./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/lockfree-3.0.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/lockfree-3.0.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 ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:49:37,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:49:37,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:49:37,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:49:37,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:49:37,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:49:37,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:49:37,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:49:37,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:49:37,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:49:37,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:49:37,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:49:37,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:49:37,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:49:37,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:49:37,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:49:37,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:49:37,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:49:37,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:49:37,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:49:37,193 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:49:37,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:49:37,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:49:37,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:49:37,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:49:37,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:49:37,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:49:37,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:49:37,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:49:37,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:49:37,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:49:37,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:49:37,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:49:37,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:49:37,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:49:37,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:49:37,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:49:37,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:49:37,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:49:37,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:49:37,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:49:37,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:49:37,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:49:37,243 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:49:37,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:49:37,244 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:49:37,244 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:49:37,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:49:37,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:49:37,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:49:37,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:49:37,246 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:49:37,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:49:37,248 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:49:37,248 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:49:37,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:49:37,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:49:37,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:49:37,249 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:49:37,249 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:49:37,249 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:49:37,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:49:37,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:49:37,251 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:49:37,251 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:49:37,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:49:37,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:49:37,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:49:37,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:49:37,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:49:37,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:49:37,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:49:37,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:49:37,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea [2022-07-23 05:49:37,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:49:37,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:49:37,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:49:37,541 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:49:37,541 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:49:37,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/lockfree-3.0.i [2022-07-23 05:49:37,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47d600ffe/d8cf5f5a6cdb415e9d0e0dfb8bfc65ca/FLAG26e9d3367 [2022-07-23 05:49:38,029 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:49:38,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/lockfree-3.0.i [2022-07-23 05:49:38,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47d600ffe/d8cf5f5a6cdb415e9d0e0dfb8bfc65ca/FLAG26e9d3367 [2022-07-23 05:49:38,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47d600ffe/d8cf5f5a6cdb415e9d0e0dfb8bfc65ca [2022-07-23 05:49:38,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:49:38,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:49:38,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:49:38,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:49:38,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:49:38,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@494f9819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38, skipping insertion in model container [2022-07-23 05:49:38,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:49:38,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:49:38,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:49:38,469 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:49:38,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:49:38,541 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:49:38,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38 WrapperNode [2022-07-23 05:49:38,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:49:38,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:49:38,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:49:38,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:49:38,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,589 INFO L137 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 120 [2022-07-23 05:49:38,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:49:38,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:49:38,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:49:38,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:49:38,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:49:38,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:49:38,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:49:38,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:49:38,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38" (1/1) ... [2022-07-23 05:49:38,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:49:38,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:38,659 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) [2022-07-23 05:49:38,665 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 [2022-07-23 05:49:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 05:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 05:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 05:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 05:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 05:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 05:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:49:38,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 05:49:38,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:49:38,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:49:38,791 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:49:38,793 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:49:39,094 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:49:39,104 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:49:39,106 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-23 05:49:39,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:49:39 BoogieIcfgContainer [2022-07-23 05:49:39,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:49:39,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:49:39,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:49:39,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:49:39,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:49:38" (1/3) ... [2022-07-23 05:49:39,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e1dfdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:49:39, skipping insertion in model container [2022-07-23 05:49:39,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:49:38" (2/3) ... [2022-07-23 05:49:39,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e1dfdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:49:39, skipping insertion in model container [2022-07-23 05:49:39,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:49:39" (3/3) ... [2022-07-23 05:49:39,127 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.0.i [2022-07-23 05:49:39,140 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:49:39,140 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-07-23 05:49:39,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:49:39,198 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@6a788668, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@716a1837 [2022-07-23 05:49:39,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-07-23 05:49:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 43 states have (on average 1.930232558139535) internal successors, (83), 63 states have internal predecessors, (83), 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) [2022-07-23 05:49:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-23 05:49:39,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:39,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-23 05:49:39,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash 28819106, now seen corresponding path program 1 times [2022-07-23 05:49:39,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:39,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584507909] [2022-07-23 05:49:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:39,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:39,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:39,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584507909] [2022-07-23 05:49:39,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584507909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:49:39,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:49:39,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:49:39,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874757495] [2022-07-23 05:49:39,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:39,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-23 05:49:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:39,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-23 05:49:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-23 05:49:39,409 INFO L87 Difference]: Start difference. First operand has 64 states, 43 states have (on average 1.930232558139535) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-07-23 05:49:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:39,428 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2022-07-23 05:49:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-23 05:49:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-07-23 05:49:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:39,439 INFO L225 Difference]: With dead ends: 64 [2022-07-23 05:49:39,440 INFO L226 Difference]: Without dead ends: 62 [2022-07-23 05:49:39,442 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 [2022-07-23 05:49:39,445 INFO L413 NwaCegarLoop]: 81 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, 81 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 [2022-07-23 05:49:39,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-23 05:49:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-23 05:49:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.880952380952381) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-07-23 05:49:39,481 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 5 [2022-07-23 05:49:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:39,482 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-07-23 05:49:39,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-07-23 05:49:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-07-23 05:49:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:49:39,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:39,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:39,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:49:39,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1806851052, now seen corresponding path program 1 times [2022-07-23 05:49:39,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:39,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753908184] [2022-07-23 05:49:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:39,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:39,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:39,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753908184] [2022-07-23 05:49:39,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753908184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:49:39,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:49:39,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:49:39,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448209530] [2022-07-23 05:49:39,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:39,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:49:39,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:39,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:49:39,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:49:39,557 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:39,586 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2022-07-23 05:49:39,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:49:39,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:49:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:39,592 INFO L225 Difference]: With dead ends: 63 [2022-07-23 05:49:39,592 INFO L226 Difference]: Without dead ends: 63 [2022-07-23 05:49:39,595 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 [2022-07-23 05:49:39,597 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 151 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 [2022-07-23 05:49:39,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 151 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-23 05:49:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-23 05:49:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 62 states have internal predecessors, (80), 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) [2022-07-23 05:49:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2022-07-23 05:49:39,617 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 7 [2022-07-23 05:49:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:39,618 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2022-07-23 05:49:39,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2022-07-23 05:49:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:49:39,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:39,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:39,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 05:49:39,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:39,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1806910634, now seen corresponding path program 1 times [2022-07-23 05:49:39,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:39,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947628528] [2022-07-23 05:49:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:39,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:39,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:39,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947628528] [2022-07-23 05:49:39,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947628528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:49:39,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:49:39,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:49:39,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206505040] [2022-07-23 05:49:39,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:39,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:49:39,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:39,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:49:39,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:49:39,673 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:39,722 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2022-07-23 05:49:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:49:39,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:49:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:39,723 INFO L225 Difference]: With dead ends: 111 [2022-07-23 05:49:39,724 INFO L226 Difference]: Without dead ends: 111 [2022-07-23 05:49:39,725 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 [2022-07-23 05:49:39,726 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 62 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:39,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 138 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-23 05:49:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2022-07-23 05:49:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.8767123287671232) internal successors, (137), 92 states have internal predecessors, (137), 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) [2022-07-23 05:49:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 137 transitions. [2022-07-23 05:49:39,741 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 137 transitions. Word has length 7 [2022-07-23 05:49:39,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:39,742 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 137 transitions. [2022-07-23 05:49:39,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 137 transitions. [2022-07-23 05:49:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:49:39,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:39,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:39,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 05:49:39,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:39,744 INFO L85 PathProgramCache]: Analyzing trace with hash 177749355, now seen corresponding path program 1 times [2022-07-23 05:49:39,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:39,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062744345] [2022-07-23 05:49:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:39,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:39,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062744345] [2022-07-23 05:49:39,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062744345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:49:39,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:49:39,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:49:39,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325316837] [2022-07-23 05:49:39,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:39,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:49:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:49:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:49:39,797 INFO L87 Difference]: Start difference. First operand 93 states and 137 transitions. Second operand has 4 states, 4 states have (on average 2.0) 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) [2022-07-23 05:49:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:39,850 INFO L93 Difference]: Finished difference Result 101 states and 146 transitions. [2022-07-23 05:49:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:49:39,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) 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 [2022-07-23 05:49:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:39,853 INFO L225 Difference]: With dead ends: 101 [2022-07-23 05:49:39,854 INFO L226 Difference]: Without dead ends: 101 [2022-07-23 05:49:39,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:49:39,855 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 6 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:39,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 211 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-23 05:49:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2022-07-23 05:49:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 94 states have internal predecessors, (139), 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) [2022-07-23 05:49:39,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 139 transitions. [2022-07-23 05:49:39,877 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 139 transitions. Word has length 8 [2022-07-23 05:49:39,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:39,877 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 139 transitions. [2022-07-23 05:49:39,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) 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) [2022-07-23 05:49:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 139 transitions. [2022-07-23 05:49:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:49:39,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:39,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:39,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 05:49:39,879 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:39,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:39,880 INFO L85 PathProgramCache]: Analyzing trace with hash 179653412, now seen corresponding path program 1 times [2022-07-23 05:49:39,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:39,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728273175] [2022-07-23 05:49:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:39,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:39,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:39,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728273175] [2022-07-23 05:49:39,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728273175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:49:39,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:49:39,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:49:39,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115293635] [2022-07-23 05:49:39,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:39,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:49:39,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:39,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:49:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:49:39,926 INFO L87 Difference]: Start difference. First operand 95 states and 139 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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) [2022-07-23 05:49:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:39,977 INFO L93 Difference]: Finished difference Result 177 states and 261 transitions. [2022-07-23 05:49:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:49:39,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 [2022-07-23 05:49:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:39,979 INFO L225 Difference]: With dead ends: 177 [2022-07-23 05:49:39,979 INFO L226 Difference]: Without dead ends: 174 [2022-07-23 05:49:39,979 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 [2022-07-23 05:49:39,980 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:39,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 121 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:39,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-23 05:49:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 153. [2022-07-23 05:49:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 133 states have (on average 1.849624060150376) internal successors, (246), 152 states have internal predecessors, (246), 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) [2022-07-23 05:49:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 246 transitions. [2022-07-23 05:49:39,991 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 246 transitions. Word has length 8 [2022-07-23 05:49:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:39,991 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 246 transitions. [2022-07-23 05:49:39,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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) [2022-07-23 05:49:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 246 transitions. [2022-07-23 05:49:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:49:39,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:39,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:39,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 05:49:39,993 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:39,993 INFO L85 PathProgramCache]: Analyzing trace with hash 179596397, now seen corresponding path program 1 times [2022-07-23 05:49:39,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:39,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144507467] [2022-07-23 05:49:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:39,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:40,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144507467] [2022-07-23 05:49:40,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144507467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:49:40,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:49:40,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:49:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553572465] [2022-07-23 05:49:40,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:40,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:49:40,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:49:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:49:40,032 INFO L87 Difference]: Start difference. First operand 153 states and 246 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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) [2022-07-23 05:49:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:40,096 INFO L93 Difference]: Finished difference Result 231 states and 355 transitions. [2022-07-23 05:49:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:49:40,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 [2022-07-23 05:49:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:40,100 INFO L225 Difference]: With dead ends: 231 [2022-07-23 05:49:40,100 INFO L226 Difference]: Without dead ends: 231 [2022-07-23 05:49:40,101 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 [2022-07-23 05:49:40,102 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 69 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:40,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 172 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:49:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-23 05:49:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 208. [2022-07-23 05:49:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 190 states have (on average 1.7894736842105263) internal successors, (340), 207 states have internal predecessors, (340), 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) [2022-07-23 05:49:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 340 transitions. [2022-07-23 05:49:40,129 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 340 transitions. Word has length 8 [2022-07-23 05:49:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:40,129 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 340 transitions. [2022-07-23 05:49:40,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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) [2022-07-23 05:49:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 340 transitions. [2022-07-23 05:49:40,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:49:40,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:40,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:40,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 05:49:40,131 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:40,131 INFO L85 PathProgramCache]: Analyzing trace with hash 179596398, now seen corresponding path program 1 times [2022-07-23 05:49:40,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:40,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526226687] [2022-07-23 