./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/substring-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/substring-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:00:05,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:00:05,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:00:05,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:00:05,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:00:05,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:00:05,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:00:05,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:00:05,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:00:05,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:00:05,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:00:05,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:00:05,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:00:05,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:00:05,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:00:05,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:00:05,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:00:05,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:00:05,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:00:05,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:00:05,987 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:00:05,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:00:05,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:00:05,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:00:05,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:00:05,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:00:05,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:00:05,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:00:05,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:00:05,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:00:05,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:00:05,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:00:05,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:00:05,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:00:05,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:00:06,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:00:06,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:00:06,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:00:06,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:00:06,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:00:06,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:00:06,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:00:06,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:00:06,029 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:00:06,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:00:06,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:00:06,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:00:06,030 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:00:06,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:00:06,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:00:06,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:00:06,031 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:00:06,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:00:06,032 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:00:06,033 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:00:06,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:00:06,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:00:06,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:00:06,033 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:00:06,033 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:00:06,034 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:00:06,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:00:06,034 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:00:06,034 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:00:06,034 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:00:06,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:00:06,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:00:06,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:00:06,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:00:06,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:00:06,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:00:06,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:00:06,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:00:06,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e [2022-07-21 17:00:06,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:00:06,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:00:06,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:00:06,339 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:00:06,340 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:00:06,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2022-07-21 17:00:06,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34547b37a/c81343015a8c4f4e985aa0fe8c2cd0b5/FLAG36e0ab96e [2022-07-21 17:00:06,779 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:00:06,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2022-07-21 17:00:06,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34547b37a/c81343015a8c4f4e985aa0fe8c2cd0b5/FLAG36e0ab96e [2022-07-21 17:00:06,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34547b37a/c81343015a8c4f4e985aa0fe8c2cd0b5 [2022-07-21 17:00:06,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:00:06,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:00:06,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:00:06,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:00:06,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:00:06,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:00:06" (1/1) ... [2022-07-21 17:00:06,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac9397f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:06, skipping insertion in model container [2022-07-21 17:00:06,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:00:06" (1/1) ... [2022-07-21 17:00:06,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:00:06,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:00:07,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:00:07,086 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:00:07,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:00:07,141 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:00:07,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07 WrapperNode [2022-07-21 17:00:07,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:00:07,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:00:07,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:00:07,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:00:07,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07" (1/1) ... [2022-07-21 17:00:07,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07" (1/1) ... [2022-07-21 17:00:07,191 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-07-21 17:00:07,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:00:07,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:00:07,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:00:07,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:00:07,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07" (1/1) ... [2022-07-21 17:00:07,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07" (1/1) ... [2022-07-21 17:00:07,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07" (1/1) ... [2022-07-21 17:00:07,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07" (1/1) ... [2022-07-21 17:00:07,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07" (1/1) ... [2022-07-21 17:00:07,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07" (1/1) ... [2022-07-21 17:00:07,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07" (1/1) ... [2022-07-21 17:00:07,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:00:07,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:00:07,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:00:07,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:00:07,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07" (1/1) ... [2022-07-21 17:00:07,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:00:07,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:07,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:00:07,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:00:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:00:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:00:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:00:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:00:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:00:07,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:00:07,486 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:00:07,487 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:00:07,710 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:00:07,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:00:07,719 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 17:00:07,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:00:07 BoogieIcfgContainer [2022-07-21 17:00:07,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:00:07,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:00:07,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:00:07,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:00:07,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:00:06" (1/3) ... [2022-07-21 17:00:07,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2f86db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:00:07, skipping insertion in model container [2022-07-21 17:00:07,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:00:07" (2/3) ... [2022-07-21 17:00:07,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2f86db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:00:07, skipping insertion in model container [2022-07-21 17:00:07,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:00:07" (3/3) ... [2022-07-21 17:00:07,727 INFO L111 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2022-07-21 17:00:07,735 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:00:07,736 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-21 17:00:07,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:00:07,783 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@2cae575e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@165b5efc [2022-07-21 17:00:07,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-21 17:00:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:00:07,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:07,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:07,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:07,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-21 17:00:07,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:07,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582358710] [2022-07-21 17:00:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:07,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:07,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582358710] [2022-07-21 17:00:07,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582358710] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:07,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:07,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:00:07,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181383946] [2022-07-21 17:00:07,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:07,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:00:07,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:08,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:00:08,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:08,015 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:08,072 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-07-21 17:00:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:00:08,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:00:08,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:08,080 INFO L225 Difference]: With dead ends: 96 [2022-07-21 17:00:08,081 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 17:00:08,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:08,086 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:08,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 108 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 17:00:08,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 53. [2022-07-21 17:00:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-21 17:00:08,117 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-07-21 17:00:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:08,117 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-21 17:00:08,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-21 17:00:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:00:08,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:08,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:08,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:00:08,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-21 17:00:08,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:08,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036203427] [2022-07-21 17:00:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:08,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:08,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:08,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036203427] [2022-07-21 17:00:08,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036203427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:08,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:08,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:00:08,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301062142] [2022-07-21 17:00:08,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:08,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:00:08,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:08,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:00:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:00:08,167 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:08,193 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-07-21 17:00:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:00:08,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:00:08,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:08,195 INFO L225 Difference]: With dead ends: 51 [2022-07-21 17:00:08,195 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 17:00:08,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:00:08,196 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 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 [2022-07-21 17:00:08,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:08,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 17:00:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-21 17:00:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-21 17:00:08,213 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2022-07-21 17:00:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:08,213 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-21 17:00:08,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-21 17:00:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:00:08,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:08,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:08,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:00:08,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:08,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-21 17:00:08,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:08,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357211330] [2022-07-21 17:00:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:08,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:08,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:08,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357211330] [2022-07-21 17:00:08,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357211330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:08,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:08,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:00:08,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626971575] [2022-07-21 17:00:08,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:08,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:00:08,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:08,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:00:08,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:08,294 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:08,380 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2022-07-21 17:00:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:00:08,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 17:00:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:08,381 INFO L225 Difference]: With dead ends: 93 [2022-07-21 17:00:08,381 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 17:00:08,382 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 [2022-07-21 17:00:08,382 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:08,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 17:00:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2022-07-21 17:00:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-21 17:00:08,387 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 7 [2022-07-21 17:00:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:08,387 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-21 17:00:08,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-21 17:00:08,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 17:00:08,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:08,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:08,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:00:08,395 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:08,395 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-21 17:00:08,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:08,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683893089] [2022-07-21 17:00:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:08,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:08,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:08,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683893089] [2022-07-21 17:00:08,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683893089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:08,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:08,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:00:08,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730456838] [2022-07-21 17:00:08,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:08,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:00:08,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:08,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:00:08,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:08,440 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2022-07-21 17:00:08,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:08,462 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-07-21 17:00:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:00:08,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 [2022-07-21 17:00:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:08,463 INFO L225 Difference]: With dead ends: 52 [2022-07-21 17:00:08,463 INFO L226 Difference]: Without dead ends: 52 [2022-07-21 17:00:08,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:08,464 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 93 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 36 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 [2022-07-21 17:00:08,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:08,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-21 17:00:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-21 17:00:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-07-21 17:00:08,468 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 9 [2022-07-21 17:00:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:08,468 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-07-21 17:00:08,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2022-07-21 17:00:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-07-21 17:00:08,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 17:00:08,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:08,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:08,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:00:08,469 