:19:11,798 INFO L93 Difference]: Finished difference Result 36764 states and 48749 transitions. [2022-07-21 17:19:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:19:11,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-07-21 17:19:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:19:11,851 INFO L225 Difference]: With dead ends: 36764 [2022-07-21 17:19:11,851 INFO L226 Difference]: Without dead ends: 36764 [2022-07-21 17:19:11,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:19:11,851 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 117 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:19:11,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 837 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:19:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36764 states. [2022-07-21 17:19:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36764 to 28267. [2022-07-21 17:19:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28267 states, 26912 states have (on average 1.2962990487514863) internal successors, (34886), 27143 states have internal predecessors, (34886), 1281 states have call successors, (1281), 47 states have call predecessors, (1281), 47 states have return successors, (1281), 1076 states have call predecessors, (1281), 1281 states have call successors, (1281) [2022-07-21 17:19:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28267 states to 28267 states and 37448 transitions. [2022-07-21 17:19:12,281 INFO L78 Accepts]: Start accepts. Automaton has 28267 states and 37448 transitions. Word has length 64 [2022-07-21 17:19:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:19:12,282 INFO L495 AbstractCegarLoop]: Abstraction has 28267 states and 37448 transitions. [2022-07-21 17:19:12,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:19:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 28267 states and 37448 transitions. [2022-07-21 17:19:12,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 17:19:12,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:19:12,283 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:19:12,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-07-21 17:19:12,283 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:19:12,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:19:12,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1768401507, now seen corresponding path program 1 times [2022-07-21 17:19:12,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:19:12,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787654290] [2022-07-21 17:19:12,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:19:12,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:19:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:12,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:19:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:12,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 17:19:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:19:12,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:19:12,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787654290] [2022-07-21 17:19:12,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787654290] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:19:12,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:19:12,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-21 17:19:12,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685619160] [2022-07-21 17:19:12,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:19:12,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:19:12,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:19:12,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:19:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:19:12,465 INFO L87 Difference]: Start difference. First operand 28267 states and 37448 transitions. Second operand has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 13 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:19:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:19:13,042 INFO L93 Difference]: Finished difference Result 31502 states and 41610 transitions. [2022-07-21 17:19:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 17:19:13,043 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 13 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-07-21 17:19:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:19:13,087 INFO L225 Difference]: With dead ends: 31502 [2022-07-21 17:19:13,087 INFO L226 Difference]: Without dead ends: 31502 [2022-07-21 17:19:13,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:19:13,087 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 962 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:19:13,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 1258 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:19:13,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31502 states. [2022-07-21 17:19:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31502 to 28324. [2022-07-21 17:19:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28324 states, 26969 states have (on average 1.2951166153732063) internal successors, (34928), 27200 states have internal predecessors, (34928), 1281 states have call successors, (1281), 47 states have call predecessors, (1281), 47 states have return successors, (1281), 1076 states have call predecessors, (1281), 1281 states have call successors, (1281) [2022-07-21 17:19:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28324 states to 28324 states and 37490 transitions. [2022-07-21 17:19:13,564 INFO L78 Accepts]: Start accepts. Automaton has 28324 states and 37490 transitions. Word has length 65 [2022-07-21 17:19:13,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:19:13,564 INFO L495 AbstractCegarLoop]: Abstraction has 28324 states and 37490 transitions. [2022-07-21 17:19:13,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 13 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:19:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 28324 states and 37490 transitions. [2022-07-21 17:19:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 17:19:13,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:19:13,566 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:19:13,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-07-21 17:19:13,566 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:19:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:19:13,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1014127871, now seen corresponding path program 1 times [2022-07-21 17:19:13,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:19:13,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867242806] [2022-07-21 17:19:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:19:13,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:19:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:13,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:19:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:13,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 17:19:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:19:13,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:19:13,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867242806] [2022-07-21 17:19:13,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867242806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:19:13,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:19:13,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 17:19:13,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522035034] [2022-07-21 17:19:13,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:19:13,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:19:13,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:19:13,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:19:13,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:19:13,772 INFO L87 Difference]: Start difference. First operand 28324 states and 37490 transitions. Second operand has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:19:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:19:14,450 INFO L93 Difference]: Finished difference Result 33692 states and 44684 transitions. [2022-07-21 17:19:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:19:14,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-07-21 17:19:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:19:14,496 INFO L225 Difference]: With dead ends: 33692 [2022-07-21 17:19:14,496 INFO L226 Difference]: Without dead ends: 33692 [2022-07-21 17:19:14,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:19:14,496 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 979 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:19:14,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [981 Valid, 1524 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:19:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33692 states. [2022-07-21 17:19:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33692 to 28646. [2022-07-21 17:19:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28646 states, 27291 states have (on average 1.2943461214319738) internal successors, (35324), 27522 states have internal predecessors, (35324), 1281 states have call successors, (1281), 47 states have call predecessors, (1281), 47 states have return successors, (1281), 1076 states have call predecessors, (1281), 1281 states have call successors, (1281) [2022-07-21 17:19:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28646 states to 28646 states and 37886 transitions. [2022-07-21 17:19:14,868 INFO L78 Accepts]: Start accepts. Automaton has 28646 states and 37886 transitions. Word has length 66 [2022-07-21 17:19:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:19:14,868 INFO L495 AbstractCegarLoop]: Abstraction has 28646 states and 37886 transitions. [2022-07-21 17:19:14,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:19:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 28646 states and 37886 transitions. [2022-07-21 17:19:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 17:19:14,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:19:14,869 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:19:14,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-07-21 17:19:14,869 