05:49:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:40,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:40,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:40,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526226687] [2022-07-23 05:49:40,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526226687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:49:40,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:49:40,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:49:40,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733107431] [2022-07-23 05:49:40,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:40,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:49:40,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:40,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:49:40,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:49:40,195 INFO L87 Difference]: Start difference. First operand 208 states and 340 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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) [2022-07-23 05:49:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:40,237 INFO L93 Difference]: Finished difference Result 226 states and 346 transitions. [2022-07-23 05:49:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:49:40,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 [2022-07-23 05:49:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:40,239 INFO L225 Difference]: With dead ends: 226 [2022-07-23 05:49:40,239 INFO L226 Difference]: Without dead ends: 226 [2022-07-23 05:49:40,240 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 [2022-07-23 05:49:40,242 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 68 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:40,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 180 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-07-23 05:49:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2022-07-23 05:49:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 190 states have (on average 1.7473684210526317) internal successors, (332), 205 states have internal predecessors, (332), 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) [2022-07-23 05:49:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 332 transitions. [2022-07-23 05:49:40,260 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 332 transitions. Word has length 8 [2022-07-23 05:49:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:40,260 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 332 transitions. [2022-07-23 05:49:40,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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) [2022-07-23 05:49:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 332 transitions. [2022-07-23 05:49:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:49:40,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:40,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:40,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-23 05:49:40,262 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:40,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:40,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1272529015, now seen corresponding path program 1 times [2022-07-23 05:49:40,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:40,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731008435] [2022-07-23 05:49:40,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:40,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:40,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:40,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731008435] [2022-07-23 05:49:40,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731008435] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:49:40,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:49:40,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:49:40,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514755778] [2022-07-23 05:49:40,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:40,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:49:40,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:40,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:49:40,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:49:40,318 INFO L87 Difference]: Start difference. First operand 206 states and 332 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-23 05:49:40,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:40,347 INFO L93 Difference]: Finished difference Result 265 states and 366 transitions. [2022-07-23 05:49:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:49:40,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 05:49:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:40,349 INFO L225 Difference]: With dead ends: 265 [2022-07-23 05:49:40,349 INFO L226 Difference]: Without dead ends: 265 [2022-07-23 05:49:40,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:49:40,350 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 105 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:40,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 279 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-23 05:49:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 163. [2022-07-23 05:49:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 151 states have (on average 1.6821192052980132) internal successors, (254), 162 states have internal predecessors, (254), 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) [2022-07-23 05:49:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 254 transitions. [2022-07-23 05:49:40,359 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 254 transitions. Word has length 9 [2022-07-23 05:49:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:40,359 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 254 transitions. [2022-07-23 05:49:40,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-23 05:49:40,360 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 254 transitions. [2022-07-23 05:49:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:49:40,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:40,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-23 05:49:40,362 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash 845049582, now seen corresponding path program 1 times [2022-07-23 05:49:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:40,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490627717] [2022-07-23 05:49:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:40,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:40,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:40,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490627717] [2022-07-23 05:49:40,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490627717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:49:40,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:49:40,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:49:40,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078669940] [2022-07-23 05:49:40,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:40,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:49:40,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:40,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:49:40,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:49:40,407 INFO L87 Difference]: Start difference. First operand 163 states and 254 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:40,454 INFO L93 Difference]: Finished difference Result 362 states and 528 transitions. [2022-07-23 05:49:40,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:49:40,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-23 05:49:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:40,455 INFO L225 Difference]: With dead ends: 362 [2022-07-23 05:49:40,455 INFO L226 Difference]: Without dead ends: 362 [2022-07-23 05:49:40,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:49:40,456 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 107 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:40,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 232 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-07-23 05:49:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 234. [2022-07-23 05:49:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.6036036036036037) internal successors, (356), 233 states have internal predecessors, (356), 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) [2022-07-23 05:49:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 356 transitions. [2022-07-23 05:49:40,462 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 356 transitions. Word has length 10 [2022-07-23 05:49:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:40,462 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 356 transitions. [2022-07-23 05:49:40,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 356 transitions. [2022-07-23 05:49:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 05:49:40,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:40,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:40,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-23 05:49:40,463 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 22246394, now seen corresponding path program 1 times [2022-07-23 05:49:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:40,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772945162] [2022-07-23 05:49:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:40,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:40,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:40,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772945162] [2022-07-23 05:49:40,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772945162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:40,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112733822] [2022-07-23 05:49:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:40,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:40,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:40,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:49:40,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 05:49:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:40,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:49:40,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:40,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:40,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112733822] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:40,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:40,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-07-23 05:49:40,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638619912] [2022-07-23 05:49:40,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:40,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:49:40,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:40,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:49:40,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:49:40,661 INFO L87 Difference]: Start difference. First operand 234 states and 356 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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) [2022-07-23 05:49:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:40,695 INFO L93 Difference]: Finished difference Result 238 states and 346 transitions. [2022-07-23 05:49:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:49:40,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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 16 [2022-07-23 05:49:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:40,696 INFO L225 Difference]: With dead ends: 238 [2022-07-23 05:49:40,697 INFO L226 Difference]: Without dead ends: 238 [2022-07-23 05:49:40,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:49:40,698 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 142 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:40,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 338 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:40,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-23 05:49:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2022-07-23 05:49:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 218 states have (on average 1.5779816513761469) internal successors, (344), 229 states have internal predecessors, (344), 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) [2022-07-23 05:49:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 344 transitions. [2022-07-23 05:49:40,702 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 344 transitions. Word has length 16 [2022-07-23 05:49:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:40,703 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 344 transitions. [2022-07-23 05:49:40,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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) [2022-07-23 05:49:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 344 transitions. [2022-07-23 05:49:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 05:49:40,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:40,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:40,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:40,917 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,SelfDestructingSolverStorable9 [2022-07-23 05:49:40,917 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:40,918 INFO L85 PathProgramCache]: Analyzing trace with hash 617603772, now seen corresponding path program 1 times [2022-07-23 05:49:40,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:40,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227628722] [2022-07-23 05:49:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:40,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:40,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:40,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227628722] [2022-07-23 05:49:40,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227628722] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:40,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438699381] [2022-07-23 05:49:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:40,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:40,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:40,955 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) [2022-07-23 05:49:40,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 05:49:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:41,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:49:41,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:41,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:41,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438699381] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:41,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:41,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-07-23 05:49:41,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432811857] [2022-07-23 05:49:41,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:41,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:49:41,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:49:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:49:41,092 INFO L87 Difference]: Start difference. First operand 230 states and 344 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:41,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:41,175 INFO L93 Difference]: Finished difference Result 525 states and 738 transitions. [2022-07-23 05:49:41,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:49:41,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-23 05:49:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:41,178 INFO L225 Difference]: With dead ends: 525 [2022-07-23 05:49:41,178 INFO L226 Difference]: Without dead ends: 525 [2022-07-23 05:49:41,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:49:41,179 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 207 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:41,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 528 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:49:41,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-23 05:49:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 323. [2022-07-23 05:49:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 311 states have (on average 1.5305466237942122) internal successors, (476), 322 states have internal predecessors, (476), 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) [2022-07-23 05:49:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 476 transitions. [2022-07-23 05:49:41,187 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 476 transitions. Word has length 16 [2022-07-23 05:49:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:41,188 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 476 transitions. [2022-07-23 05:49:41,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 476 transitions. [2022-07-23 05:49:41,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 05:49:41,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:41,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:41,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:41,417 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,SelfDestructingSolverStorable10 [2022-07-23 05:49:41,417 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:41,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1134377974, now seen corresponding path program 2 times [2022-07-23 05:49:41,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:41,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66593368] [2022-07-23 05:49:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:41,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:49:41,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:41,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66593368] [2022-07-23 05:49:41,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66593368] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:41,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149461245] [2022-07-23 05:49:41,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:49:41,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:41,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:41,466 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) [2022-07-23 05:49:41,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 05:49:41,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:49:41,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:49:41,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 05:49:41,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:41,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:41,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149461245] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:41,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:41,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-07-23 05:49:41,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970988017] [2022-07-23 05:49:41,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:41,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:49:41,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:41,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:49:41,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:49:41,593 INFO L87 Difference]: Start difference. First operand 323 states and 476 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:41,704 INFO L93 Difference]: Finished difference Result 525 states and 726 transitions. [2022-07-23 05:49:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:49:41,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-23 05:49:41,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:41,707 INFO L225 Difference]: With dead ends: 525 [2022-07-23 05:49:41,707 INFO L226 Difference]: Without dead ends: 525 [2022-07-23 05:49:41,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:49:41,708 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 399 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:41,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 420 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:49:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-23 05:49:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 323. [2022-07-23 05:49:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 311 states have (on average 1.4919614147909968) internal successors, (464), 322 states have internal predecessors, (464), 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) [2022-07-23 05:49:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 464 transitions. [2022-07-23 05:49:41,715 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 464 transitions. Word has length 22 [2022-07-23 05:49:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:41,716 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 464 transitions. [2022-07-23 05:49:41,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 464 transitions. [2022-07-23 05:49:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 05:49:41,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:41,717 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:41,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:41,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:41,935 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:41,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1692627395, now seen corresponding path program 1 times [2022-07-23 05:49:41,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:41,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628542742] [2022-07-23 05:49:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:41,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:41,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:41,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628542742] [2022-07-23 05:49:41,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628542742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:41,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343651015] [2022-07-23 05:49:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:41,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:41,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:41,970 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) [2022-07-23 05:49:42,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 05:49:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:42,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 05:49:42,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:42,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:42,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343651015] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:42,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:42,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-07-23 05:49:42,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035290856] [2022-07-23 05:49:42,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:42,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:49:42,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:49:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:49:42,165 INFO L87 Difference]: Start difference. First operand 323 states and 464 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:42,239 INFO L93 Difference]: Finished difference Result 936 states and 1334 transitions. [2022-07-23 05:49:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:49:42,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-23 05:49:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:42,251 INFO L225 Difference]: With dead ends: 936 [2022-07-23 05:49:42,251 INFO L226 Difference]: Without dead ends: 936 [2022-07-23 05:49:42,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:49:42,252 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 177 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:42,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 167 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:49:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-07-23 05:49:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 811. [2022-07-23 05:49:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 799 states have (on average 1.4793491864831039) internal successors, (1182), 810 states have internal predecessors, (1182), 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) [2022-07-23 05:49:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1182 transitions. [2022-07-23 05:49:42,277 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1182 transitions. Word has length 24 [2022-07-23 05:49:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:42,278 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 1182 transitions. [2022-07-23 05:49:42,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1182 transitions. [2022-07-23 05:49:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:49:42,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:42,279 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:42,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:42,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:42,488 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash -6965384, now seen corresponding path program 1 times [2022-07-23 05:49:42,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:42,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096819150] [2022-07-23 05:49:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:42,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:42,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:42,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096819150] [2022-07-23 05:49:42,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096819150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:42,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155717583] [2022-07-23 05:49:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:42,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:42,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:42,537 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) [2022-07-23 05:49:42,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 05:49:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:42,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:49:42,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:42,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:42,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155717583] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:42,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:42,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-23 05:49:42,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439716082] [2022-07-23 05:49:42,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:42,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:49:42,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:49:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:49:42,677 INFO L87 Difference]: Start difference. First operand 811 states and 1182 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:42,816 INFO L93 Difference]: Finished difference Result 2807 states and 3858 transitions. [2022-07-23 05:49:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:49:42,816 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 05:49:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:42,826 INFO L225 Difference]: With dead ends: 2807 [2022-07-23 05:49:42,826 INFO L226 Difference]: Without dead ends: 2807 [2022-07-23 05:49:42,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:49:42,827 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 559 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:42,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 583 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:49:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2022-07-23 05:49:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 1879. [2022-07-23 05:49:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1867 states have (on average 1.432244242099625) internal successors, (2674), 1878 states have internal predecessors, (2674), 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) [2022-07-23 05:49:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 2674 transitions. [2022-07-23 05:49:42,864 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 2674 transitions. Word has length 27 [2022-07-23 05:49:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:42,864 INFO L495 AbstractCegarLoop]: Abstraction has 1879 states and 2674 transitions. [2022-07-23 05:49:42,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 2674 transitions. [2022-07-23 05:49:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:49:42,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:42,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:42,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:43,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-23 05:49:43,072 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 554127938, now seen corresponding path program 1 times [2022-07-23 