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:08,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:08,470 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-21 17:00:08,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:08,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62468143] [2022-07-21 17:00:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:08,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:08,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:08,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62468143] [2022-07-21 17:00:08,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62468143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:08,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:08,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:00:08,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326845716] [2022-07-21 17:00:08,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:08,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:00:08,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:08,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:00:08,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:08,499 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-07-21 17:00:08,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:08,511 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-07-21 17:00:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:00:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2022-07-21 17:00:08,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:08,512 INFO L225 Difference]: With dead ends: 94 [2022-07-21 17:00:08,512 INFO L226 Difference]: Without dead ends: 94 [2022-07-21 17:00:08,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:08,513 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:08,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-21 17:00:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2022-07-21 17:00:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-21 17:00:08,517 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2022-07-21 17:00:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:08,518 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-21 17:00:08,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-07-21 17:00:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-21 17:00:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 17:00:08,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:08,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:08,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 17:00:08,519 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:08,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:08,519 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-21 17:00:08,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:08,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217657130] [2022-07-21 17:00:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:08,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:08,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:08,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217657130] [2022-07-21 17:00:08,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217657130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:08,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:08,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:00:08,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289825009] [2022-07-21 17:00:08,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:08,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:00:08,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:08,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:00:08,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:00:08,587 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2022-07-21 17:00:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:08,637 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-07-21 17:00:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:00:08,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 [2022-07-21 17:00:08,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:08,639 INFO L225 Difference]: With dead ends: 98 [2022-07-21 17:00:08,639 INFO L226 Difference]: Without dead ends: 98 [2022-07-21 17:00:08,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:00:08,640 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 155 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:08,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-21 17:00:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2022-07-21 17:00:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.553191489361702) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-07-21 17:00:08,644 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2022-07-21 17:00:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:08,644 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-07-21 17:00:08,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2022-07-21 17:00:08,645 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-07-21 17:00:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 17:00:08,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:08,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:08,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 17:00:08,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:08,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:08,646 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-21 17:00:08,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:08,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753784344] [2022-07-21 17:00:08,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:08,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:08,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:08,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753784344] [2022-07-21 17:00:08,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753784344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:08,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:08,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:00:08,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339219019] [2022-07-21 17:00:08,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:08,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:00:08,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:08,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:00:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:00:08,739 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2022-07-21 17:00:08,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:08,800 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-07-21 17:00:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:00:08,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 [2022-07-21 17:00:08,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:08,801 INFO L225 Difference]: With dead ends: 94 [2022-07-21 17:00:08,801 INFO L226 Difference]: Without dead ends: 94 [2022-07-21 17:00:08,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:00:08,802 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:08,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 88 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:08,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-21 17:00:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2022-07-21 17:00:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-21 17:00:08,807 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2022-07-21 17:00:08,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:08,807 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-21 17:00:08,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2022-07-21 17:00:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-21 17:00:08,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 17:00:08,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:08,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:08,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 17:00:08,808 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:08,809 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-21 17:00:08,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:08,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510593049] [2022-07-21 17:00:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:08,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:08,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:08,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510593049] [2022-07-21 17:00:08,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510593049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:08,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:08,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:00:08,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057995732] [2022-07-21 17:00:08,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:08,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:00:08,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:08,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:00:08,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:08,863 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2022-07-21 17:00:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:08,883 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2022-07-21 17:00:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:00:08,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 [2022-07-21 17:00:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:08,884 INFO L225 Difference]: With dead ends: 62 [2022-07-21 17:00:08,884 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 17:00:08,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:08,885 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 85 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:08,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 17:00:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-21 17:00:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.530612244897959) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-07-21 17:00:08,889 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 10 [2022-07-21 17:00:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:08,889 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-07-21 17:00:08,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2022-07-21 17:00:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-07-21 17:00:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:00:08,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:08,890 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:08,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 17:00:08,891 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:08,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:08,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-21 17:00:08,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:08,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661009868] [2022-07-21 17:00:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:08,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:08,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661009868] [2022-07-21 17:00:08,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661009868] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613646721] [2022-07-21 17:00:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:08,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:08,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:08,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:08,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:00:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:09,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:00:09,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:09,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:00:09,084 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 10 treesize of output 8 [2022-07-21 17:00:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:09,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:09,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613646721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:09,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:09,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-21 17:00:09,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190206905] [2022-07-21 17:00:09,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:09,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:00:09,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:00:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:00:09,233 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 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) [2022-07-21 17:00:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:09,373 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2022-07-21 17:00:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:00:09,373 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 17:00:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:09,374 INFO L225 Difference]: With dead ends: 143 [2022-07-21 17:00:09,374 INFO L226 Difference]: Without dead ends: 143 [2022-07-21 17:00:09,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:00:09,375 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 277 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:09,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 233 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-21 17:00:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 57. [2022-07-21 17:00:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.488888888888889) internal successors, (67), 56 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) [2022-07-21 17:00:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-21 17:00:09,379 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 11 [2022-07-21 17:00:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:09,379 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-21 17:00:09,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 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) [2022-07-21 17:00:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-21 17:00:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:00:09,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:09,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:09,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:09,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:09,598 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:09,598 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2022-07-21 17:00:09,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:09,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858650625] [2022-07-21 17:00:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:09,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:09,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:09,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858650625] [2022-07-21 17:00:09,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858650625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:09,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:09,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:00:09,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498701169] [2022-07-21 17:00:09,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:09,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:00:09,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:09,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:00:09,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:00:09,672 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:09,723 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2022-07-21 17:00:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:00:09,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 17:00:09,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:09,725 INFO L225 Difference]: With dead ends: 81 [2022-07-21 17:00:09,725 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 17:00:09,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:00:09,725 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 230 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:09,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 17:00:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2022-07-21 17:00:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.5) internal successors, (69), 57 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) [2022-07-21 17:00:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-07-21 17:00:09,735 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 12 [2022-07-21 17:00:09,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:09,735 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-07-21 17:00:09,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-07-21 17:00:09,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:00:09,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:09,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:09,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 17:00:09,738 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:09,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-21 17:00:09,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:09,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872594871] [2022-07-21 17:00:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:09,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:09,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:09,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872594871] [2022-07-21 17:00:09,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872594871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:09,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:09,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:00:09,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968790528] [2022-07-21 17:00:09,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:09,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:00:09,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:00:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:09,786 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:09,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:09,811 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-21 17:00:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:00:09,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 17:00:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:09,813 INFO L225 Difference]: With dead ends: 57 [2022-07-21 17:00:09,813 INFO L226 Difference]: Without dead ends: 57 [2022-07-21 17:00:09,813 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 [2022-07-21 17:00:09,813 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 61 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:09,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-21 17:00:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-21 17:00:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 56 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) [2022-07-21 17:00:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-21 17:00:09,820 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2022-07-21 17:00:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:09,820 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-21 17:00:09,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-21 17:00:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:00:09,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:09,822 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:09,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 17:00:09,822 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:09,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-21 17:00:09,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:09,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439977903] [2022-07-21 17:00:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:09,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:09,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:09,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439977903] [2022-07-21 17:00:09,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439977903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:09,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926358039] [2022-07-21 