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:19:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:19:14,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1373192667, now seen corresponding path program 1 times [2022-07-21 17:19:14,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:19:14,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019090562] [2022-07-21 17:19:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:19:14,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:19:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:15,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:19:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:15,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 17:19:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:19:15,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:19:15,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019090562] [2022-07-21 17:19:15,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019090562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:19:15,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100781953] [2022-07-21 17:19:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:19:15,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:19:15,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:19:15,146 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:19:15,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 17:19:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:15,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 17:19:15,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:19:15,351 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:19:15,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 17:19:15,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:19:15,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:15,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:15,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:19:15,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 34 [2022-07-21 17:19:16,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2022-07-21 17:19:16,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:19:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:19:16,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:19:16,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100781953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:19:16,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:19:16,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 26 [2022-07-21 17:19:16,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917831154] [2022-07-21 17:19:16,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:19:16,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:19:16,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:19:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:19:16,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:19:16,097 INFO L87 Difference]: Start difference. First operand 28646 states and 37886 transitions. Second operand has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:19:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:19:18,462 INFO L93 Difference]: Finished difference Result 56050 states and 74638 transitions. [2022-07-21 17:19:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 17:19:18,463 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-07-21 17:19:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:19:18,555 INFO L225 Difference]: With dead ends: 56050 [2022-07-21 17:19:18,555 INFO L226 Difference]: Without dead ends: 56050 [2022-07-21 17:19:18,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=813, Invalid=2969, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 17:19:18,556 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1632 mSDsluCounter, 2401 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 2799 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:19:18,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 2799 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 17:19:18,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56050 states. [2022-07-21 17:19:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56050 to 40453. [2022-07-21 17:19:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40453 states, 38555 states have (on average 1.287355725586824) internal successors, (49634), 38873 states have internal predecessors, (49634), 1803 states have call successors, (1803), 68 states have call predecessors, (1803), 68 states have return successors, (1803), 1511 states have call predecessors, (1803), 1803 states have call successors, (1803) [2022-07-21 17:19:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40453 states to 40453 states and 53240 transitions. [2022-07-21 17:19:19,091 INFO L78 Accepts]: Start accepts. Automaton has 40453 states and 53240 transitions. Word has length 67 [2022-07-21 17:19:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:19:19,091 INFO L495 AbstractCegarLoop]: Abstraction has 40453 states and 53240 transitions. [2022-07-21 17:19:19,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:19:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 40453 states and 53240 transitions. [2022-07-21 17:19:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 17:19:19,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:19:19,092 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:19:19,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 17:19:19,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:19:19,307 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-07-21 17:19:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:19:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash 221255347, now seen corresponding path program 1 times [2022-07-21 17:19:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:19:19,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66896764] [2022-07-21 17:19:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:19:19,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:19:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:20,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 17:19:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:20,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 17:19:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:19:20,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:19:20,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66896764] [2022-07-21 17:19:20,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66896764] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:19:20,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072544142] [2022-07-21 17:19:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:19:20,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:19:20,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:19:20,606 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:19:20,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 17:19:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:19:20,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 124 conjunts are in the unsatisfiable core [2022-07-21 17:19:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:19:20,800 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:19:20,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 17:19:20,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:19:20,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:19:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:21,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 17:19:21,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:21,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 17:19:21,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:21,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 17:19:21,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:21,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-21 17:19:21,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:21,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:19:21,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:21,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:19:21,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:21,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 17:19:21,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:21,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2022-07-21 17:19:21,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:21,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 77 [2022-07-21 17:19:21,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:21,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:19:21,600 INFO L356 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2022-07-21 17:19:21,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 71 [2022-07-21 17:19:22,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 58 [2022-07-21 17:19:22,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:19:22,293 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:19:22,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 14 [2022-07-21 17:19:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:19:22,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:19:37,855 INFO L356 Elim1Store]: treesize reduction 90, result has 38.8 percent of original size [2022-07-21 17:19:37,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 246 treesize of output 255 [2022-07-21 17:19:37,896 INFO L356 Elim1Store]: treesize reduction 90, result has 38.8 percent of original size [2022-07-21 17:19:37,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 198 treesize of output 159 [2022-07-21 17:19:37,926 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:19:37,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1154 treesize of output 1160 [2022-07-21 17:19:38,161 INFO L356 Elim1Store]: treesize reduction 152, result has 68.4 percent of original size [2022-07-21 17:19:38,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 81476 treesize of output 75304 [2022-07-21 17:19:38,546 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:19:38,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 430158 treesize of output 392060 [2022-07-21 17:19:40,045 INFO L390 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 392582 treesize of output 389654