05:49:43,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:43,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997693570] [2022-07-23 05:49:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:43,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:49:43,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:43,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997693570] [2022-07-23 05:49:43,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997693570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:43,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458528524] [2022-07-23 05:49:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:43,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:43,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:43,130 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) [2022-07-23 05:49:43,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 05:49:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:43,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:49:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:49:43,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:49:43,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458528524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:43,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:43,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-23 05:49:43,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558547205] [2022-07-23 05:49:43,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:43,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:49:43,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:43,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:49:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:49:43,309 INFO L87 Difference]: Start difference. First operand 1879 states and 2674 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:43,381 INFO L93 Difference]: Finished difference Result 1558 states and 2125 transitions. [2022-07-23 05:49:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:49:43,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 05:49:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:43,389 INFO L225 Difference]: With dead ends: 1558 [2022-07-23 05:49:43,389 INFO L226 Difference]: Without dead ends: 1558 [2022-07-23 05:49:43,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:49:43,391 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 376 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:43,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 520 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-07-23 05:49:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 885. [2022-07-23 05:49:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 873 states have (on average 1.404352806414662) internal successors, (1226), 884 states have internal predecessors, (1226), 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) [2022-07-23 05:49:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1226 transitions. [2022-07-23 05:49:43,412 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1226 transitions. Word has length 27 [2022-07-23 05:49:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:43,412 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1226 transitions. [2022-07-23 05:49:43,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1226 transitions. [2022-07-23 05:49:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:49:43,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:43,414 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:43,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:43,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-23 05:49:43,636 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2001409998, now seen corresponding path program 1 times [2022-07-23 05:49:43,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:43,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971486159] [2022-07-23 05:49:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:43,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-23 05:49:43,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:43,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971486159] [2022-07-23 05:49:43,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971486159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:43,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323240843] [2022-07-23 05:49:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:43,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:43,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:43,704 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) [2022-07-23 05:49:43,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 05:49:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:43,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:49:43,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:43,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:49:43,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323240843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:43,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:43,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 13 [2022-07-23 05:49:43,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801320868] [2022-07-23 05:49:43,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:43,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:49:43,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:43,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:49:43,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:49:43,980 INFO L87 Difference]: Start difference. First operand 885 states and 1226 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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) [2022-07-23 05:49:44,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:44,294 INFO L93 Difference]: Finished difference Result 2448 states and 3223 transitions. [2022-07-23 05:49:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:49:44,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-23 05:49:44,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:44,302 INFO L225 Difference]: With dead ends: 2448 [2022-07-23 05:49:44,303 INFO L226 Difference]: Without dead ends: 2448 [2022-07-23 05:49:44,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2022-07-23 05:49:44,304 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1404 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1404 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:44,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1404 Valid, 811 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:49:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2022-07-23 05:49:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 984. [2022-07-23 05:49:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 972 states have (on average 1.4207818930041152) internal successors, (1381), 983 states have internal predecessors, (1381), 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) [2022-07-23 05:49:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1381 transitions. [2022-07-23 05:49:44,332 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1381 transitions. Word has length 51 [2022-07-23 05:49:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:44,332 INFO L495 AbstractCegarLoop]: Abstraction has 984 states and 1381 transitions. [2022-07-23 05:49:44,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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) [2022-07-23 05:49:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1381 transitions. [2022-07-23 05:49:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-23 05:49:44,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:44,339 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:44,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:44,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:44,564 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:44,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1426339750, now seen corresponding path program 1 times [2022-07-23 05:49:44,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:44,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164401847] [2022-07-23 05:49:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:44,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 65 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-23 05:49:44,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:44,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164401847] [2022-07-23 05:49:44,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164401847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:44,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565591502] [2022-07-23 05:49:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:44,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:44,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:44,637 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) [2022-07-23 05:49:44,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 05:49:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:44,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 05:49:44,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-23 05:49:44,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-23 05:49:44,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565591502] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:44,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:49:44,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2022-07-23 05:49:44,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236119957] [2022-07-23 05:49:44,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:44,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:49:44,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:49:44,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:49:44,831 INFO L87 Difference]: Start difference. First operand 984 states and 1381 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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) [2022-07-23 05:49:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:44,927 INFO L93 Difference]: Finished difference Result 2310 states and 3137 transitions. [2022-07-23 05:49:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:49:44,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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 59 [2022-07-23 05:49:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:44,935 INFO L225 Difference]: With dead ends: 2310 [2022-07-23 05:49:44,936 INFO L226 Difference]: Without dead ends: 2310 [2022-07-23 05:49:44,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:49:44,936 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 269 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:44,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 388 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-07-23 05:49:44,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1632. [2022-07-23 05:49:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1620 states have (on average 1.3962962962962964) internal successors, (2262), 1631 states have internal predecessors, (2262), 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) [2022-07-23 05:49:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2262 transitions. [2022-07-23 05:49:44,983 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2262 transitions. Word has length 59 [2022-07-23 05:49:44,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:44,983 INFO L495 AbstractCegarLoop]: Abstraction has 1632 states and 2262 transitions. [2022-07-23 05:49:44,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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) [2022-07-23 05:49:44,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2262 transitions. [2022-07-23 05:49:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-23 05:49:44,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:44,985 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:45,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:45,203 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,SelfDestructingSolverStorable16 [2022-07-23 05:49:45,204 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash -443713253, now seen corresponding path program 1 times [2022-07-23 05:49:45,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:45,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806744417] [2022-07-23 05:49:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:45,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-23 05:49:45,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:45,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806744417] [2022-07-23 05:49:45,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806744417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:45,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454861625] [2022-07-23 05:49:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:45,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:45,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:45,272 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) [2022-07-23 05:49:45,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 05:49:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:45,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 05:49:45,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-23 05:49:45,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-23 05:49:45,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454861625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:45,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:45,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 12 [2022-07-23 05:49:45,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882700976] [2022-07-23 05:49:45,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:45,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:49:45,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:49:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:49:45,470 INFO L87 Difference]: Start difference. First operand 1632 states and 2262 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 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) [2022-07-23 05:49:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:46,580 INFO L93 Difference]: Finished difference Result 9168 states and 12495 transitions. [2022-07-23 05:49:46,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-23 05:49:46,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 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 59 [2022-07-23 05:49:46,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:46,613 INFO L225 Difference]: With dead ends: 9168 [2022-07-23 05:49:46,614 INFO L226 Difference]: Without dead ends: 9168 [2022-07-23 05:49:46,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=631, Invalid=2021, Unknown=0, NotChecked=0, Total=2652 [2022-07-23 05:49:46,615 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 1489 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:46,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 717 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:49:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9168 states. [2022-07-23 05:49:46,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9168 to 4625. [2022-07-23 05:49:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4614 states have (on average 1.4195925444299957) internal successors, (6550), 4624 states have internal predecessors, (6550), 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) [2022-07-23 05:49:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 6550 transitions. [2022-07-23 05:49:46,735 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 6550 transitions. Word has length 59 [2022-07-23 05:49:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:46,736 INFO L495 AbstractCegarLoop]: Abstraction has 4625 states and 6550 transitions. [2022-07-23 05:49:46,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 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) [2022-07-23 05:49:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 6550 transitions. [2022-07-23 05:49:46,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-23 05:49:46,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:46,754 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:46,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:46,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-23 05:49:46,975 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:46,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:46,976 INFO L85 PathProgramCache]: Analyzing trace with hash -791217300, now seen corresponding path program 1 times [2022-07-23 05:49:46,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:46,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147166916] [2022-07-23 05:49:46,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:46,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-23 05:49:47,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:47,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147166916] [2022-07-23 05:49:47,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147166916] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:47,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591550887] [2022-07-23 05:49:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:47,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:47,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:47,043 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) [2022-07-23 05:49:47,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 05:49:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:47,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:49:47,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 101 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 05:49:47,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 103 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 05:49:47,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591550887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:47,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:47,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2022-07-23 05:49:47,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558989818] [2022-07-23 05:49:47,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:47,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:49:47,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:49:47,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:49:47,286 INFO L87 Difference]: Start difference. First operand 4625 states and 6550 transitions. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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) [2022-07-23 05:49:47,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:47,818 INFO L93 Difference]: Finished difference Result 10247 states and 14121 transitions. [2022-07-23 05:49:47,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-23 05:49:47,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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 63 [2022-07-23 05:49:47,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:47,881 INFO L225 Difference]: With dead ends: 10247 [2022-07-23 05:49:47,886 INFO L226 Difference]: Without dead ends: 10247 [2022-07-23 05:49:47,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-07-23 05:49:47,887 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1099 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:47,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1099 Valid, 1379 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:49:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2022-07-23 05:49:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 4425. [2022-07-23 05:49:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4414 states have (on average 1.3948799275033983) internal successors, (6157), 4424 states have internal predecessors, (6157), 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) [2022-07-23 05:49:47,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 6157 transitions. [2022-07-23 05:49:47,985 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 6157 transitions. Word has length 63 [2022-07-23 05:49:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:47,986 INFO L495 AbstractCegarLoop]: Abstraction has 4425 states and 6157 transitions. [2022-07-23 05:49:47,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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) [2022-07-23 05:49:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 6157 transitions. [2022-07-23 05:49:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-23 05:49:47,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:47,988 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:48,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:48,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:48,203 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash 767429099, now seen corresponding path program 1 times [2022-07-23 05:49:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:48,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162933196] [2022-07-23 05:49:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:48,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-23 05:49:48,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:48,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162933196] [2022-07-23 05:49:48,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162933196] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:48,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754528810] [2022-07-23 05:49:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:48,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:48,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:48,265 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) [2022-07-23 05:49:48,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 05:49:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:48,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 05:49:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-23 05:49:48,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-23 05:49:48,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754528810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:48,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:48,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-07-23 05:49:48,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944298740] [2022-07-23 05:49:48,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:48,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:49:48,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:48,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:49:48,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:49:48,530 INFO L87 Difference]: Start difference. First operand 4425 states and 6157 transitions. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:48,805 INFO L93 Difference]: Finished difference Result 3827 states and 5012 transitions. [2022-07-23 05:49:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 05:49:48,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-23 05:49:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:48,812 INFO L225 Difference]: With dead ends: 3827 [2022-07-23 05:49:48,813 INFO L226 Difference]: Without dead ends: 3827 [2022-07-23 05:49:48,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2022-07-23 05:49:48,814 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 612 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:48,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 2060 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:49:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2022-07-23 05:49:48,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 2865. [2022-07-23 05:49:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2854 states have (on average 1.3135949544498948) internal successors, (3749), 2864 states have internal predecessors, (3749), 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) [2022-07-23 05:49:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3749 transitions. [2022-07-23 05:49:48,866 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3749 transitions. Word has length 63 [2022-07-23 05:49:48,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:48,867 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 3749 transitions. [2022-07-23 05:49:48,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3749 transitions. [2022-07-23 05:49:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-23 05:49:48,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:48,868 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:48,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:49,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:49,087 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:49,088 INFO L85 PathProgramCache]: Analyzing trace with hash 965172541, now seen corresponding path program 1 times [2022-07-23 05:49:49,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:49,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190430256] [2022-07-23 05:49:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:49,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-23 05:49:49,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:49,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190430256] [2022-07-23 05:49:49,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190430256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:49,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204165524] [2022-07-23 05:49:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:49,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:49,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:49,132 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) [2022-07-23 05:49:49,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 05:49:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:49,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:49:49,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-23 05:49:49,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-23 05:49:49,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204165524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:49,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:49,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-23 05:49:49,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550685875] [2022-07-23 05:49:49,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:49,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:49:49,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:49,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:49:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:49:49,355 INFO L87 Difference]: Start difference. First operand 2865 states and 3749 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:49,426 INFO L93 Difference]: Finished difference Result 2863 states and 3720 transitions. [2022-07-23 05:49:49,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:49:49,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-23 05:49:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:49,430 INFO L225 Difference]: With dead ends: 2863 [2022-07-23 05:49:49,430 INFO L226 Difference]: Without dead ends: 2863 [2022-07-23 05:49:49,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:49:49,431 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 109 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:49,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 256 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-07-23 05:49:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2854. [2022-07-23 05:49:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2854 states, 2843 states have (on average 1.307069996482589) internal successors, (3716), 2853 states have internal predecessors, (3716), 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) [2022-07-23 05:49:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 3716 transitions. [2022-07-23 05:49:49,465 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 3716 transitions. Word has length 64 [2022-07-23 05:49:49,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:49,465 INFO L495 AbstractCegarLoop]: Abstraction has 2854 states and 3716 transitions. [2022-07-23 05:49:49,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 3716 transitions. [2022-07-23 05:49:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-23 05:49:49,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:49,467 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:49,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:49,679 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,SelfDestructingSolverStorable20 [2022-07-23 05:49:49,679 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:49,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:49,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1737502264, now seen corresponding path program 1 times [2022-07-23 05:49:49,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:49,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449952879] [2022-07-23 