17:00:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:09,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:09,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:09,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:09,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:00:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:09,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:00:09,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:09,972 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:09,973 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:00:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:10,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:10,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926358039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:10,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:10,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 17:00:10,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831011780] [2022-07-21 17:00:10,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:10,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:00:10,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:10,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:00:10,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:00:10,145 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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) [2022-07-21 17:00:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:10,280 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2022-07-21 17:00:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:00:10,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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 13 [2022-07-21 17:00:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:10,280 INFO L225 Difference]: With dead ends: 115 [2022-07-21 17:00:10,281 INFO L226 Difference]: Without dead ends: 115 [2022-07-21 17:00:10,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:00:10,281 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 180 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:10,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 193 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:10,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-21 17:00:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 54. [2022-07-21 17:00:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-21 17:00:10,284 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 13 [2022-07-21 17:00:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:10,284 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-21 17:00:10,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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) [2022-07-21 17:00:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-21 17:00:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 17:00:10,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:10,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:10,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:10,501 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,SelfDestructingSolverStorable11 [2022-07-21 17:00:10,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:10,502 INFO L85 PathProgramCache]: Analyzing trace with hash 172811107, now seen corresponding path program 1 times [2022-07-21 17:00:10,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:10,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876834583] [2022-07-21 17:00:10,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:10,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:10,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:10,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876834583] [2022-07-21 17:00:10,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876834583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:10,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:10,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:00:10,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074328882] [2022-07-21 17:00:10,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:10,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:00:10,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:10,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:00:10,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:00:10,535 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:10,581 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-07-21 17:00:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:00:10,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 17:00:10,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:10,582 INFO L225 Difference]: With dead ends: 54 [2022-07-21 17:00:10,582 INFO L226 Difference]: Without dead ends: 54 [2022-07-21 17:00:10,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:00:10,582 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 74 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:10,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 62 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-21 17:00:10,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-07-21 17:00:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-07-21 17:00:10,585 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 14 [2022-07-21 17:00:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:10,585 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-07-21 17:00:10,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,585 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-07-21 17:00:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 17:00:10,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:10,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:10,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 17:00:10,586 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash 172811108, now seen corresponding path program 1 times [2022-07-21 17:00:10,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:10,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250100926] [2022-07-21 17:00:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:10,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:10,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:10,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250100926] [2022-07-21 17:00:10,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250100926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:10,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:10,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:00:10,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352577803] [2022-07-21 17:00:10,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:10,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:00:10,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:10,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:00:10,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:00:10,644 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:10,696 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-07-21 17:00:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:00:10,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 17:00:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:10,697 INFO L225 Difference]: With dead ends: 69 [2022-07-21 17:00:10,697 INFO L226 Difference]: Without dead ends: 69 [2022-07-21 17:00:10,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:00:10,698 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 156 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:10,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 75 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:10,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-21 17:00:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2022-07-21 17:00:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-07-21 17:00:10,701 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 14 [2022-07-21 17:00:10,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:10,702 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-07-21 17:00:10,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-07-21 17:00:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 17:00:10,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:10,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:10,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 17:00:10,704 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1432273078, now seen corresponding path program 1 times [2022-07-21 17:00:10,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:10,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45401385] [2022-07-21 17:00:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:10,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:10,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:10,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45401385] [2022-07-21 17:00:10,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45401385] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:10,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:10,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:00:10,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264221285] [2022-07-21 17:00:10,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:10,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:00:10,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:10,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:00:10,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:10,762 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:10,776 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-07-21 17:00:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:00:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-07-21 17:00:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:10,777 INFO L225 Difference]: With dead ends: 58 [2022-07-21 17:00:10,777 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 17:00:10,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:00:10,779 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:10,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 17:00:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-21 17:00:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 54 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) [2022-07-21 17:00:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-07-21 17:00:10,783 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 16 [2022-07-21 17:00:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:10,783 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-07-21 17:00:10,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-07-21 17:00:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:00:10,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:10,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:10,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 17:00:10,784 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954455, now seen corresponding path program 1 times [2022-07-21 17:00:10,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:10,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961383569] [2022-07-21 17:00:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:10,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:10,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:10,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961383569] [2022-07-21 17:00:10,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961383569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:10,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:10,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:00:10,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036537741] [2022-07-21 17:00:10,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:10,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:00:10,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:10,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:00:10,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:00:10,811 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:10,840 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-07-21 17:00:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:00:10,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 17:00:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:10,841 INFO L225 Difference]: With dead ends: 55 [2022-07-21 17:00:10,841 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 17:00:10,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:00:10,842 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:10,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 54 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 17:00:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-07-21 17:00:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 53 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) [2022-07-21 17:00:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-07-21 17:00:10,843 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 18 [2022-07-21 17:00:10,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:10,843 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-07-21 17:00:10,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-07-21 17:00:10,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:00:10,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:10,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:10,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 17:00:10,844 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:10,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:10,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954454, now seen corresponding path program 1 times [2022-07-21 17:00:10,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:10,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215459287] [2022-07-21 17:00:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:10,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:10,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:10,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215459287] [2022-07-21 17:00:10,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215459287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:10,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:10,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:00:10,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24986236] [2022-07-21 17:00:10,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:10,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:00:10,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:10,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:00:10,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:00:10,895 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:10,975 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-07-21 17:00:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:00:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 17:00:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:10,975 INFO L225 Difference]: With dead ends: 80 [2022-07-21 17:00:10,975 INFO L226 Difference]: Without dead ends: 80 [2022-07-21 17:00:10,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:00:10,976 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 208 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:10,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 64 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-21 17:00:10,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2022-07-21 17:00:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-21 17:00:10,978 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 18 [2022-07-21 17:00:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:10,978 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-21 17:00:10,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-21 17:00:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 17:00:10,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:10,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:10,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 17:00:10,979 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:10,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2001945381, now seen corresponding path program 1 times [2022-07-21 17:00:10,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:10,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699480060] [2022-07-21 17:00:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:10,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:10,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:10,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699480060] [2022-07-21 17:00:10,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699480060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:10,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:10,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:00:10,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836899389] [2022-07-21 17:00:10,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:10,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:00:10,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:10,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:00:10,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:00:10,994 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:10,999 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-07-21 17:00:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:00:10,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 17:00:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:11,000 INFO L225 Difference]: With dead ends: 62 [2022-07-21 17:00:11,000 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 17:00:11,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:00:11,001 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:11,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 17:00:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-21 17:00:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-07-21 17:00:11,002 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 18 [2022-07-21 17:00:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:11,002 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-07-21 17:00:11,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-07-21 17:00:11,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 17:00:11,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:11,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:11,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 17:00:11,003 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:11,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash 275803338, now seen corresponding path program 1 times [2022-07-21 17:00:11,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:11,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580785203] [2022-07-21 17:00:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:11,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:11,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:11,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580785203] [2022-07-21 17:00:11,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580785203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:11,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:11,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:00:11,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924404764] [2022-07-21 17:00:11,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:11,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:00:11,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:00:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:00:11,045 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:11,100 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-07-21 17:00:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:00:11,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-21 17:00:11,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:11,101 INFO L225 Difference]: With dead ends: 66 [2022-07-21 17:00:11,101 INFO L226 Difference]: Without dead ends: 63 [2022-07-21 17:00:11,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:00:11,101 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:11,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 115 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-21 17:00:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-07-21 17:00:11,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.263157894736842) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-07-21 17:00:11,103 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 20 [2022-07-21 17:00:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:11,104 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-07-21 17:00:11,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-07-21 17:00:11,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 