05:49:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:49,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-23 05:49:49,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:49,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449952879] [2022-07-23 05:49:49,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449952879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:49,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692642681] [2022-07-23 05:49:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:49,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:49,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:49,767 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) [2022-07-23 05:49:49,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 05:49:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:49,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:49:49,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 95 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-23 05:49:49,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 97 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-23 05:49:50,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692642681] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:50,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:50,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2022-07-23 05:49:50,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718372837] [2022-07-23 05:49:50,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:50,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:49:50,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:50,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:49:50,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:49:50,073 INFO L87 Difference]: Start difference. First operand 2854 states and 3716 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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) [2022-07-23 05:49:50,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:50,356 INFO L93 Difference]: Finished difference Result 3939 states and 5165 transitions. [2022-07-23 05:49:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:49:50,357 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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 65 [2022-07-23 05:49:50,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:50,363 INFO L225 Difference]: With dead ends: 3939 [2022-07-23 05:49:50,363 INFO L226 Difference]: Without dead ends: 3939 [2022-07-23 05:49:50,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:49:50,366 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 366 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:50,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 778 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:49:50,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2022-07-23 05:49:50,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 2136. [2022-07-23 05:49:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2125 states have (on average 1.3035294117647058) internal successors, (2770), 2135 states have internal predecessors, (2770), 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) [2022-07-23 05:49:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 2770 transitions. [2022-07-23 05:49:50,401 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 2770 transitions. Word has length 65 [2022-07-23 05:49:50,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:50,402 INFO L495 AbstractCegarLoop]: Abstraction has 2136 states and 2770 transitions. [2022-07-23 05:49:50,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 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) [2022-07-23 05:49:50,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 2770 transitions. [2022-07-23 05:49:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-23 05:49:50,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:50,403 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:49:50,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:50,619 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,SelfDestructingSolverStorable21 [2022-07-23 05:49:50,619 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:50,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1937207539, now seen corresponding path program 1 times [2022-07-23 05:49:50,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:50,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041929960] [2022-07-23 05:49:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:50,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-23 05:49:50,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:50,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041929960] [2022-07-23 05:49:50,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041929960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:50,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932199394] [2022-07-23 05:49:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:50,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:50,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:50,682 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) [2022-07-23 05:49:50,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 05:49:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:50,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:49:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:50,793 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 [2022-07-23 05:49:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-23 05:49:50,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-23 05:49:51,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932199394] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:51,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:51,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-07-23 05:49:51,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29582704] [2022-07-23 05:49:51,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:51,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:49:51,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:49:51,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:49:51,163 INFO L87 Difference]: Start difference. First operand 2136 states and 2770 transitions. Second operand has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 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) [2022-07-23 05:49:51,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:51,472 INFO L93 Difference]: Finished difference Result 4146 states and 5271 transitions. [2022-07-23 05:49:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:49:51,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 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 69 [2022-07-23 05:49:51,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:51,479 INFO L225 Difference]: With dead ends: 4146 [2022-07-23 05:49:51,479 INFO L226 Difference]: Without dead ends: 4146 [2022-07-23 05:49:51,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:49:51,480 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 517 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:51,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 624 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:49:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2022-07-23 05:49:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 3102. [2022-07-23 05:49:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3091 states have (on average 1.3154318990617924) internal successors, (4066), 3101 states have internal predecessors, (4066), 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) [2022-07-23 05:49:51,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 4066 transitions. [2022-07-23 05:49:51,535 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 4066 transitions. Word has length 69 [2022-07-23 05:49:51,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:51,535 INFO L495 AbstractCegarLoop]: Abstraction has 3102 states and 4066 transitions. [2022-07-23 05:49:51,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 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) [2022-07-23 05:49:51,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 4066 transitions. [2022-07-23 05:49:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-23 05:49:51,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:51,537 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 6, 6, 5, 4, 3, 3, 3, 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] [2022-07-23 05:49:51,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:51,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:51,751 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1779624174, now seen corresponding path program 1 times [2022-07-23 05:49:51,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:51,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206016958] [2022-07-23 05:49:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:51,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-07-23 05:49:51,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:51,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206016958] [2022-07-23 05:49:51,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206016958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:49:51,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:49:51,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:49:51,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458308783] [2022-07-23 05:49:51,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:51,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:49:51,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:51,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:49:51,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:49:51,814 INFO L87 Difference]: Start difference. First operand 3102 states and 4066 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-07-23 05:49:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:51,903 INFO L93 Difference]: Finished difference Result 6805 states and 8699 transitions. [2022-07-23 05:49:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:49:51,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-07-23 05:49:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:51,917 INFO L225 Difference]: With dead ends: 6805 [2022-07-23 05:49:51,917 INFO L226 Difference]: Without dead ends: 6805 [2022-07-23 05:49:51,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:49:51,918 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 192 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:51,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 406 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6805 states. [2022-07-23 05:49:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6805 to 3244. [2022-07-23 05:49:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3233 states have (on average 1.3201360965047944) internal successors, (4268), 3243 states have internal predecessors, (4268), 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) [2022-07-23 05:49:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 4268 transitions. [2022-07-23 05:49:51,981 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 4268 transitions. Word has length 88 [2022-07-23 05:49:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:51,982 INFO L495 AbstractCegarLoop]: Abstraction has 3244 states and 4268 transitions. [2022-07-23 05:49:51,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-07-23 05:49:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 4268 transitions. [2022-07-23 05:49:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-23 05:49:51,984 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:51,984 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 5, 4, 4, 4, 3, 3, 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] [2022-07-23 05:49:51,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-23 05:49:51,985 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:51,986 INFO L85 PathProgramCache]: Analyzing trace with hash -93068261, now seen corresponding path program 1 times [2022-07-23 05:49:51,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:51,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565080440] [2022-07-23 05:49:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:51,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 61 proven. 147 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-23 05:49:52,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:52,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565080440] [2022-07-23 05:49:52,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565080440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:52,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638962042] [2022-07-23 05:49:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:52,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:52,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:52,081 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) [2022-07-23 05:49:52,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-23 05:49:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:52,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:49:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-07-23 05:49:52,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:49:52,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638962042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:49:52,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:49:52,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-07-23 05:49:52,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969393174] [2022-07-23 05:49:52,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:49:52,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:49:52,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:52,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:49:52,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:49:52,284 INFO L87 Difference]: Start difference. First operand 3244 states and 4268 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:52,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:52,306 INFO L93 Difference]: Finished difference Result 3609 states and 4617 transitions. [2022-07-23 05:49:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:49:52,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-07-23 05:49:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:52,311 INFO L225 Difference]: With dead ends: 3609 [2022-07-23 05:49:52,312 INFO L226 Difference]: Without dead ends: 3609 [2022-07-23 05:49:52,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:49:52,313 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 54 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:52,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:49:52,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2022-07-23 05:49:52,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3280. [2022-07-23 05:49:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3269 states have (on average 1.2970327317222392) internal successors, (4240), 3279 states have internal predecessors, (4240), 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) [2022-07-23 05:49:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4240 transitions. [2022-07-23 05:49:52,354 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4240 transitions. Word has length 96 [2022-07-23 05:49:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:52,354 INFO L495 AbstractCegarLoop]: Abstraction has 3280 states and 4240 transitions. [2022-07-23 05:49:52,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4240 transitions. [2022-07-23 05:49:52,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-23 05:49:52,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:52,356 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 5, 4, 4, 4, 3, 3, 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] [2022-07-23 05:49:52,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:52,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:52,571 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:52,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:52,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1826247984, now seen corresponding path program 1 times [2022-07-23 05:49:52,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:52,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759312093] [2022-07-23 05:49:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:52,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 79 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-07-23 05:49:52,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:52,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759312093] [2022-07-23 05:49:52,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759312093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:52,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815498109] [2022-07-23 05:49:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:52,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:52,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:52,632 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) [2022-07-23 05:49:52,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-23 05:49:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:52,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 05:49:52,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-23 05:49:52,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-23 05:49:52,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815498109] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:52,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:52,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-07-23 05:49:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011360625] [2022-07-23 05:49:52,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:52,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:49:52,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:49:52,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:49:52,973 INFO L87 Difference]: Start difference. First operand 3280 states and 4240 transitions. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 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) [2022-07-23 05:49:53,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:53,222 INFO L93 Difference]: Finished difference Result 3904 states and 4668 transitions. [2022-07-23 05:49:53,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:49:53,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 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 98 [2022-07-23 05:49:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:53,229 INFO L225 Difference]: With dead ends: 3904 [2022-07-23 05:49:53,229 INFO L226 Difference]: Without dead ends: 3904 [2022-07-23 05:49:53,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:49:53,230 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 733 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:53,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 2344 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:49:53,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2022-07-23 05:49:53,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 2228. [2022-07-23 05:49:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2218 states have (on average 1.21190261496844) internal successors, (2688), 2227 states have internal predecessors, (2688), 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) [2022-07-23 05:49:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2688 transitions. [2022-07-23 05:49:53,261 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2688 transitions. Word has length 98 [2022-07-23 05:49:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:53,261 INFO L495 AbstractCegarLoop]: Abstraction has 2228 states and 2688 transitions. [2022-07-23 05:49:53,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 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) [2022-07-23 05:49:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2688 transitions. [2022-07-23 05:49:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-23 05:49:53,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:53,266 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2022-07-23 05:49:53,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:53,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-23 05:49:53,492 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:53,492 INFO L85 PathProgramCache]: Analyzing trace with hash -932844676, now seen corresponding path program 1 times [2022-07-23 05:49:53,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:53,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48984277] [2022-07-23 05:49:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:53,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:53,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:53,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48984277] [2022-07-23 05:49:53,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48984277] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:53,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314100256] [2022-07-23 05:49:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:53,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:53,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:53,559 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:49:53,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-23 05:49:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:53,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:49:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:53,703 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 [2022-07-23 05:49:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:53,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:53,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314100256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:53,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:53,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-23 05:49:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005851797] [2022-07-23 05:49:53,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:53,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:49:53,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:49:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:49:53,932 INFO L87 Difference]: Start difference. First operand 2228 states and 2688 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 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) [2022-07-23 05:49:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:54,154 INFO L93 Difference]: Finished difference Result 3146 states and 3743 transitions. [2022-07-23 05:49:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:49:54,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 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 111 [2022-07-23 05:49:54,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:54,159 INFO L225 Difference]: With dead ends: 3146 [2022-07-23 05:49:54,159 INFO L226 Difference]: Without dead ends: 3146 [2022-07-23 05:49:54,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:49:54,160 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 322 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:54,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 409 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:49:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-07-23 05:49:54,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2229. [2022-07-23 05:49:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2220 states have (on average 1.212162162162162) internal successors, (2691), 2228 states have internal predecessors, (2691), 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) [2022-07-23 05:49:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 2691 transitions. [2022-07-23 05:49:54,184 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 2691 transitions. Word has length 111 [2022-07-23 05:49:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:54,185 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 2691 transitions. [2022-07-23 05:49:54,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 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) [2022-07-23 05:49:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 2691 transitions. [2022-07-23 05:49:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-23 05:49:54,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:54,187 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2022-07-23 05:49:54,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:54,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-23 05:49:54,416 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash -932844675, now seen corresponding path program 1 times [2022-07-23 05:49:54,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:54,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325657101] [2022-07-23 05:49:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:54,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:54,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325657101] [2022-07-23 05:49:54,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325657101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:54,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517519664] [2022-07-23 05:49:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:54,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:54,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:54,512 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:49:54,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-23 05:49:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:54,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 05:49:54,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:55,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:55,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517519664] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:55,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:55,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 16 [2022-07-23 05:49:55,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89245522] [2022-07-23 05:49:55,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:55,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 05:49:55,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:55,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 05:49:55,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:49:55,371 INFO L87 Difference]: Start difference. First operand 2229 states and 2691 transitions. Second operand has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 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) [2022-07-23 05:49:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:56,088 INFO L93 Difference]: Finished difference Result 6465 states and 7732 transitions. [2022-07-23 05:49:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:49:56,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 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 111 [2022-07-23 05:49:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:56,097 INFO L225 Difference]: With dead ends: 6465 [2022-07-23 05:49:56,098 INFO L226 Difference]: Without dead ends: 6465 [2022-07-23 05:49:56,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2022-07-23 05:49:56,099 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1121 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:56,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 1168 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:49:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2022-07-23 05:49:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 2385. [2022-07-23 05:49:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2376 states have (on average 1.2175925925925926) internal successors, (2893), 2384 states have internal predecessors, (2893), 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) [2022-07-23 05:49:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 2893 transitions. [2022-07-23 05:49:56,156 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 2893 transitions. Word has length 111 [2022-07-23 05:49:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:56,157 INFO L495 AbstractCegarLoop]: Abstraction has 2385 states and 2893 transitions. [2022-07-23 05:49:56,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 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) [2022-07-23 05:49:56,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 2893 transitions. [2022-07-23 05:49:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-23 05:49:56,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:56,159 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2022-07-23 05:49:56,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:56,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-23 05:49:56,367 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1146584722, now seen corresponding path program 1 times [2022-07-23 05:49:56,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:56,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974049431] [2022-07-23 05:49:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:56,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 28 proven. 