17:00:11,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:11,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:11,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 17:00:11,105 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:11,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:11,105 INFO L85 PathProgramCache]: Analyzing trace with hash -309239812, now seen corresponding path program 1 times [2022-07-21 17:00:11,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:11,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570146479] [2022-07-21 17:00:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:11,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:11,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:11,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570146479] [2022-07-21 17:00:11,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570146479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:11,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:11,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 17:00:11,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26213900] [2022-07-21 17:00:11,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:11,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:00:11,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:00:11,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:00:11,222 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:11,474 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2022-07-21 17:00:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:00:11,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-07-21 17:00:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:11,474 INFO L225 Difference]: With dead ends: 112 [2022-07-21 17:00:11,475 INFO L226 Difference]: Without dead ends: 112 [2022-07-21 17:00:11,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:00:11,475 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:11,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 255 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:11,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-21 17:00:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2022-07-21 17:00:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-07-21 17:00:11,477 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 21 [2022-07-21 17:00:11,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:11,477 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-07-21 17:00:11,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-07-21 17:00:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 17:00:11,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:11,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:11,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 17:00:11,478 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:11,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:11,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1998183554, now seen corresponding path program 1 times [2022-07-21 17:00:11,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:11,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451765331] [2022-07-21 17:00:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:11,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:11,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:11,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451765331] [2022-07-21 17:00:11,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451765331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:11,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:11,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 17:00:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084117731] [2022-07-21 17:00:11,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:11,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:00:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:11,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:00:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:00:11,611 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:11,890 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2022-07-21 17:00:11,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 17:00:11,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-07-21 17:00:11,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:11,891 INFO L225 Difference]: With dead ends: 139 [2022-07-21 17:00:11,891 INFO L226 Difference]: Without dead ends: 139 [2022-07-21 17:00:11,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:00:11,892 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 145 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:11,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 251 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-21 17:00:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 83. [2022-07-21 17:00:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-07-21 17:00:11,894 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 21 [2022-07-21 17:00:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:11,895 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-07-21 17:00:11,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-07-21 17:00:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:00:11,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:11,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:11,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 17:00:11,896 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:11,897 INFO L85 PathProgramCache]: Analyzing trace with hash -826750037, now seen corresponding path program 1 times [2022-07-21 17:00:11,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:11,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789462570] [2022-07-21 17:00:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:11,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:11,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:11,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789462570] [2022-07-21 17:00:11,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789462570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:11,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:11,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:00:11,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484400523] [2022-07-21 17:00:11,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:11,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:00:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:00:11,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:00:11,962 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:12,019 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2022-07-21 17:00:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:00:12,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-07-21 17:00:12,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:12,020 INFO L225 Difference]: With dead ends: 95 [2022-07-21 17:00:12,020 INFO L226 Difference]: Without dead ends: 78 [2022-07-21 17:00:12,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:00:12,022 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:12,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 173 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:12,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-21 17:00:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-21 17:00:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 77 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-07-21 17:00:12,023 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 23 [2022-07-21 17:00:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:12,024 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-07-21 17:00:12,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-07-21 17:00:12,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:00:12,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:12,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:12,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-21 17:00:12,025 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:12,025 INFO L85 PathProgramCache]: Analyzing trace with hash -404048211, now seen corresponding path program 1 times [2022-07-21 17:00:12,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:12,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186627053] [2022-07-21 17:00:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:12,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:12,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:12,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186627053] [2022-07-21 17:00:12,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186627053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:12,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:12,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 17:00:12,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979601187] [2022-07-21 17:00:12,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:12,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:00:12,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:12,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:00:12,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:00:12,135 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:12,206 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-07-21 17:00:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:00:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-07-21 17:00:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:12,207 INFO L225 Difference]: With dead ends: 77 [2022-07-21 17:00:12,207 INFO L226 Difference]: Without dead ends: 65 [2022-07-21 17:00:12,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:00:12,210 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:12,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 152 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-21 17:00:12,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-07-21 17:00:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 58 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) [2022-07-21 17:00:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-07-21 17:00:12,211 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-07-21 17:00:12,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:12,212 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-07-21 17:00:12,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-07-21 17:00:12,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:00:12,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:12,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:12,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 17:00:12,213 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:12,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:12,213 INFO L85 PathProgramCache]: Analyzing trace with hash -481506431, now seen corresponding path program 1 times [2022-07-21 17:00:12,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:12,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129366015] [2022-07-21 17:00:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:12,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:12,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:12,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129366015] [2022-07-21 17:00:12,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129366015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:12,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:12,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 17:00:12,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963840605] [2022-07-21 17:00:12,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:12,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:00:12,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:12,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:00:12,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:00:12,284 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-07-21 17:00:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:12,370 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-07-21 17:00:12,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:00:12,370 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 25 [2022-07-21 17:00:12,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:12,371 INFO L225 Difference]: With dead ends: 67 [2022-07-21 17:00:12,371 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 17:00:12,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:00:12,371 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:12,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 185 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:00:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 17:00:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-21 17:00:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-07-21 17:00:12,373 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 25 [2022-07-21 17:00:12,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:12,373 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-07-21 17:00:12,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-07-21 17:00:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-07-21 17:00:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:00:12,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:12,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:12,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 17:00:12,374 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:12,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:12,375 INFO L85 PathProgramCache]: Analyzing trace with hash -262651713, now seen corresponding path program 1 times [2022-07-21 17:00:12,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:12,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027353069] [2022-07-21 17:00:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:12,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:12,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:12,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027353069] [2022-07-21 17:00:12,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027353069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:12,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:12,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 17:00:12,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269608487] [2022-07-21 17:00:12,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:12,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:00:12,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:12,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:00:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:00:12,465 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2022-07-21 17:00:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:12,574 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-07-21 17:00:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:00:12,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 25 [2022-07-21 17:00:12,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:12,587 INFO L225 Difference]: With dead ends: 63 [2022-07-21 17:00:12,587 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 17:00:12,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:00:12,589 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:12,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 164 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 17:00:12,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-07-21 17:00:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-07-21 17:00:12,590 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 25 [2022-07-21 17:00:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:12,591 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-07-21 17:00:12,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2022-07-21 17:00:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-07-21 17:00:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:00:12,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:12,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:12,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-21 17:00:12,593 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:12,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:12,593 INFO L85 PathProgramCache]: Analyzing trace with hash 838689666, now seen corresponding path program 1 times [2022-07-21 17:00:12,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:12,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746327588] [2022-07-21 17:00:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:12,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:12,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:12,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746327588] [2022-07-21 17:00:12,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746327588] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:12,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195876895] [2022-07-21 17:00:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:12,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:12,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:12,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:12,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:00:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:12,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:00:12,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:12,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:12,921 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 5 treesize of output 3 [2022-07-21 17:00:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:12,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195876895] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:12,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:12,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-07-21 17:00:12,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636706352] [2022-07-21 17:00:12,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:12,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:00:12,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:00:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:00:12,935 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 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) [2022-07-21 17:00:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:13,097 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-07-21 17:00:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:00:13,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 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 29 [2022-07-21 17:00:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:13,098 INFO L225 Difference]: With dead ends: 73 [2022-07-21 17:00:13,098 INFO L226 Difference]: Without dead ends: 69 [2022-07-21 17:00:13,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:00:13,099 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 333 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:13,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 165 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-21 17:00:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-07-21 17:00:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-21 17:00:13,106 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 29 [2022-07-21 17:00:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:13,107 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-21 17:00:13,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 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) [2022-07-21 17:00:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-21 17:00:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:00:13,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:13,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:13,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:13,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:13,326 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:13,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:13,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1473116751, now seen corresponding path program 1 times [2022-07-21 17:00:13,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:13,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746650796] [2022-07-21 17:00:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:13,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:13,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:13,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746650796] [2022-07-21 17:00:13,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746650796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:13,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243831496] [2022-07-21 17:00:13,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:13,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:13,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:13,393 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:13,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:00:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 17:00:13,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:13,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:00:13,468 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 10 treesize of output 8 [2022-07-21 17:00:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:13,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:13,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243831496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:13,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:13,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2022-07-21 17:00:13,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140633991] [2022-07-21 17:00:13,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:13,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 17:00:13,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:13,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 17:00:13,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:00:13,686 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:13,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:13,862 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2022-07-21 17:00:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:00:13,862 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 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 31 [2022-07-21 17:00:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:13,863 INFO L225 Difference]: With dead ends: 86 [2022-07-21 17:00:13,863 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 17:00:13,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:00:13,863 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 280 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:13,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 117 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 17:00:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-07-21 17:00:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2022-07-21 17:00:13,865 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 31 [2022-07-21 17:00:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:13,865 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2022-07-21 17:00:13,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:13,865 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2022-07-21 17:00:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 17:00:13,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:13,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:13,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:14,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 17:00:14,066 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:14,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:14,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1707334280, now seen corresponding path program 1 times [2022-07-21 17:00:14,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:14,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254388297] [2022-07-21 17:00:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:14,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:14,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254388297] [2022-07-21 17:00:14,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254388297] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:14,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869491223] [2022-07-21 17:00:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:14,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:14,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:14,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:14,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:00:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:14,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 17:00:14,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:14,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:14,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:00:14,213 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 10 treesize of output 8 [2022-07-21 17:00:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:14,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:14,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869491223] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:14,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:14,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-07-21 17:00:14,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250041788] [2022-07-21 17:00:14,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:14,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 17:00:14,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:14,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 17:00:14,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:00:14,501 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 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) [2022-07-21 17:00:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:14,811 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2022-07-21 17:00:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:00:14,811 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 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 33 [2022-07-21 17:00:14,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:14,812 INFO L225 Difference]: With dead ends: 80 [2022-07-21 17:00:14,812 INFO L226 Difference]: Without dead ends: 80 [2022-07-21 17:00:14,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-07-21 17:00:14,812 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 234 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:14,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 153 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-21 17:00:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2022-07-21 17:00:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:14,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2022-07-21 17:00:14,814 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 33 [2022-07-21 17:00:14,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:14,814 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2022-07-21 17:00:14,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 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) [2022-07-21 17:00:14,814 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2022-07-21 17:00:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:00:14,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:14,814 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:00:14,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:15,023 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,SelfDestructingSolverStorable27 [2022-07-21 17:00:15,023 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2102124002, now seen corresponding path program 2 times [2022-07-21 17:00:15,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:15,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963136223] [2022-07-21 17:00:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:15,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:15,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:15,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963136223] [2022-07-21 17:00:15,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963136223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:15,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722035302] [2022-07-21 17:00:15,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:15,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:15,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:15,175 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:15,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:00:15,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:15,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 17:00:15,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:15,278 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 14 treesize of output 10 [2022-07-21 17:00:15,474 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:15,474 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 18 treesize of output 18 [2022-07-21 17:00:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:15,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:15,999 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 13 [2022-07-21 17:00:16,002 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 [2022-07-21 17:00:16,006 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 26 treesize of output 22 [2022-07-21 17:00:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:16,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722035302] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:16,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:16,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2022-07-21 17:00:16,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442291590] [2022-07-21 17:00:16,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:16,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 17:00:16,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:16,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 17:00:16,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 17:00:16,023 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:16,474 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-07-21 17:00:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:00:16,475 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 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 36 [2022-07-21 17:00:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:16,476 INFO L225 Difference]: With dead ends: 93 [2022-07-21 17:00:16,476 INFO L226 Difference]: Without dead ends: 90 [2022-07-21 17:00:16,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 17:00:16,477 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 100 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:16,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 303 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-07-21 17:00:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-21 17:00:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-07-21 17:00:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 83 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-07-21 17:00:16,480 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 36 [2022-07-21 17:00:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:16,480 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-07-21 17:00:16,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-07-21 17:00:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 17:00:16,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:16,480 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:00:16,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:16,687 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,SelfDestructingSolverStorable28 [2022-07-21 17:00:16,688 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1563569052, now seen corresponding path program 1 times [2022-07-21 17:00:16,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:16,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645631561] [2022-07-21 17:00:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:16,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:16,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:16,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645631561] [2022-07-21 17:00:16,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645631561] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:16,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110787061] [2022-07-21 17:00:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:16,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:16,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:16,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:16,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 17:00:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:16,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 17:00:16,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:16,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:16,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:00:16,847 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 10 treesize of output 8 [2022-07-21 17:00:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:16,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:17,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110787061] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:17,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:17,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-07-21 17:00:17,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202179466] [2022-07-21 17:00:17,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:17,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 17:00:17,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:17,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 17:00:17,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:00:17,120 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:17,494 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2022-07-21 17:00:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:00:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 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 37 [2022-07-21 17:00:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:17,495 INFO L225 Difference]: With dead ends: 114 [2022-07-21 17:00:17,496 INFO L226 Difference]: Without dead ends: 114 [2022-07-21 17:00:17,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 17:00:17,496 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 390 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:17,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 117 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-21 17:00:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 84. [2022-07-21 17:00:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-07-21 17:00:17,498 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 37 [2022-07-21 17:00:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:17,498 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-07-21 17:00:17,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:17,498 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-07-21 17:00:17,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 17:00:17,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:17,498 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 17:00:17,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:17,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:17,708 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2117126329, now seen corresponding path program 2 times [2022-07-21 17:00:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:17,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959032587] [2022-07-21 17:00:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959032587] [2022-07-21 17:00:18,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959032587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981418017] [2022-07-21 17:00:18,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:18,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:18,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:18,032 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:18,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 17:00:18,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:18,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:18,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 17:00:18,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:18,117 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 10 treesize of output 8 [2022-07-21 17:00:18,253 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 14 treesize of output 10 [2022-07-21 17:00:18,283 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 17 treesize of output 19 [2022-07-21 17:00:18,382 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:18,382 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 15 treesize of output 10 [2022-07-21 17:00:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:18,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:18,447 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_390 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_390) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-07-21 17:00:18,464 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:18,464 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 23 treesize of output 24 [2022-07-21 17:00:18,469 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:18,469 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 37 treesize of output 37 [2022-07-21 17:00:18,472 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 [2022-07-21 17:00:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:18,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981418017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:18,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:18,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-07-21 17:00:18,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889457302] [2022-07-21 17:00:18,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:18,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 17:00:18,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:18,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 17:00:18,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=718, Unknown=1, NotChecked=54, Total=870 [2022-07-21 17:00:18,621 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:18,800 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-07-21 17:00:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:00:18,800 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 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 42 [2022-07-21 17:00:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:18,801 INFO L225 Difference]: With dead ends: 146 [2022-07-21 17:00:18,801 INFO L226 Difference]: Without dead ends: 130 [2022-07-21 17:00:18,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=922, Unknown=1, NotChecked=62, Total=1122 [2022-07-21 17:00:18,802 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:18,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 254 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-07-21 17:00:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-21 17:00:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-07-21 17:00:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 122 states have (on average 1.139344262295082) internal successors, (139), 124 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) [2022-07-21 17:00:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2022-07-21 17:00:18,804 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 42 [2022-07-21 17:00:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:18,804 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2022-07-21 17:00:18,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2022-07-21 17:00:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 17:00:18,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:18,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-21 17:00:18,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:19,011 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,SelfDestructingSolverStorable30 [2022-07-21 17:00:19,011 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:19,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1160738303, now seen corresponding path program 2 times [2022-07-21 17:00:19,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:19,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156894445] [2022-07-21 17:00:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:19,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:19,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:19,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156894445] [2022-07-21 17:00:19,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156894445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:19,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878583603] [2022-07-21 