213 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-23 05:49:56,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:56,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974049431] [2022-07-23 05:49:56,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974049431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:56,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297935462] [2022-07-23 05:49:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:56,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:56,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:56,478 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:49:56,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-23 05:49:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:56,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 05:49:56,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:56,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:56,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297935462] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:56,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:56,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2022-07-23 05:49:56,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564774529] [2022-07-23 05:49:56,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:56,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:49:56,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:56,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:49:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:49:56,810 INFO L87 Difference]: Start difference. First operand 2385 states and 2893 transitions. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 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) [2022-07-23 05:49:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:57,527 INFO L93 Difference]: Finished difference Result 5270 states and 6298 transitions. [2022-07-23 05:49:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-23 05:49:57,528 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 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 112 [2022-07-23 05:49:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:57,534 INFO L225 Difference]: With dead ends: 5270 [2022-07-23 05:49:57,534 INFO L226 Difference]: Without dead ends: 5270 [2022-07-23 05:49:57,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=512, Invalid=1468, Unknown=0, NotChecked=0, Total=1980 [2022-07-23 05:49:57,535 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 602 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:57,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1267 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:49:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2022-07-23 05:49:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 2385. [2022-07-23 05:49:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2376 states have (on average 1.2146464646464648) internal successors, (2886), 2384 states have internal predecessors, (2886), 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) [2022-07-23 05:49:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 2886 transitions. [2022-07-23 05:49:57,569 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 2886 transitions. Word has length 112 [2022-07-23 05:49:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:57,569 INFO L495 AbstractCegarLoop]: Abstraction has 2385 states and 2886 transitions. [2022-07-23 05:49:57,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 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) [2022-07-23 05:49:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 2886 transitions. [2022-07-23 05:49:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-23 05:49:57,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:57,572 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2022-07-23 05:49:57,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:57,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-23 05:49:57,790 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:57,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1937224330, now seen corresponding path program 1 times [2022-07-23 05:49:57,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:57,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267030504] [2022-07-23 05:49:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:57,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:57,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:57,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267030504] [2022-07-23 05:49:57,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267030504] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:57,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618166437] [2022-07-23 05:49:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:57,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:57,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:57,894 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:49:57,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-23 05:49:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:49:58,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:58,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:58,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618166437] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:58,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:58,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-23 05:49:58,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435013611] [2022-07-23 05:49:58,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:58,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:49:58,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:58,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:49:58,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:49:58,302 INFO L87 Difference]: Start difference. First operand 2385 states and 2886 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:58,497 INFO L93 Difference]: Finished difference Result 4569 states and 5488 transitions. [2022-07-23 05:49:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:49:58,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-07-23 05:49:58,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:58,502 INFO L225 Difference]: With dead ends: 4569 [2022-07-23 05:49:58,502 INFO L226 Difference]: Without dead ends: 4569 [2022-07-23 05:49:58,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:49:58,503 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 510 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:58,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 266 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:49:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2022-07-23 05:49:58,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 2386. [2022-07-23 05:49:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2377 states have (on average 1.2145561632309634) internal successors, (2887), 2385 states have internal predecessors, (2887), 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) [2022-07-23 05:49:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 2887 transitions. [2022-07-23 05:49:58,536 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 2887 transitions. Word has length 114 [2022-07-23 05:49:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:58,536 INFO L495 AbstractCegarLoop]: Abstraction has 2386 states and 2887 transitions. [2022-07-23 05:49:58,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:49:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 2887 transitions. [2022-07-23 05:49:58,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-23 05:49:58,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:58,539 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2022-07-23 05:49:58,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-23 05:49:58,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:58,752 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:49:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:58,753 INFO L85 PathProgramCache]: Analyzing trace with hash -374280255, now seen corresponding path program 1 times [2022-07-23 05:49:58,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:58,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886141377] [2022-07-23 05:49:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:58,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:59,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:59,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886141377] [2022-07-23 05:49:59,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886141377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:59,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130398879] [2022-07-23 05:49:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:59,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:59,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:59,006 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:49:59,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-23 05:49:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:59,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-23 05:49:59,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:59,640 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 11 treesize of output 7 [2022-07-23 05:49:59,645 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 11 treesize of output 7 [2022-07-23 05:49:59,701 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:49:59,701 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2022-07-23 05:49:59,712 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:49:59,713 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-23 05:49:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:49:59,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:59,866 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 12 treesize of output 10 [2022-07-23 05:49:59,870 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 22 treesize of output 20 [2022-07-23 05:49:59,888 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 12 treesize of output 10 [2022-07-23 05:49:59,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:49:59,895 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 12 treesize of output 10 [2022-07-23 05:49:59,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:50:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:50:00,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130398879] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:00,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:50:00,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-07-23 05:50:00,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144930115] [2022-07-23 05:50:00,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:00,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 05:50:00,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:50:00,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 05:50:00,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:50:00,425 INFO L87 Difference]: Start difference. First operand 2386 states and 2887 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 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) [2022-07-23 05:50:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:00,821 INFO L93 Difference]: Finished difference Result 4635 states and 5548 transitions. [2022-07-23 05:50:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 05:50:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 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 117 [2022-07-23 05:50:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:00,826 INFO L225 Difference]: With dead ends: 4635 [2022-07-23 05:50:00,826 INFO L226 Difference]: Without dead ends: 4635 [2022-07-23 05:50:00,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 222 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-07-23 05:50:00,827 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 255 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:00,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 834 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:50:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2022-07-23 05:50:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 2950. [2022-07-23 05:50:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2941 states have (on average 1.2142128527711662) internal successors, (3571), 2949 states have internal predecessors, (3571), 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) [2022-07-23 05:50:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 3571 transitions. [2022-07-23 05:50:00,863 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 3571 transitions. Word has length 117 [2022-07-23 05:50:00,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:00,863 INFO L495 AbstractCegarLoop]: Abstraction has 2950 states and 3571 transitions. [2022-07-23 05:50:00,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 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) [2022-07-23 05:50:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 3571 transitions. [2022-07-23 05:50:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-23 05:50:00,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:00,866 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 8, 7, 6, 5, 5, 4, 4, 3, 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] [2022-07-23 05:50:00,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:01,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:01,083 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:50:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash 779532359, now seen corresponding path program 1 times [2022-07-23 05:50:01,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:50:01,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030038264] [2022-07-23 05:50:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:01,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:50:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 84 proven. 313 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 05:50:01,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:50:01,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030038264] [2022-07-23 05:50:01,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030038264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:50:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407441516] [2022-07-23 05:50:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:01,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:01,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:50:01,295 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:50:01,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-23 05:50:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-23 05:50:01,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:01,529 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 13 treesize of output 9 [2022-07-23 05:50:01,532 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 13 treesize of output 9 [2022-07-23 05:50:01,688 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:01,688 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-23 05:50:01,695 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:01,696 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-23 05:50:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 80 proven. 317 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 05:50:01,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:02,498 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 14 treesize of output 12 [2022-07-23 05:50:02,501 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 28 treesize of output 24 [2022-07-23 05:50:02,512 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 14 treesize of output 12 [2022-07-23 05:50:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:50:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 76 proven. 321 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 05:50:02,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407441516] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:02,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:50:02,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-23 05:50:02,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946593252] [2022-07-23 05:50:02,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:02,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-23 05:50:02,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:50:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-23 05:50:02,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-07-23 05:50:02,748 INFO L87 Difference]: Start difference. First operand 2950 states and 3571 transitions. Second operand has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 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) [2022-07-23 05:50:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:05,006 INFO L93 Difference]: Finished difference Result 15206 states and 17825 transitions. [2022-07-23 05:50:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-23 05:50:05,006 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 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 117 [2022-07-23 05:50:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:05,019 INFO L225 Difference]: With dead ends: 15206 [2022-07-23 05:50:05,019 INFO L226 Difference]: Without dead ends: 15206 [2022-07-23 05:50:05,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1155, Invalid=6155, Unknown=0, NotChecked=0, Total=7310 [2022-07-23 05:50:05,022 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 2151 mSDsluCounter, 2501 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2151 SdHoareTripleChecker+Valid, 2679 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:05,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2151 Valid, 2679 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 1046 Invalid, 0 Unknown, 132 Unchecked, 0.8s Time] [2022-07-23 05:50:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15206 states. [2022-07-23 05:50:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15206 to 8278. [2022-07-23 05:50:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8278 states, 8269 states have (on average 1.207159269561011) internal successors, (9982), 8277 states have internal predecessors, (9982), 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) [2022-07-23 05:50:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8278 states to 8278 states and 9982 transitions. [2022-07-23 05:50:05,151 INFO L78 Accepts]: Start accepts. Automaton has 8278 states and 9982 transitions. Word has length 117 [2022-07-23 05:50:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:05,152 INFO L495 AbstractCegarLoop]: Abstraction has 8278 states and 9982 transitions. [2022-07-23 05:50:05,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 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) [2022-07-23 05:50:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 8278 states and 9982 transitions. [2022-07-23 05:50:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-23 05:50:05,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:05,155 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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] [2022-07-23 05:50:05,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:05,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:05,371 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:50:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:05,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1282212589, now seen corresponding path program 1 times [2022-07-23 05:50:05,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:50:05,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850647084] [2022-07-23 05:50:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:05,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:50:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:50:05,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:50:05,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850647084] [2022-07-23 05:50:05,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850647084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:50:05,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110579704] [2022-07-23 05:50:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:05,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:05,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:50:05,540 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:50:05,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-23 05:50:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:05,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 05:50:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:05,815 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 [2022-07-23 05:50:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:50:05,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-23 05:50:05,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110579704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:05,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:50:05,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 8 [2022-07-23 05:50:05,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320036171] [2022-07-23 05:50:05,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:05,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:50:05,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:50:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:50:05,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:50:05,989 INFO L87 Difference]: Start difference. First operand 8278 states and 9982 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 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) [2022-07-23 05:50:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:06,295 INFO L93 Difference]: Finished difference Result 18955 states and 22785 transitions. [2022-07-23 05:50:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:50:06,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 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 118 [2022-07-23 05:50:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:06,321 INFO L225 Difference]: With dead ends: 18955 [2022-07-23 05:50:06,321 INFO L226 Difference]: Without dead ends: 18937 [2022-07-23 05:50:06,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:50:06,322 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 393 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:06,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 899 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 237 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-07-23 05:50:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18937 states. [2022-07-23 05:50:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18937 to 14041. [2022-07-23 05:50:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14041 states, 14032 states have (on average 1.206171607753706) internal successors, (16925), 14040 states have internal predecessors, (16925), 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) [2022-07-23 05:50:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14041 states to 14041 states and 16925 transitions. [2022-07-23 05:50:06,494 INFO L78 Accepts]: Start accepts. Automaton has 14041 states and 16925 transitions. Word has length 118 [2022-07-23 05:50:06,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:06,495 INFO L495 AbstractCegarLoop]: Abstraction has 14041 states and 16925 transitions. [2022-07-23 05:50:06,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 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) [2022-07-23 05:50:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 14041 states and 16925 transitions. [2022-07-23 05:50:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-23 05:50:06,504 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:06,505 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 8, 8, 8, 7, 7, 6, 6, 4, 4, 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] [2022-07-23 05:50:06,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:06,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:06,727 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:50:06,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash -224880734, now seen corresponding path program 1 times [2022-07-23 05:50:06,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:50:06,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263406507] [2022-07-23 05:50:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:06,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:50:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 335 proven. 4 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-07-23 05:50:06,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:50:06,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263406507] [2022-07-23 05:50:06,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263406507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:50:06,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621726651] [2022-07-23 05:50:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:06,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:06,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:50:06,796 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:50:06,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-23 05:50:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:06,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 05:50:06,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 335 proven. 4 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-07-23 05:50:07,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-07-23 05:50:07,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621726651] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-23 05:50:07,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:50:07,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 9 [2022-07-23 05:50:07,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743264063] [2022-07-23 05:50:07,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:50:07,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:50:07,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:50:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:50:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:50:07,053 INFO L87 Difference]: Start difference. First operand 14041 states and 16925 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:50:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:07,123 INFO L93 Difference]: Finished difference Result 10162 states and 12168 transitions. [2022-07-23 05:50:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:50:07,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2022-07-23 05:50:07,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:07,135 INFO L225 Difference]: With dead ends: 10162 [2022-07-23 05:50:07,135 INFO L226 Difference]: Without dead ends: 10162 [2022-07-23 05:50:07,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:50:07,136 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 179 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:07,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 314 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:50:07,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10162 states. [2022-07-23 05:50:07,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10162 to 8827. [2022-07-23 05:50:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8827 states, 8818 states have (on average 1.1958493989566794) internal successors, (10545), 8826 states have internal predecessors, (10545), 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) [2022-07-23 05:50:07,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8827 states to 8827 states and 10545 transitions. [2022-07-23 05:50:07,229 INFO L78 Accepts]: Start accepts. Automaton has 8827 states and 10545 transitions. Word has length 146 [2022-07-23 05:50:07,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:07,229 INFO L495 AbstractCegarLoop]: Abstraction has 8827 states and 10545 transitions. [2022-07-23 05:50:07,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:50:07,230 INFO L276 IsEmpty]: Start isEmpty. Operand 8827 states and 10545 transitions. [2022-07-23 05:50:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-23 05:50:07,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:07,237 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 14, 9, 9, 7, 6, 6, 5, 5, 4, 3, 3, 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] [2022-07-23 05:50:07,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:07,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:07,450 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:50:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:07,451 INFO L85 PathProgramCache]: Analyzing trace with hash 368256012, now seen corresponding path program 2 times [2022-07-23 05:50:07,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:50:07,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767974133] [2022-07-23 05:50:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:07,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:50:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 336 proven. 3 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-23 05:50:07,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:50:07,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767974133] [2022-07-23 05:50:07,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767974133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:50:07,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558477595] [2022-07-23 05:50:07,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:50:07,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:07,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:50:07,548 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:50:07,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-23 05:50:07,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:50:07,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:50:07,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 05:50:07,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 291 proven. 109 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-23 05:50:07,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 291 proven. 109 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-23 05:50:07,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558477595] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:07,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:50:07,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-23 05:50:07,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207606770] [2022-07-23 05:50:07,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:07,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:50:07,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:50:07,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:50:07,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:50:07,992 INFO L87 Difference]: Start difference. First operand 8827 states and 10545 transitions. Second operand has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:50:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:08,194 INFO L93 Difference]: Finished difference Result 10609 states and 12209 transitions. [2022-07-23 05:50:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 05:50:08,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-07-23 05:50:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:08,206 INFO L225 Difference]: With dead ends: 10609 [2022-07-23 05:50:08,206 INFO L226 Difference]: Without dead ends: 10609 [2022-07-23 05:50:08,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 311 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-07-23 05:50:08,207 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 848 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:08,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 1784 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:50:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10609 states. [2022-07-23 05:50:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10609 to 7447. [2022-07-23 05:50:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7447 states, 7438 states have (on average 1.1560903468674375) internal successors, (8599), 7446 states have internal predecessors, (8599), 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) [2022-07-23 05:50:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7447 states to 7447 states and 8599 transitions. [2022-07-23 05:50:08,341 INFO L78 Accepts]: Start accepts. Automaton has 7447 states and 8599 transitions. Word has length 155 [2022-07-23 05:50:08,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:08,341 INFO L495 AbstractCegarLoop]: Abstraction has 7447 states and 8599 transitions. [2022-07-23 05:50:08,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:50:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 7447 states and 8599 transitions. [2022-07-23 05:50:08,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-23 05:50:08,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:08,347 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 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] [2022-07-23 05:50:08,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:08,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-23 05:50:08,571 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:50:08,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1761139834, now seen corresponding path program 1 times [2022-07-23 05:50:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:50:08,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407592709] [2022-07-23 05:50:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:08,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:50:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 679 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-23 05:50:08,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:50:08,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407592709] [2022-07-23 05:50:08,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407592709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:50:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835074472] [2022-07-23 05:50:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:08,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:08,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:50:08,864 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:50:08,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-23 05:50:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:09,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-23 05:50:09,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:09,047 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 [2022-07-23 05:50:09,214 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 13 treesize of output 9 [2022-07-23 05:50:09,219 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 13 treesize of output 9 [2022-07-23 05:50:09,373 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:50:09,373 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 [2022-07-23 05:50:09,381 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 14 treesize of output 16 [2022-07-23 05:50:09,388 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 14 treesize of output 16 [2022-07-23 05:50:09,397 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 14 treesize of output 16 [2022-07-23 05:50:09,401 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 14 treesize of output 16 [2022-07-23 05:50:09,453 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 14 treesize of output 16 [2022-07-23 05:50:09,459 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 14 treesize of output 16 [2022-07-23 05:50:09,580 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 14 treesize of output 16 [2022-07-23 05:50:09,584 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 14 treesize of output 16 [2022-07-23 05:50:09,690 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 15 treesize of output 7 [2022-07-23 05:50:09,693 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 15 treesize of output 7 [2022-07-23 05:50:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 100 proven. 673 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-23 05:50:09,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:10,002 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1343 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1343) c_~S~0.base) (+ c_~S~0.offset 4)) 0)) (forall ((v_ArrVal_1342 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1342) c_~S~0.base) (+ c_~S~0.offset 4)) 0))) is different from false [2022-07-23 05:50:10,890 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:10,891 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-07-23 05:50:10,894 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 36 treesize of output 24 [2022-07-23 05:50:10,897 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 11 treesize of output 7 [2022-07-23 05:50:10,908 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:10,909 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-07-23 05:50:10,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:50:10,912 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 20 treesize of output 8 [2022-07-23 05:50:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 90 proven. 443 refuted. 0 times theorem prover too weak. 56 trivial. 240 not checked. [2022-07-23 05:50:11,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835074472] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:11,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:50:11,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2022-07-23 05:50:11,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114279348] [2022-07-23 05:50:11,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:11,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:50:11,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:50:11,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:50:11,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=447, Unknown=2, NotChecked=42, Total=552 [2022-07-23 05:50:11,237 INFO L87 Difference]: Start difference. First operand 7447 states and 8599 transitions. Second operand has 24 states, 24 states have (on average 9.625) internal successors, (231), 23 states have internal predecessors, (231), 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) [2022-07-23 05:50:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:12,637 INFO L93 Difference]: Finished difference Result 22433 states and 25495 transitions. [2022-07-23 05:50:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-23 05:50:12,638 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 9.625) internal successors, (231), 23 states have internal predecessors, (231), 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 162 [2022-07-23 05:50:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:12,664 INFO L225 Difference]: With dead ends: 22433 [2022-07-23 05:50:12,664 INFO L226 Difference]: Without dead ends: 22433 [2022-07-23 05:50:12,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 329 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=419, Invalid=2234, Unknown=3, NotChecked=100, Total=2756 [2022-07-23 05:50:12,666 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 1245 mSDsluCounter, 2898 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 3159 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 712 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:12,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1245 Valid, 3159 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 868 Invalid, 0 Unknown, 712 Unchecked, 0.5s Time] [2022-07-23 05:50:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22433 states. [2022-07-23 05:50:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22433 to 11688. [2022-07-23 05:50:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11688 states, 11679 states have (on average 1.149242229642949) internal successors, (13422), 11687 states have internal predecessors, (13422), 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) [2022-07-23 05:50:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11688 states to 11688 states and 13422 transitions. [2022-07-23 05:50:12,845 INFO L78 Accepts]: Start accepts. Automaton has 11688 states and 13422 transitions. Word has length 162 [2022-07-23 05:50:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:12,845 INFO L495 AbstractCegarLoop]: Abstraction has 11688 states and 13422 transitions. [2022-07-23 05:50:12,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.625) internal successors, (231), 23 states have internal predecessors, (231), 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) [2022-07-23 05:50:12,845 INFO L276 IsEmpty]: Start isEmpty. Operand 11688 states and 13422 transitions. [2022-07-23 05:50:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-23 05:50:12,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:12,853 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 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] [2022-07-23 05:50:12,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:13,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-23 05:50:13,067 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:50:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:13,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1850586310, now seen corresponding path program 2 times [2022-07-23 05:50:13,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:50:13,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717194932] [2022-07-23 05:50:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:13,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:50:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 685 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-23 05:50:13,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:50:13,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717194932] [2022-07-23 05:50:13,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717194932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:50:13,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560219239] [2022-07-23 05:50:13,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:50:13,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:13,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:50:13,412 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:50:13,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-23 05:50:13,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:50:13,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:50:13,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-23 05:50:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:13,644 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 [2022-07-23 05:50:13,775 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 13 treesize of output 9 [2022-07-23 05:50:13,780 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 13 treesize of output 9 [2022-07-23 05:50:13,949 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:50:13,949 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 [2022-07-23 05:50:13,955 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 14 treesize of output 16 [2022-07-23 05:50:13,962 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 14 treesize of output 16 [2022-07-23 05:50:13,968 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 14 treesize of output 16 [2022-07-23 05:50:13,974 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 14 treesize of output 16 [2022-07-23 05:50:14,015 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 14 treesize of output 16 [2022-07-23 05:50:14,021 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 14 treesize of output 16 [2022-07-23 05:50:14,156 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 16 treesize of output 18 [2022-07-23 05:50:14,160 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 16 treesize of output 18 [2022-07-23 05:50:14,225 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 15 treesize of output 7 [2022-07-23 05:50:14,227 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 15 treesize of output 7 [2022-07-23 05:50:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 100 proven. 679 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-23 05:50:14,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:14,528 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~t4~0.base) (+ c_~t4~0.offset 4)) 0)) (forall ((v_ArrVal_1472 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~t4~0.base) (+ c_~t4~0.offset 4)) 0))) is different from false [2022-07-23 05:50:14,565 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~S~0.base) (+ c_~S~0.offset 4)) 0)) (forall ((v_ArrVal_1472 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~S~0.base) (+ c_~S~0.offset 4))))) is different from false [2022-07-23 05:50:15,266 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:15,266 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-07-23 05:50:15,268 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 36 treesize of output 24 [2022-07-23 05:50:15,271 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 11 treesize of output 7 [2022-07-23 05:50:15,280 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:15,281 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-07-23 05:50:15,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:50:15,285 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 20 treesize of output 8 [2022-07-23 05:50:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 90 proven. 381 refuted. 0 times theorem prover too weak. 50 trivial. 308 not checked. [2022-07-23 05:50:15,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560219239] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:15,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:50:15,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2022-07-23 05:50:15,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29906422] [2022-07-23 05:50:15,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:15,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:50:15,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:50:15,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:50:15,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=409, Unknown=3, NotChecked=82, Total=552 [2022-07-23 05:50:15,578 INFO L87 Difference]: Start difference. First operand 11688 states and 13422 transitions. Second operand has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 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) [2022-07-23 05:50:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:17,513 INFO L93 Difference]: Finished difference Result 37723 states and 42916 transitions. [2022-07-23 05:50:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-23 05:50:17,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 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 162 [2022-07-23 05:50:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:17,546 INFO L225 Difference]: With dead ends: 37723 [2022-07-23 05:50:17,546 INFO L226 Difference]: Without dead ends: 37723 [2022-07-23 05:50:17,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 318 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=711, Invalid=4837, Unknown=10, NotChecked=294, Total=5852 [2022-07-23 05:50:17,547 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 1646 mSDsluCounter, 3770 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 4082 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1218 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:17,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1646 Valid, 4082 Invalid, 2477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1050 Invalid, 0 Unknown, 1218 Unchecked, 0.6s Time] [2022-07-23 05:50:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37723 states. [2022-07-23 05:50:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37723 to 20281. [2022-07-23 05:50:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20281 states, 20272 states have (on average 1.1429064719810575) internal successors, (23169), 20280 states have internal predecessors, (23169), 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) [2022-07-23 05:50:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20281 states to 20281 states and 23169 transitions. [2022-07-23 05:50:17,789 INFO L78 Accepts]: Start accepts. Automaton has 20281 states and 23169 transitions. Word has length 162 [2022-07-23 05:50:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:17,789 INFO L495 AbstractCegarLoop]: Abstraction has 20281 states and 23169 transitions. [2022-07-23 05:50:17,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 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) [2022-07-23 05:50:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 20281 states and 23169 transitions. [2022-07-23 05:50:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-23 05:50:17,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:17,801 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 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] [2022-07-23 05:50:17,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-23 05:50:18,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-23 05:50:18,007 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:50:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:18,008 INFO L85 PathProgramCache]: Analyzing trace with hash -464820282, now seen corresponding path program 3 times [2022-07-23 05:50:18,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:50:18,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238588188] [2022-07-23 05:50:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:18,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:50:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-23 05:50:18,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:50:18,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238588188] [2022-07-23 05:50:18,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238588188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:50:18,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366184942] [2022-07-23 05:50:18,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:50:18,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:18,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:50:18,359 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:50:18,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-23 05:50:18,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-23 05:50:18,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:50:18,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-23 05:50:18,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:18,651 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 [2022-07-23 05:50:18,797 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 13 treesize of output 9 [2022-07-23 05:50:18,805 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 13 treesize of output 9 [2022-07-23 05:50:19,020 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:50:19,020 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 [2022-07-23 05:50:19,046 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 14 treesize of output 16 [2022-07-23 05:50:19,050 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 14 treesize of output 16 [2022-07-23 05:50:19,076 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 14 treesize of output 16 [2022-07-23 05:50:19,081 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 14 treesize of output 16 [2022-07-23 05:50:19,123 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 14 treesize of output 16 [2022-07-23 05:50:19,130 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 14 treesize of output 16 [2022-07-23 05:50:19,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-23 05:50:19,286 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 14 treesize of output 16 [2022-07-23 05:50:19,369 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:19,370 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-07-23 05:50:19,380 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:19,381 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-07-23 05:50:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 153 proven. 623 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-23 05:50:19,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:20,181 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1603 (Array Int Int)) (~t4~0.offset Int)) (or (not (<= 0 ~t4~0.offset)) (not (<= ~t4~0.offset c_~S~0.offset)) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1603) c_~S~0.base) (+ ~t4~0.offset 4)) 0))) (forall ((v_ArrVal_1601 (Array Int Int)) (~t4~0.offset Int)) (or (not (<= 0 ~t4~0.offset)) (not (<= ~t4~0.offset c_~S~0.offset)) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1601) c_~S~0.base) (+ ~t4~0.offset 4)) 0)))) is different from false [2022-07-23 05:50:21,447 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:21,447 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-07-23 05:50:21,454 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:21,454 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-07-23 05:50:21,459 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 11 treesize of output 7 [2022-07-23 05:50:21,490 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:21,490 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-07-23 05:50:21,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:50:21,500 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:21,500 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-23 05:50:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 96 proven. 371 refuted. 0 times theorem prover too weak. 72 trivial. 290 not checked. [2022-07-23 05:50:22,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366184942] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:22,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:50:22,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 32 [2022-07-23 05:50:22,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457520277] [2022-07-23 05:50:22,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:22,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 05:50:22,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:50:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 05:50:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=886, Unknown=1, NotChecked=60, Total=1056 [2022-07-23 05:50:22,006 INFO L87 Difference]: Start difference. First operand 20281 states and 23169 transitions. Second operand has 33 states, 33 states have (on average 9.575757575757576) internal successors, (316), 32 states have internal predecessors, (316), 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) [2022-07-23 05:50:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:40,541 INFO L93 Difference]: Finished difference Result 125576 states and 142278 transitions. [2022-07-23 05:50:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 287 states. [2022-07-23 05:50:40,542 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 9.575757575757576) internal successors, (316), 32 states have internal predecessors, (316), 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 162 [2022-07-23 05:50:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:40,709 INFO L225 Difference]: With dead ends: 125576 [2022-07-23 05:50:40,709 INFO L226 Difference]: Without dead ends: 125576 [2022-07-23 05:50:40,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 450 SyntacticMatches, 78 SemanticMatches, 306 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 50903 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=9062, Invalid=84882, Unknown=2, NotChecked=610, Total=94556 [2022-07-23 05:50:40,719 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 4498 mSDsluCounter, 10264 mSDsCounter, 0 mSdLazyCounter, 3701 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4498 SdHoareTripleChecker+Valid, 10912 SdHoareTripleChecker+Invalid, 6594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 3701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2311 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:40,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4498 Valid, 10912 Invalid, 6594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 3701 Invalid, 0 Unknown, 2311 Unchecked, 2.3s Time] [2022-07-23 05:50:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125576 states. [2022-07-23 05:50:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125576 to 55053. [2022-07-23 05:50:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55053 states, 55044 states have (on average 1.141668483395102) internal successors, (62842), 55052 states have internal predecessors, (62842), 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) [2022-07-23 05:50:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55053 states to 55053 states and 62842 transitions. [2022-07-23 05:50:41,808 INFO L78 Accepts]: Start accepts. Automaton has 55053 states and 62842 transitions. Word has length 162 [2022-07-23 05:50:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:41,808 INFO L495 AbstractCegarLoop]: Abstraction has 55053 states and 62842 transitions. [2022-07-23 05:50:41,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.575757575757576) internal successors, (316), 32 states have internal predecessors, (316), 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) [2022-07-23 05:50:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 55053 states and 62842 transitions. [2022-07-23 05:50:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-23 05:50:41,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:41,828 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 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] [2022-07-23 05:50:41,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:42,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:42,028 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:50:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1229648570, now seen corresponding path program 4 times [2022-07-23 05:50:42,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:50:42,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597181132] [2022-07-23 05:50:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:42,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:50:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 681 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-23 05:50:42,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:50:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597181132] [2022-07-23 05:50:42,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597181132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:50:42,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152839855] [2022-07-23 05:50:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:50:42,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:42,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:50:42,360 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:50:42,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-23 05:50:42,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:50:42,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:50:42,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-23 05:50:42,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:42,680 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 [2022-07-23 05:50:42,827 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 13 treesize of output 9 [2022-07-23 05:50:42,832 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 13 treesize of output 9 [2022-07-23 05:50:43,033 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:50:43,033 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 [2022-07-23 05:50:43,054 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 14 treesize of output 16 [2022-07-23 05:50:43,059 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 14 treesize of output 16 [2022-07-23 05:50:43,065 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 14 treesize of output 16 [2022-07-23 05:50:43,207 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 14 treesize of output 16 [2022-07-23 05:50:43,258 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 14 treesize of output 16 [2022-07-23 05:50:43,263 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 14 treesize of output 16 [2022-07-23 05:50:43,353 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 14 treesize of output 16 [2022-07-23 05:50:43,356 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 14 treesize of output 16 [2022-07-23 05:50:43,438 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:43,439 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-23 05:50:43,447 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:43,447 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-23 05:50:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 100 proven. 