17:00:19,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:19,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:19,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:19,448 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:19,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 17:00:19,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:19,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:19,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 17:00:19,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:19,640 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 14 treesize of output 10 [2022-07-21 17:00:19,802 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 [2022-07-21 17:00:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:19,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:19,912 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 15 treesize of output 13 [2022-07-21 17:00:19,913 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 26 treesize of output 22 [2022-07-21 17:00:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:20,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878583603] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:20,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:20,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32 [2022-07-21 17:00:20,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502658674] [2022-07-21 17:00:20,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:20,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 17:00:20,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:20,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 17:00:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-07-21 17:00:20,038 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:21,045 INFO L93 Difference]: Finished difference Result 218 states and 234 transitions. [2022-07-21 17:00:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 17:00:21,046 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-21 17:00:21,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:21,047 INFO L225 Difference]: With dead ends: 218 [2022-07-21 17:00:21,047 INFO L226 Difference]: Without dead ends: 193 [2022-07-21 17:00:21,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=428, Invalid=2434, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 17:00:21,049 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 375 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:21,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 566 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 604 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-07-21 17:00:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-21 17:00:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 145. [2022-07-21 17:00:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 144 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2022-07-21 17:00:21,052 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 44 [2022-07-21 17:00:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:21,052 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2022-07-21 17:00:21,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2022-07-21 17:00:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 17:00:21,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:21,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:21,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-21 17:00:21,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:21,276 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:21,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1310015382, now seen corresponding path program 3 times [2022-07-21 17:00:21,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:21,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355260558] [2022-07-21 17:00:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:21,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:21,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:21,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355260558] [2022-07-21 17:00:21,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355260558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:21,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684226062] [2022-07-21 17:00:21,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:00:21,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:21,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:21,372 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:21,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 17:00:21,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 17:00:21,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:21,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 17:00:21,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:21,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:21,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:00:21,463 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 10 treesize of output 8 [2022-07-21 17:00:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:21,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:21,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684226062] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:21,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:21,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2022-07-21 17:00:21,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595682628] [2022-07-21 17:00:21,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:21,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:00:21,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:00:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:00:21,877 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand has 25 states, 24 states have (on average 5.416666666666667) internal successors, (130), 25 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) [2022-07-21 17:00:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:22,258 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2022-07-21 17:00:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:00:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.416666666666667) internal successors, (130), 25 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 46 [2022-07-21 17:00:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:22,259 INFO L225 Difference]: With dead ends: 203 [2022-07-21 17:00:22,259 INFO L226 Difference]: Without dead ends: 203 [2022-07-21 17:00:22,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 17:00:22,260 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 518 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:22,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 240 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:00:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-21 17:00:22,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 164. [2022-07-21 17:00:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 163 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2022-07-21 17:00:22,262 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 46 [2022-07-21 17:00:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:22,262 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2022-07-21 17:00:22,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.416666666666667) internal successors, (130), 25 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) [2022-07-21 17:00:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2022-07-21 17:00:22,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:00:22,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:22,263 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:22,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:22,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-21 17:00:22,471 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash -204836258, now seen corresponding path program 3 times [2022-07-21 17:00:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:22,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712063777] [2022-07-21 17:00:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:22,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:22,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:22,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712063777] [2022-07-21 17:00:22,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712063777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:22,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362150936] [2022-07-21 17:00:22,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:00:22,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:22,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:22,715 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:22,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 17:00:22,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 17:00:22,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:22,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 17:00:22,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:22,818 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 10 treesize of output 8 [2022-07-21 17:00:22,978 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 14 treesize of output 10 [2022-07-21 17:00:23,009 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 17 treesize of output 19 [2022-07-21 17:00:23,266 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:00:23,266 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 30 treesize of output 23 [2022-07-21 17:00:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:23,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:23,610 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (|v_ULTIMATE.start_substring_~ps2~0#1.offset_36| Int) (v_ArrVal_494 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_494))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps2~0#1.offset_36|) (not (= (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps2~0#1.offset_36| 1)) .cse1)) (= .cse1 0) (not (<= 0 |v_ULTIMATE.start_substring_~ps2~0#1.offset_36|)))))) is different from false [2022-07-21 17:00:23,618 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:23,618 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 64 treesize of output 42 [2022-07-21 17:00:23,643 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:23,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2022-07-21 17:00:23,651 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:23,651 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 68 treesize of output 64 [2022-07-21 17:00:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:23,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362150936] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:23,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:23,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-07-21 17:00:23,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210920861] [2022-07-21 17:00:23,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:23,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 17:00:23,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:23,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 17:00:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1654, Unknown=1, NotChecked=82, Total=1892 [2022-07-21 17:00:23,941 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:24,405 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2022-07-21 17:00:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 17:00:24,405 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 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 48 [2022-07-21 17:00:24,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:24,406 INFO L225 Difference]: With dead ends: 159 [2022-07-21 17:00:24,406 INFO L226 Difference]: Without dead ends: 126 [2022-07-21 17:00:24,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=362, Invalid=2833, Unknown=1, NotChecked=110, Total=3306 [2022-07-21 17:00:24,407 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 119 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:24,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 633 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 515 Invalid, 0 Unknown, 171 Unchecked, 0.1s Time] [2022-07-21 17:00:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-21 17:00:24,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-07-21 17:00:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 120 states have (on average 1.1583333333333334) internal successors, (139), 122 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) [2022-07-21 17:00:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2022-07-21 17:00:24,408 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 48 [2022-07-21 17:00:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:24,409 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2022-07-21 17:00:24,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2022-07-21 17:00:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 17:00:24,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:24,409 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-21 17:00:24,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:24,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-21 17:00:24,609 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:24,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash 532688685, now seen corresponding path program 1 times [2022-07-21 17:00:24,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:24,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131236336] [2022-07-21 17:00:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:24,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:24,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:24,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131236336] [2022-07-21 17:00:24,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131236336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:24,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723583074] [2022-07-21 17:00:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:24,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:24,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:24,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:24,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 17:00:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:24,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 17:00:24,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:24,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:24,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:00:24,797 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 10 treesize of output 8 [2022-07-21 17:00:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:24,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:25,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723583074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:25,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:25,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-07-21 17:00:25,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583709135] [2022-07-21 17:00:25,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:25,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:00:25,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:25,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:00:25,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:00:25,216 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:25,578 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-07-21 17:00:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:00:25,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 48 [2022-07-21 17:00:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:25,579 INFO L225 Difference]: With dead ends: 152 [2022-07-21 17:00:25,579 INFO L226 Difference]: Without dead ends: 152 [2022-07-21 17:00:25,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 17:00:25,580 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 548 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:25,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 197 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-21 17:00:25,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2022-07-21 17:00:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 124 states have (on average 1.153225806451613) internal successors, (143), 126 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:25,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2022-07-21 17:00:25,583 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 48 [2022-07-21 17:00:25,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:25,583 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2022-07-21 17:00:25,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2022-07-21 17:00:25,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:00:25,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:25,584 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-07-21 17:00:25,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:25,800 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,SelfDestructingSolverStorable34 [2022-07-21 17:00:25,801 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:25,801 INFO L85 PathProgramCache]: Analyzing trace with hash -575516839, now seen corresponding path program 1 times [2022-07-21 17:00:25,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:25,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067224548] [2022-07-21 17:00:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:25,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:26,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:26,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067224548] [2022-07-21 17:00:26,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067224548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:26,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588387522] [2022-07-21 17:00:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:26,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:26,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:26,167 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:26,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 17:00:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:26,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 17:00:26,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:26,279 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 14 treesize of output 10 [2022-07-21 17:00:26,566 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:26,566 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 18 treesize of output 18 [2022-07-21 17:00:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:00:26,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:27,144 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 13 [2022-07-21 17:00:27,150 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 26 treesize of output 22 [2022-07-21 17:00:27,153 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 35 treesize of output 27 [2022-07-21 17:00:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:00:27,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588387522] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:27,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:27,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 42 [2022-07-21 17:00:27,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862848017] [2022-07-21 17:00:27,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:27,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 17:00:27,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:27,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 17:00:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1597, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 17:00:27,181 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:28,460 INFO L93 Difference]: Finished difference Result 251 states and 276 transitions. [2022-07-21 17:00:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 17:00:28,461 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 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 [2022-07-21 17:00:28,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:28,461 INFO L225 Difference]: With dead ends: 251 [2022-07-21 17:00:28,461 INFO L226 Difference]: Without dead ends: 251 [2022-07-21 17:00:28,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=457, Invalid=4513, Unknown=0, NotChecked=0, Total=4970 [2022-07-21 17:00:28,463 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 174 