685 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-23 05:50:43,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:49,312 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:49,313 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-07-23 05:50:49,321 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:49,321 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-07-23 05:50:49,326 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 11 treesize of output 7 [2022-07-23 05:50:49,360 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:49,361 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-07-23 05:50:49,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:50:49,370 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:50:49,370 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-23 05:50:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 96 proven. 689 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-23 05:50:49,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152839855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:49,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:50:49,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-07-23 05:50:49,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573070186] [2022-07-23 05:50:49,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:49,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-23 05:50:49,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:50:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-23 05:50:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=881, Unknown=9, NotChecked=0, Total=992 [2022-07-23 05:50:49,876 INFO L87 Difference]: Start difference. First operand 55053 states and 62842 transitions. Second operand has 32 states, 32 states have (on average 9.625) internal successors, (308), 31 states have internal predecessors, (308), 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) [2022-07-23 05:50:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:50,980 INFO L93 Difference]: Finished difference Result 93656 states and 106336 transitions. [2022-07-23 05:50:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-23 05:50:50,980 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 9.625) internal successors, (308), 31 states have internal predecessors, (308), 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 162 [2022-07-23 05:50:50,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:51,081 INFO L225 Difference]: With dead ends: 93656 [2022-07-23 05:50:51,082 INFO L226 Difference]: Without dead ends: 93656 [2022-07-23 05:50:51,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=569, Invalid=2614, Unknown=9, NotChecked=0, Total=3192 [2022-07-23 05:50:51,082 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 1356 mSDsluCounter, 3071 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:51,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 3379 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 738 Invalid, 0 Unknown, 530 Unchecked, 0.4s Time] [2022-07-23 05:50:51,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93656 states. [2022-07-23 05:50:51,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93656 to 65818. [2022-07-23 05:50:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65818 states, 65809 states have (on average 1.1415307936604415) internal successors, (75123), 65817 states have internal predecessors, (75123), 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) [2022-07-23 05:50:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65818 states to 65818 states and 75123 transitions. [2022-07-23 05:50:52,018 INFO L78 Accepts]: Start accepts. Automaton has 65818 states and 75123 transitions. Word has length 162 [2022-07-23 05:50:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:52,018 INFO L495 AbstractCegarLoop]: Abstraction has 65818 states and 75123 transitions. [2022-07-23 05:50:52,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.625) internal successors, (308), 31 states have internal predecessors, (308), 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) [2022-07-23 05:50:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 65818 states and 75123 transitions. [2022-07-23 05:50:52,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-23 05:50:52,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:52,040 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 5, 4, 3, 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] [2022-07-23 05:50:52,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-23 05:50:52,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-23 05:50:52,241 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:50:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1484828713, now seen corresponding path program 1 times [2022-07-23 05:50:52,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:50:52,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204960034] [2022-07-23 05:50:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:52,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:50:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 248 proven. 2 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2022-07-23 05:50:52,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:50:52,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204960034] [2022-07-23 05:50:52,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204960034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:50:52,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550694121] [2022-07-23 05:50:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:52,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:52,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:50:52,332 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:50:52,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-23 05:50:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 05:50:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 237 proven. 17 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-23 05:50:52,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 237 proven. 17 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-23 05:50:52,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550694121] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:52,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:50:52,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-07-23 05:50:52,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251123701] [2022-07-23 05:50:52,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:50:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:50:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:50:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:50:52,650 INFO L87 Difference]: Start difference. First operand 65818 states and 75123 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 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) [2022-07-23 05:50:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:52,885 INFO L93 Difference]: Finished difference Result 39539 states and 44769 transitions. [2022-07-23 05:50:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:50:52,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 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 166 [2022-07-23 05:50:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:52,932 INFO L225 Difference]: With dead ends: 39539 [2022-07-23 05:50:52,932 INFO L226 Difference]: Without dead ends: 39539 [2022-07-23 05:50:52,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 334 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:50:52,933 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 444 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:52,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 854 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:50:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39539 states. [2022-07-23 05:50:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39539 to 26064. [2022-07-23 05:50:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26064 states, 26055 states have (on average 1.1292266359623873) internal successors, (29422), 26063 states have internal predecessors, (29422), 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) [2022-07-23 05:50:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26064 states to 26064 states and 29422 transitions. [2022-07-23 05:50:53,434 INFO L78 Accepts]: Start accepts. Automaton has 26064 states and 29422 transitions. Word has length 166 [2022-07-23 05:50:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:53,434 INFO L495 AbstractCegarLoop]: Abstraction has 26064 states and 29422 transitions. [2022-07-23 05:50:53,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 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) [2022-07-23 05:50:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 26064 states and 29422 transitions. [2022-07-23 05:50:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-23 05:50:53,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:53,444 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 11, 11, 9, 8, 7, 7, 6, 5, 4, 3, 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] [2022-07-23 05:50:53,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:53,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-23 05:50:53,645 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:50:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:53,645 INFO L85 PathProgramCache]: Analyzing trace with hash -115562864, now seen corresponding path program 5 times [2022-07-23 05:50:53,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:50:53,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222645877] [2022-07-23 05:50:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:53,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:50:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 118 proven. 743 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-23 05:50:54,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:50:54,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222645877] [2022-07-23 05:50:54,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222645877] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:50:54,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374122464] [2022-07-23 05:50:54,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:50:54,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:50:54,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:50:54,005 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:50:54,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-23 05:50:54,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-23 05:50:54,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:50:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 05:50:54,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:54,725 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 [2022-07-23 05:50:54,797 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:50:54,797 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 17 treesize of output 21 [2022-07-23 05:50:54,885 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 13 treesize of output 9 [2022-07-23 05:50:55,005 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 31 treesize of output 13 [2022-07-23 05:50:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 202 proven. 661 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-23 05:50:55,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 218 proven. 645 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-23 05:50:55,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374122464] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:55,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:50:55,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-07-23 05:50:55,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393658235] [2022-07-23 05:50:55,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:55,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-23 05:50:55,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:50:55,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-23 05:50:55,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-07-23 05:50:55,422 INFO L87 Difference]: Start difference. First operand 26064 states and 29422 transitions. Second operand has 29 states, 28 states have (on average 10.321428571428571) internal successors, (289), 29 states have internal predecessors, (289), 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) [2022-07-23 05:51:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:01,482 INFO L93 Difference]: Finished difference Result 51194 states and 57772 transitions. [2022-07-23 05:51:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-07-23 05:51:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 10.321428571428571) internal successors, (289), 29 states have internal predecessors, (289), 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 173 [2022-07-23 05:51:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:01,559 INFO L225 Difference]: With dead ends: 51194 [2022-07-23 05:51:01,559 INFO L226 Difference]: Without dead ends: 51194 [2022-07-23 05:51:01,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10353 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6582, Invalid=22488, Unknown=0, NotChecked=0, Total=29070 [2022-07-23 05:51:01,562 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 2928 mSDsluCounter, 5954 mSDsCounter, 0 mSdLazyCounter, 3353 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2928 SdHoareTripleChecker+Valid, 6371 SdHoareTripleChecker+Invalid, 3920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 3353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:01,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2928 Valid, 6371 Invalid, 3920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 3353 Invalid, 0 Unknown, 198 Unchecked, 1.7s Time] [2022-07-23 05:51:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51194 states. [2022-07-23 05:51:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51194 to 28824. [2022-07-23 05:51:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28824 states, 28815 states have (on average 1.1310081554745792) internal successors, (32590), 28823 states have internal predecessors, (32590), 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) [2022-07-23 05:51:01,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28824 states to 28824 states and 32590 transitions. [2022-07-23 05:51:01,982 INFO L78 Accepts]: Start accepts. Automaton has 28824 states and 32590 transitions. Word has length 173 [2022-07-23 05:51:01,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:01,982 INFO L495 AbstractCegarLoop]: Abstraction has 28824 states and 32590 transitions. [2022-07-23 05:51:01,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 10.321428571428571) internal successors, (289), 29 states have internal predecessors, (289), 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) [2022-07-23 05:51:01,983 INFO L276 IsEmpty]: Start isEmpty. Operand 28824 states and 32590 transitions. [2022-07-23 05:51:01,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-23 05:51:01,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:01,992 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 11, 11, 9, 8, 7, 7, 6, 5, 4, 3, 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] [2022-07-23 05:51:02,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-23 05:51:02,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:51:02,193 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:51:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:02,194 INFO L85 PathProgramCache]: Analyzing trace with hash -115562863, now seen corresponding path program 1 times [2022-07-23 05:51:02,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:02,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254361193] [2022-07-23 05:51:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:02,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 117 proven. 744 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-23 05:51:02,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:02,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254361193] [2022-07-23 05:51:02,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254361193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:51:02,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940919701] [2022-07-23 05:51:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:02,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:51:02,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:51:02,520 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:51:02,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-23 05:51:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:02,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-23 05:51:02,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:51:02,715 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 [2022-07-23 05:51:02,962 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:51:02,963 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 [2022-07-23 05:51:02,970 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 12 treesize of output 14 [2022-07-23 05:51:03,170 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 13 treesize of output 9 [2022-07-23 05:51:03,177 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 13 treesize of output 9 [2022-07-23 05:51:03,404 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:51:03,405 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-07-23 05:51:03,426 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:51:03,426 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-07-23 05:51:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 82 proven. 787 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-23 05:51:03,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:51:04,493 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 29 treesize of output 27 [2022-07-23 05:51:04,497 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 27 treesize of output 25 [2022-07-23 05:51:04,503 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 54 treesize of output 50 [2022-07-23 05:51:04,506 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 90 treesize of output 82 [2022-07-23 05:51:04,533 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 16 treesize of output 14 [2022-07-23 05:51:04,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:51:11,452 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 50 treesize of output 46 [2022-07-23 05:51:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 88 proven. 781 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-23 05:51:11,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940919701] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:51:11,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:51:11,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 36 [2022-07-23 05:51:11,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772573075] [2022-07-23 05:51:11,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:51:11,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-23 05:51:11,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-23 05:51:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-07-23 05:51:11,514 INFO L87 Difference]: Start difference. First operand 28824 states and 32590 transitions. Second operand has 37 states, 36 states have (on average 9.86111111111111) internal successors, (355), 37 states have internal predecessors, (355), 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) [2022-07-23 05:51:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:24,305 INFO L93 Difference]: Finished difference Result 52214 states and 58825 transitions. [2022-07-23 05:51:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-07-23 05:51:24,305 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 9.86111111111111) internal successors, (355), 37 states have internal predecessors, (355), 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 173 [2022-07-23 05:51:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:24,356 INFO L225 Difference]: With dead ends: 52214 [2022-07-23 05:51:24,356 INFO L226 Difference]: Without dead ends: 52214 [2022-07-23 05:51:24,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19013 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=10256, Invalid=39696, Unknown=0, NotChecked=0, Total=49952 [2022-07-23 05:51:24,359 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 4329 mSDsluCounter, 5493 mSDsCounter, 0 mSdLazyCounter, 2926 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4329 SdHoareTripleChecker+Valid, 5900 SdHoareTripleChecker+Invalid, 4360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 978 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:24,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4329 Valid, 5900 Invalid, 4360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2926 Invalid, 0 Unknown, 978 Unchecked, 1.9s Time] [2022-07-23 05:51:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52214 states. [2022-07-23 05:51:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52214 to 28613. [2022-07-23 05:51:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28613 states, 28604 states have (on average 1.1304013424695847) internal successors, (32334), 28612 states have internal predecessors, (32334), 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) [2022-07-23 05:51:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28613 states to 28613 states and 32334 transitions. [2022-07-23 05:51:24,723 INFO L78 Accepts]: Start accepts. Automaton has 28613 states and 32334 transitions. Word has length 173 [2022-07-23 05:51:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:24,723 INFO L495 AbstractCegarLoop]: Abstraction has 28613 states and 32334 transitions. [2022-07-23 05:51:24,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 9.86111111111111) internal successors, (355), 37 states have internal predecessors, (355), 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) [2022-07-23 05:51:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 28613 states and 32334 transitions. [2022-07-23 05:51:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-23 05:51:24,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:24,733 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 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] [2022-07-23 05:51:24,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-23 05:51:24,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:51:24,934 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:51:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:24,934 INFO L85 PathProgramCache]: Analyzing trace with hash -695935548, now seen corresponding path program 2 times [2022-07-23 05:51:24,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:24,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360545271] [2022-07-23 05:51:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:24,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 56 proven. 736 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-23 05:51:25,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:25,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360545271] [2022-07-23 05:51:25,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360545271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:51:25,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942259513] [2022-07-23 05:51:25,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:51:25,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:51:25,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:51:25,188 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:51:25,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-23 05:51:25,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:51:25,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:51:25,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-23 05:51:25,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:51:25,535 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 13 treesize of output 9 [2022-07-23 05:51:25,669 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 16 treesize of output 8 [2022-07-23 05:51:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 121 proven. 653 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-23 05:51:25,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:51:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 94 proven. 