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:28,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 590 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 944 Invalid, 0 Unknown, 316 Unchecked, 0.4s Time] [2022-07-21 17:00:28,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-21 17:00:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 212. [2022-07-21 17:00:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.1291866028708133) internal successors, (236), 211 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions. [2022-07-21 17:00:28,465 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 51 [2022-07-21 17:00:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:28,465 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions. [2022-07-21 17:00:28,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions. [2022-07-21 17:00:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:00:28,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:28,466 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:28,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:28,674 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,SelfDestructingSolverStorable35 [2022-07-21 17:00:28,674 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:28,675 INFO L85 PathProgramCache]: Analyzing trace with hash 314543995, now seen corresponding path program 4 times [2022-07-21 17:00:28,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:28,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027918433] [2022-07-21 17:00:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:28,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:28,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:28,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027918433] [2022-07-21 17:00:28,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027918433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:28,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425152083] [2022-07-21 17:00:28,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:00:28,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:28,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:28,777 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:28,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 17:00:28,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:00:28,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:28,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 17:00:28,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:28,875 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:28,875 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:00:28,880 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 10 treesize of output 8 [2022-07-21 17:00:29,073 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 16 treesize of output 12 [2022-07-21 17:00:29,107 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 19 treesize of output 21 [2022-07-21 17:00:29,504 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-21 17:00:29,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2022-07-21 17:00:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:29,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:30,162 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (v_ArrVal_604 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.offset| Int) (|v_ULTIMATE.start_substring_~ps2~0#1.offset_52| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_604))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (not (<= 0 |v_ULTIMATE.start_substring_~ps2~0#1.offset_52|)) (<= (+ |v_ULTIMATE.start_substring_~ps2~0#1.offset_52| 3) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps2~0#1.offset_52| 1)))) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps2~0#1.offset_52|) (= .cse0 0))))) is different from false [2022-07-21 17:00:30,170 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:30,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-07-21 17:00:30,185 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:30,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2022-07-21 17:00:30,193 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:30,193 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 68 treesize of output 64 [2022-07-21 17:00:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:30,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425152083] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:30,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:30,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 17] total 41 [2022-07-21 17:00:30,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699615286] [2022-07-21 17:00:30,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:30,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 17:00:30,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:30,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 17:00:30,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1479, Unknown=1, NotChecked=78, Total=1722 [2022-07-21 17:00:30,859 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand has 42 states, 41 states have (on average 3.024390243902439) internal successors, (124), 42 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:32,519 INFO L93 Difference]: Finished difference Result 238 states and 264 transitions. [2022-07-21 17:00:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:00:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.024390243902439) internal successors, (124), 42 states have internal predecessors, (124), 0 states have call successors, (0), 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 52 [2022-07-21 17:00:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:32,524 INFO L225 Difference]: With dead ends: 238 [2022-07-21 17:00:32,524 INFO L226 Difference]: Without dead ends: 238 [2022-07-21 17:00:32,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=759, Invalid=3276, Unknown=1, NotChecked=124, Total=4160 [2022-07-21 17:00:32,526 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 432 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:32,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 328 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 503 Invalid, 0 Unknown, 328 Unchecked, 0.2s Time] [2022-07-21 17:00:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-21 17:00:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 223. [2022-07-21 17:00:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 220 states have (on average 1.1318181818181818) internal successors, (249), 222 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) [2022-07-21 17:00:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 249 transitions. [2022-07-21 17:00:32,532 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 249 transitions. Word has length 52 [2022-07-21 17:00:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:32,532 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 249 transitions. [2022-07-21 17:00:32,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.024390243902439) internal successors, (124), 42 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 249 transitions. [2022-07-21 17:00:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 17:00:32,534 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:32,534 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:32,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:32,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:32,753 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:32,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1038457781, now seen corresponding path program 3 times [2022-07-21 17:00:32,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:32,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778558729] [2022-07-21 17:00:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:32,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:32,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:32,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778558729] [2022-07-21 17:00:32,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778558729] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:32,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995009643] [2022-07-21 17:00:32,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:00:32,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:32,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:32,891 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:32,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 17:00:33,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 17:00:33,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:33,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 17:00:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:33,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:33,287 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 7 treesize of output 5 [2022-07-21 17:00:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:33,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995009643] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:33,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:33,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-07-21 17:00:33,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844287821] [2022-07-21 17:00:33,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:33,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 17:00:33,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 17:00:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-07-21 17:00:33,304 INFO L87 Difference]: Start difference. First operand 223 states and 249 transitions. Second operand has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:33,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:33,748 INFO L93 Difference]: Finished difference Result 467 states and 523 transitions. [2022-07-21 17:00:33,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:00:33,748 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-21 17:00:33,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:33,749 INFO L225 Difference]: With dead ends: 467 [2022-07-21 17:00:33,749 INFO L226 Difference]: Without dead ends: 467 [2022-07-21 17:00:33,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 17:00:33,750 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 583 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:33,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 411 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:00:33,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-07-21 17:00:33,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 292. [2022-07-21 17:00:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 289 states have (on average 1.1522491349480968) internal successors, (333), 291 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 333 transitions. [2022-07-21 17:00:33,755 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 333 transitions. Word has length 55 [2022-07-21 17:00:33,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:33,755 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 333 transitions. [2022-07-21 17:00:33,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:33,755 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 333 transitions. [2022-07-21 17:00:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 17:00:33,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:33,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:33,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:33,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 17:00:33,976 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash -869737036, now seen corresponding path program 4 times [2022-07-21 17:00:33,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:33,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506102291] [2022-07-21 17:00:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:33,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:34,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:34,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506102291] [2022-07-21 17:00:34,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506102291] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:34,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642086681] [2022-07-21 17:00:34,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:00:34,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:34,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:34,463 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:00:34,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 17:00:34,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:00:34,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:34,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 17:00:34,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:34,557 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:34,558 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:00:34,886 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 [2022-07-21 17:00:34,937 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:34,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 16 treesize of output 22 [2022-07-21 17:00:34,961 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 7 treesize of output 3 [2022-07-21 17:00:36,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:00:36,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-07-21 17:00:36,711 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:00:36,711 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 20 treesize of output 18 [2022-07-21 17:00:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:36,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:37,004 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:37,004 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 21 treesize of output 22 [2022-07-21 17:00:37,009 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:37,009 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 33 treesize of output 33 [2022-07-21 17:00:37,012 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 9 treesize of output 7 [2022-07-21 17:00:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:37,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642086681] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:37,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:37,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 48 [2022-07-21 17:00:37,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457613963] [2022-07-21 17:00:37,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:37,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 17:00:37,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:37,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 17:00:37,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2053, Unknown=21, NotChecked=0, Total=2256 [2022-07-21 17:00:37,454 INFO L87 Difference]: Start difference. First operand 292 states and 333 transitions. Second operand has 48 states, 48 states have (on average 2.9375) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:38,452 INFO L93 Difference]: Finished difference Result 315 states and 356 transitions. [2022-07-21 17:00:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 17:00:38,452 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9375) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 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 57 [2022-07-21 17:00:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:38,453 INFO L225 Difference]: With dead ends: 315 [2022-07-21 17:00:38,453 INFO L226 Difference]: Without dead ends: 277 [2022-07-21 17:00:38,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=458, Invalid=4351, Unknown=21, NotChecked=0, Total=4830 [2022-07-21 17:00:38,459 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 150 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:38,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 401 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 396 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2022-07-21 17:00:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-07-21 17:00:38,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 262. [2022-07-21 17:00:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 259 states have (on average 1.162162162162162) internal successors, (301), 261 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 301 transitions. [2022-07-21 17:00:38,463 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 301 transitions. Word has length 57 [2022-07-21 17:00:38,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:38,463 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 301 transitions. [2022-07-21 17:00:38,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9375) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 301 transitions. [2022-07-21 17:00:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:00:38,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:38,464 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2022-07-21 17:00:38,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:38,681 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,SelfDestructingSolverStorable38 [2022-07-21 17:00:38,681 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:38,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:38,682 INFO L85 PathProgramCache]: Analyzing trace with hash 421187170, now seen corresponding path program 2 times [2022-07-21 17:00:38,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:38,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594271587] [2022-07-21 17:00:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:38,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:39,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:39,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594271587] [2022-07-21 17:00:39,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594271587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:39,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76183303] [2022-07-21 17:00:39,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:39,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:39,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:39,035 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) [2022-07-21 17:00:39,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 17:00:39,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:39,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:39,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 17:00:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:39,229 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 14 treesize of output 10 [2022-07-21 17:00:39,493 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 17:00:39,493 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 18 treesize of output 10 [2022-07-21 17:00:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:00:39,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:39,684 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 15 treesize of output 13 [2022-07-21 17:00:39,685 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 26 treesize of output 22 [2022-07-21 17:00:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:00:39,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76183303] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:39,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:39,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 14] total 41 [2022-07-21 17:00:39,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852015344] [2022-07-21 17:00:39,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:39,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 17:00:39,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:39,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 17:00:39,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1533, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 17:00:39,800 INFO L87 Difference]: Start difference. First operand 262 states and 301 transitions. Second operand has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 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) [2022-07-21 17:00:41,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:41,729 INFO L93 Difference]: Finished difference Result 462 states and 517 transitions. [2022-07-21 17:00:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-21 17:00:41,730 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 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) Word has length 59 [2022-07-21 17:00:41,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:41,731 INFO L225 Difference]: With dead ends: 462 [2022-07-21 17:00:41,731 INFO L226 Difference]: Without dead ends: 456 [2022-07-21 