643 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-23 05:51:25,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942259513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:51:25,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:51:25,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 24 [2022-07-23 05:51:25,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695579001] [2022-07-23 05:51:25,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:51:25,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:51:25,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:25,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:51:25,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-07-23 05:51:25,988 INFO L87 Difference]: Start difference. First operand 28613 states and 32334 transitions. Second operand has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 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) [2022-07-23 05:51:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:29,507 INFO L93 Difference]: Finished difference Result 47009 states and 52994 transitions. [2022-07-23 05:51:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-07-23 05:51:29,508 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 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 174 [2022-07-23 05:51:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:29,554 INFO L225 Difference]: With dead ends: 47009 [2022-07-23 05:51:29,554 INFO L226 Difference]: Without dead ends: 47009 [2022-07-23 05:51:29,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 442 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8401 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4703, Invalid=19789, Unknown=0, NotChecked=0, Total=24492 [2022-07-23 05:51:29,558 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 1177 mSDsluCounter, 3718 mSDsCounter, 0 mSdLazyCounter, 2477 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 4005 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:29,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1177 Valid, 4005 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2477 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-23 05:51:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47009 states. [2022-07-23 05:51:29,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47009 to 29921. [2022-07-23 05:51:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29921 states, 29912 states have (on average 1.1310510831773202) internal successors, (33832), 29920 states have internal predecessors, (33832), 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) [2022-07-23 05:51:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29921 states to 29921 states and 33832 transitions. [2022-07-23 05:51:29,972 INFO L78 Accepts]: Start accepts. Automaton has 29921 states and 33832 transitions. Word has length 174 [2022-07-23 05:51:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:29,972 INFO L495 AbstractCegarLoop]: Abstraction has 29921 states and 33832 transitions. [2022-07-23 05:51:29,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 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) [2022-07-23 05:51:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 29921 states and 33832 transitions. [2022-07-23 05:51:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-23 05:51:29,984 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:29,984 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 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] [2022-07-23 05:51:30,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-23 05:51:30,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-07-23 05:51:30,199 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:51:30,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:30,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1469366084, now seen corresponding path program 3 times [2022-07-23 05:51:30,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:30,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37733284] [2022-07-23 05:51:30,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:30,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 531 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-07-23 05:51:30,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:30,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37733284] [2022-07-23 05:51:30,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37733284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:51:30,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156241199] [2022-07-23 05:51:30,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:51:30,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:51:30,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:51:30,284 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:51:30,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-23 05:51:30,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-23 05:51:30,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:51:30,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:51:30,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:51:30,560 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 [2022-07-23 05:51:30,630 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:51:30,630 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 [2022-07-23 05:51:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 532 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-07-23 05:51:30,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:51:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 532 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-07-23 05:51:30,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156241199] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:51:30,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:51:30,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-07-23 05:51:30,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668232225] [2022-07-23 05:51:30,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:51:30,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:51:30,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:30,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:51:30,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:51:30,885 INFO L87 Difference]: Start difference. First operand 29921 states and 33832 transitions. Second operand has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 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) [2022-07-23 05:51:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:31,211 INFO L93 Difference]: Finished difference Result 33289 states and 37504 transitions. [2022-07-23 05:51:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:51:31,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 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 174 [2022-07-23 05:51:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:31,251 INFO L225 Difference]: With dead ends: 33289 [2022-07-23 05:51:31,251 INFO L226 Difference]: Without dead ends: 33289 [2022-07-23 05:51:31,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:51:31,252 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 276 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:31,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 644 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:51:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33289 states. [2022-07-23 05:51:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33289 to 30293. [2022-07-23 05:51:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30293 states, 30284 states have (on average 1.1283185840707965) internal successors, (34170), 30292 states have internal predecessors, (34170), 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) [2022-07-23 05:51:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30293 states to 30293 states and 34170 transitions. [2022-07-23 05:51:31,534 INFO L78 Accepts]: Start accepts. Automaton has 30293 states and 34170 transitions. Word has length 174 [2022-07-23 05:51:31,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:31,534 INFO L495 AbstractCegarLoop]: Abstraction has 30293 states and 34170 transitions. [2022-07-23 05:51:31,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 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) [2022-07-23 05:51:31,534 INFO L276 IsEmpty]: Start isEmpty. Operand 30293 states and 34170 transitions. [2022-07-23 05:51:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-23 05:51:31,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:31,546 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 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] [2022-07-23 05:51:31,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-23 05:51:31,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:51:31,772 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:51:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:31,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2129791236, now seen corresponding path program 4 times [2022-07-23 05:51:31,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:31,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7544977] [2022-07-23 05:51:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:31,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 523 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-23 05:51:31,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:31,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7544977] [2022-07-23 05:51:31,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7544977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:51:31,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495130263] [2022-07-23 05:51:31,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:51:31,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:51:31,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:51:31,849 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:51:31,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-23 05:51:32,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:51:32,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:51:32,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 05:51:32,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:51:32,085 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 [2022-07-23 05:51:32,161 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:51:32,161 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 [2022-07-23 05:51:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 524 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-23 05:51:32,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:51:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 524 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-23 05:51:32,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495130263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:51:32,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:51:32,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-07-23 05:51:32,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470010548] [2022-07-23 05:51:32,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:51:32,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:51:32,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:32,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:51:32,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:51:32,374 INFO L87 Difference]: Start difference. First operand 30293 states and 34170 transitions. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 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) [2022-07-23 05:51:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:32,729 INFO L93 Difference]: Finished difference Result 28600 states and 32115 transitions. [2022-07-23 05:51:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:51:32,729 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 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 174 [2022-07-23 05:51:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:32,757 INFO L225 Difference]: With dead ends: 28600 [2022-07-23 05:51:32,757 INFO L226 Difference]: Without dead ends: 28600 [2022-07-23 05:51:32,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:51:32,757 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 260 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:32,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 694 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:51:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28600 states. [2022-07-23 05:51:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28600 to 14393. [2022-07-23 05:51:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14393 states, 14384 states have (on average 1.1313264738598443) internal successors, (16273), 14392 states have internal predecessors, (16273), 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) [2022-07-23 05:51:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14393 states to 14393 states and 16273 transitions. [2022-07-23 05:51:33,003 INFO L78 Accepts]: Start accepts. Automaton has 14393 states and 16273 transitions. Word has length 174 [2022-07-23 05:51:33,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:33,004 INFO L495 AbstractCegarLoop]: Abstraction has 14393 states and 16273 transitions. [2022-07-23 05:51:33,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 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) [2022-07-23 05:51:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 14393 states and 16273 transitions. [2022-07-23 05:51:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-23 05:51:33,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:33,011 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 10, 10, 10, 9, 8, 7, 6, 4, 4, 3, 3, 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] [2022-07-23 05:51:33,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-23 05:51:33,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-23 05:51:33,211 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:51:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:33,212 INFO L85 PathProgramCache]: Analyzing trace with hash 5125917, now seen corresponding path program 1 times [2022-07-23 05:51:33,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:33,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972489250] [2022-07-23 05:51:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:33,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 117 proven. 843 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-23 05:51:33,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:33,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972489250] [2022-07-23 05:51:33,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972489250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:51:33,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784463490] [2022-07-23 05:51:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:33,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:51:33,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:51:33,520 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:51:33,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-23 05:51:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-23 05:51:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:51:33,789 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 [2022-07-23 05:51:33,926 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 13 treesize of output 9 [2022-07-23 05:51:33,931 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 13 treesize of output 9 [2022-07-23 05:51:34,209 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:51:34,209 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 [2022-07-23 05:51:34,215 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 16 treesize of output 18 [2022-07-23 05:51:34,224 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 16 treesize of output 18 [2022-07-23 05:51:34,232 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 16 treesize of output 18 [2022-07-23 05:51:34,236 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 16 treesize of output 18 [2022-07-23 05:51:34,280 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 16 treesize of output 18 [2022-07-23 05:51:34,283 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 16 treesize of output 18 [2022-07-23 05:51:34,382 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 16 treesize of output 18 [2022-07-23 05:51:34,386 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 16 treesize of output 18 [2022-07-23 05:51:34,464 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 15 treesize of output 7 [2022-07-23 05:51:34,466 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 15 treesize of output 7 [2022-07-23 05:51:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 113 proven. 837 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-23 05:51:34,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:51:34,708 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2577 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_2577) c_~t4~0.base) (+ c_~t4~0.offset 4)) 0)) (forall ((v_ArrVal_2576 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_2576) c_~t4~0.base) (+ c_~t4~0.offset 4))))) is different from false [2022-07-23 05:51:35,665 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:51:35,665 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-07-23 05:51:35,668 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 36 treesize of output 24 [2022-07-23 05:51:35,671 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 11 treesize of output 7 [2022-07-23 05:51:35,681 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:51:35,681 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-07-23 05:51:35,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:51:35,684 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 20 treesize of output 8 [2022-07-23 05:51:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 103 proven. 583 refuted. 0 times theorem prover too weak. 67 trivial. 264 not checked. [2022-07-23 05:51:35,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784463490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:51:35,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:51:35,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2022-07-23 05:51:35,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804376068] [2022-07-23 05:51:35,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:51:35,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:51:35,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:35,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:51:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=4, NotChecked=42, Total=552 [2022-07-23 05:51:35,960 INFO L87 Difference]: Start difference. First operand 14393 states and 16273 transitions. Second operand has 24 states, 24 states have (on average 10.375) internal successors, (249), 23 states have internal predecessors, (249), 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) [2022-07-23 05:51:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:37,340 INFO L93 Difference]: Finished difference Result 28131 states and 31577 transitions. [2022-07-23 05:51:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-23 05:51:37,341 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 10.375) internal successors, (249), 23 states have internal predecessors, (249), 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 176 [2022-07-23 05:51:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:37,369 INFO L225 Difference]: With dead ends: 28131 [2022-07-23 05:51:37,369 INFO L226 Difference]: Without dead ends: 28131 [2022-07-23 05:51:37,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 355 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=530, Invalid=2775, Unknown=5, NotChecked=112, Total=3422 [2022-07-23 05:51:37,370 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1381 mSDsluCounter, 3317 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 3611 SdHoareTripleChecker+Invalid, 2424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1185 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:37,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1381 Valid, 3611 Invalid, 2424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1020 Invalid, 0 Unknown, 1185 Unchecked, 0.5s Time] [2022-07-23 05:51:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28131 states. [2022-07-23 05:51:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28131 to 14419. [2022-07-23 05:51:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14419 states, 14410 states have (on average 1.1302567661346288) internal successors, (16287), 14418 states have internal predecessors, (16287), 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) [2022-07-23 05:51:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14419 states to 14419 states and 16287 transitions. [2022-07-23 05:51:37,539 INFO L78 Accepts]: Start accepts. Automaton has 14419 states and 16287 transitions. Word has length 176 [2022-07-23 05:51:37,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:37,539 INFO L495 AbstractCegarLoop]: Abstraction has 14419 states and 16287 transitions. [2022-07-23 05:51:37,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.375) internal successors, (249), 23 states have internal predecessors, (249), 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) [2022-07-23 05:51:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 14419 states and 16287 transitions. [2022-07-23 05:51:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-23 05:51:37,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:37,547 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 12, 12, 10, 8, 8, 7, 6, 5, 4, 3, 3, 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] [2022-07-23 05:51:37,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-23 05:51:37,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:51:37,747 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:51:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:37,748 INFO L85 PathProgramCache]: Analyzing trace with hash 58548126, now seen corresponding path program 1 times [2022-07-23 05:51:37,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:37,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225099987] [2022-07-23 05:51:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:37,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 620 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2022-07-23 05:51:37,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:37,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225099987] [2022-07-23 05:51:37,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225099987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:51:37,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:51:37,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:51:37,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287731659] [2022-07-23 05:51:37,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:51:37,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:51:37,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:37,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:51:37,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:51:37,810 INFO L87 Difference]: Start difference. First operand 14419 states and 16287 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-07-23 05:51:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:37,857 INFO L93 Difference]: Finished difference Result 14470 states and 16265 transitions. [2022-07-23 05:51:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:51:37,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 181 [2022-07-23 05:51:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:37,874 INFO L225 Difference]: With dead ends: 14470 [2022-07-23 05:51:37,874 INFO L226 Difference]: Without dead ends: 14470 [2022-07-23 05:51:37,874 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 [2022-07-23 05:51:37,875 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 30 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:37,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 140 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:51:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14470 states. [2022-07-23 05:51:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14470 to 11588. [2022-07-23 05:51:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11588 states, 11579 states have (on average 1.1302357716555833) internal successors, (13087), 11587 states have internal predecessors, (13087), 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) [2022-07-23 05:51:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11588 states to 11588 states and 13087 transitions. [2022-07-23 05:51:38,003 INFO L78 Accepts]: Start accepts. Automaton has 11588 states and 13087 transitions. Word has length 181 [2022-07-23 05:51:38,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:38,003 INFO L495 AbstractCegarLoop]: Abstraction has 11588 states and 13087 transitions. [2022-07-23 05:51:38,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2022-07-23 05:51:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 11588 states and 13087 transitions. [2022-07-23 05:51:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-23 05:51:38,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:38,011 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 13, 13, 10, 8, 8, 7, 6, 6, 4, 4, 3, 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] [2022-07-23 05:51:38,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-23 05:51:38,012 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:51:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1867130138, now seen corresponding path program 6 times [2022-07-23 05:51:38,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:38,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279855545] [2022-07-23 05:51:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:38,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 285 proven. 803 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-23 05:51:38,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:38,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279855545] [2022-07-23 05:51:38,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279855545] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:51:38,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561869415] [2022-07-23 05:51:38,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:51:38,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:51:38,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:51:38,392 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:51:38,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-23 05:51:38,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-23 05:51:38,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:51:38,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-23 05:51:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:51:38,877 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 [2022-07-23 05:51:38,940 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:51:38,941 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 17 treesize of output 21 [2022-07-23 05:51:39,081 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 13 treesize of output 9 [2022-07-23 05:51:39,254 INFO L356 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-07-23 05:51:39,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2022-07-23 05:51:39,304 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 38 treesize of output 36 [2022-07-23 05:51:39,318 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 38 treesize of output 36 [2022-07-23 05:51:39,505 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:51:39,506 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2022-07-23 05:51:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 423 proven. 681 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-23 05:51:40,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:51:40,549 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2786 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_2786) c_~S~0.base) (+ c_~S~0.offset 4))) 1)) is different from false [2022-07-23 05:51:40,556 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_~x1~0.base_51 Int) (v_ArrVal_2786 (Array Int Int))) (or (= (select (store |c_#valid| v_~x1~0.base_51 1) (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_51 v_ArrVal_2786) c_~S~0.base) (+ c_~S~0.offset 4))) 1) (not (= (select |c_#valid| v_~x1~0.base_51) 0)))) is different from false [2022-07-23 05:51:40,639 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_~x1~0.base_51 Int) (v_ArrVal_2786 (Array Int Int))) (or (= (select (store |c_#valid| v_~x1~0.base_51 1) (select (select (store |c_#memory_$Pointer$.base| v_~x1~0.base_51 v_ArrVal_2786) c_~x1~0.base) (+ 4 c_~x1~0.offset))) 1) (not (= (select |c_#valid| v_~x1~0.base_51) 0)))) is different from false [2022-07-23 05:51:40,680 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:51:40,680 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 1 case distinctions, treesize of input 27 treesize of output 28 [2022-07-23 05:51:40,682 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 46 treesize of output 34 [2022-07-23 05:51:40,685 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 16 treesize of output 12 [2022-07-23 05:51:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 245 proven. 493 refuted. 0 times theorem prover too weak. 69 trivial. 366 not checked. [2022-07-23 05:51:47,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561869415] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:51:47,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:51:47,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2022-07-23 05:51:47,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732157856] [2022-07-23 05:51:47,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:51:47,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-23 05:51:47,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:51:47,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-23 05:51:47,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1244, Unknown=3, NotChecked=222, Total=1640 [2022-07-23 05:51:47,300 INFO L87 Difference]: Start difference. First operand 11588 states and 13087 transitions. Second operand has 41 states, 40 states have (on average 9.625) internal successors, (385), 41 states have internal predecessors, (385), 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)