17:00:41,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=499, Invalid=6307, Unknown=0, NotChecked=0, Total=6806 [2022-07-21 17:00:41,733 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 136 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:41,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 930 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1481 Invalid, 0 Unknown, 143 Unchecked, 0.5s Time] [2022-07-21 17:00:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-07-21 17:00:41,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 365. [2022-07-21 17:00:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 362 states have (on average 1.1519337016574585) internal successors, (417), 364 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:41,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 417 transitions. [2022-07-21 17:00:41,742 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 417 transitions. Word has length 59 [2022-07-21 17:00:41,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:41,742 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 417 transitions. [2022-07-21 17:00:41,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 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) [2022-07-21 17:00:41,743 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 417 transitions. [2022-07-21 17:00:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:00:41,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:41,743 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2022-07-21 17:00:41,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:41,944 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,SelfDestructingSolverStorable39 [2022-07-21 17:00:41,944 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:41,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1826839330, now seen corresponding path program 3 times [2022-07-21 17:00:41,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:41,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15640966] [2022-07-21 17:00:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:41,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:42,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:42,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15640966] [2022-07-21 17:00:42,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15640966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:42,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212412617] [2022-07-21 17:00:42,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:00:42,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:42,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:42,116 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) [2022-07-21 17:00:42,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 17:00:42,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 17:00:42,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:42,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:00:42,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:42,219 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:42,219 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:00:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 17:00:42,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 17:00:42,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212412617] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:42,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:42,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-07-21 17:00:42,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976583108] [2022-07-21 17:00:42,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:42,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 17:00:42,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:42,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 17:00:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-07-21 17:00:42,633 INFO L87 Difference]: Start difference. First operand 365 states and 417 transitions. Second operand has 28 states, 28 states have (on average 5.25) internal successors, (147), 28 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:43,815 INFO L93 Difference]: Finished difference Result 581 states and 650 transitions. [2022-07-21 17:00:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 17:00:43,816 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.25) internal successors, (147), 28 states have internal predecessors, (147), 0 states have call successors, (0), 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 [2022-07-21 17:00:43,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:43,817 INFO L225 Difference]: With dead ends: 581 [2022-07-21 17:00:43,817 INFO L226 Difference]: Without dead ends: 579 [2022-07-21 17:00:43,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=709, Invalid=2831, Unknown=0, NotChecked=0, Total=3540 [2022-07-21 17:00:43,818 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 555 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:43,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 506 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:00:43,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-07-21 17:00:43,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 426. [2022-07-21 17:00:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 423 states have (on average 1.1442080378250592) internal successors, (484), 425 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 484 transitions. [2022-07-21 17:00:43,835 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 484 transitions. Word has length 59 [2022-07-21 17:00:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:43,835 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 484 transitions. [2022-07-21 17:00:43,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.25) internal successors, (147), 28 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 484 transitions. [2022-07-21 17:00:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 17:00:43,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:43,836 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:43,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:44,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:44,053 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:44,053 INFO L85 PathProgramCache]: Analyzing trace with hash 723375223, now seen corresponding path program 5 times [2022-07-21 17:00:44,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:44,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540331451] [2022-07-21 17:00:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:44,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:44,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:44,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540331451] [2022-07-21 17:00:44,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540331451] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:44,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837469693] [2022-07-21 17:00:44,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:00:44,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:44,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:44,360 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) [2022-07-21 17:00:44,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 17:00:44,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 17:00:44,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:44,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 17:00:44,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:44,460 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 10 treesize of output 8 [2022-07-21 17:00:44,617 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 14 treesize of output 10 [2022-07-21 17:00:44,649 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 17 treesize of output 19 [2022-07-21 17:00:44,772 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:44,772 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 15 treesize of output 10 [2022-07-21 17:00:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:44,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:44,851 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_787) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:00:44,855 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:44,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 17:00:44,859 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:44,859 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 37 treesize of output 37 [2022-07-21 17:00:44,862 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 [2022-07-21 17:00:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:45,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837469693] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:45,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:45,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 35 [2022-07-21 17:00:45,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896379965] [2022-07-21 17:00:45,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:45,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 17:00:45,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 17:00:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1022, Unknown=1, NotChecked=64, Total=1190 [2022-07-21 17:00:45,020 INFO L87 Difference]: Start difference. First operand 426 states and 484 transitions. Second operand has 35 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 35 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:45,328 INFO L93 Difference]: Finished difference Result 474 states and 529 transitions. [2022-07-21 17:00:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:00:45,329 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 35 states have internal predecessors, (129), 0 states have call successors, (0), 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 61 [2022-07-21 17:00:45,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:45,330 INFO L225 Difference]: With dead ends: 474 [2022-07-21 17:00:45,330 INFO L226 Difference]: Without dead ends: 426 [2022-07-21 17:00:45,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1340, Unknown=1, NotChecked=74, Total=1560 [2022-07-21 17:00:45,330 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 93 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:45,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 590 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 642 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-07-21 17:00:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-07-21 17:00:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 400. [2022-07-21 17:00:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 397 states have (on average 1.1360201511335013) internal successors, (451), 399 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:45,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 451 transitions. [2022-07-21 17:00:45,335 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 451 transitions. Word has length 61 [2022-07-21 17:00:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:45,335 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 451 transitions. [2022-07-21 17:00:45,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 35 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:45,336 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 451 transitions. [2022-07-21 17:00:45,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 17:00:45,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:45,336 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:45,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:45,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:45,555 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:45,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:45,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1359597257, now seen corresponding path program 6 times [2022-07-21 17:00:45,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:45,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212818115] [2022-07-21 17:00:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:45,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:45,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:45,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212818115] [2022-07-21 17:00:45,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212818115] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:45,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621369542] [2022-07-21 17:00:45,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:00:45,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:45,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:45,720 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) [2022-07-21 17:00:45,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 17:00:45,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 17:00:45,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:45,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 17:00:45,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:46,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:46,207 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 7 treesize of output 5 [2022-07-21 17:00:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:46,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621369542] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:46,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:46,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-07-21 17:00:46,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230179135] [2022-07-21 17:00:46,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:46,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 17:00:46,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:46,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 17:00:46,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:00:46,246 INFO L87 Difference]: Start difference. First operand 400 states and 451 transitions. Second operand has 29 states, 28 states have (on average 5.535714285714286) internal successors, (155), 29 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:46,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:46,653 INFO L93 Difference]: Finished difference Result 637 states and 716 transitions. [2022-07-21 17:00:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:00:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.535714285714286) internal successors, (155), 29 states have internal predecessors, (155), 0 states have call successors, (0), 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 61 [2022-07-21 17:00:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:46,655 INFO L225 Difference]: With dead ends: 637 [2022-07-21 17:00:46,655 INFO L226 Difference]: Without dead ends: 637 [2022-07-21 17:00:46,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=346, Invalid=1214, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 17:00:46,656 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 724 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:46,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 327 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:00:46,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-07-21 17:00:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 506. [2022-07-21 17:00:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 503 states have (on average 1.1451292246520874) internal successors, (576), 505 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 576 transitions. [2022-07-21 17:00:46,661 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 576 transitions. Word has length 61 [2022-07-21 17:00:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:46,661 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 576 transitions. [2022-07-21 17:00:46,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.535714285714286) internal successors, (155), 29 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 576 transitions. [2022-07-21 17:00:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 17:00:46,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:46,662 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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] [2022-07-21 17:00:46,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:46,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-07-21 17:00:46,875 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:46,876 INFO L85 PathProgramCache]: Analyzing trace with hash 123652268, now seen corresponding path program 2 times [2022-07-21 17:00:46,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:46,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167364018] [2022-07-21 17:00:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:46,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:46,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:46,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167364018] [2022-07-21 17:00:46,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167364018] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:46,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860896059] [2022-07-21 17:00:46,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:46,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:46,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:46,971 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) [2022-07-21 17:00:46,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 17:00:47,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:47,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:47,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:00:47,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:47,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:47,392 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 5 treesize of output 3 [2022-07-21 17:00:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:47,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860896059] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:47,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:47,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-07-21 17:00:47,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581984364] [2022-07-21 17:00:47,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:47,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 17:00:47,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:47,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 17:00:47,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:00:47,410 INFO L87 Difference]: Start difference. First operand 506 states and 576 transitions. Second operand has 23 states, 22 states have (on average 5.454545454545454) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:47,755 INFO L93 Difference]: Finished difference Result 641 states and 718 transitions. [2022-07-21 17:00:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:00:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.454545454545454) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-21 17:00:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:47,758 INFO L225 Difference]: With dead ends: 641 [2022-07-21 17:00:47,758 INFO L226 Difference]: Without dead ends: 641 [2022-07-21 17:00:47,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2022-07-21 17:00:47,759 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 364 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:47,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 232 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-07-21 17:00:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 535. [2022-07-21 17:00:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 532 states have (on average 1.1428571428571428) internal successors, (608), 534 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 608 transitions. [2022-07-21 17:00:47,766 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 608 transitions. Word has length 62 [2022-07-21 17:00:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:47,768 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 608 transitions. [2022-07-21 17:00:47,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.454545454545454) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 608 transitions. [2022-07-21 17:00:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 17:00:47,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:47,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:47,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:47,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-21 17:00:47,996 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:47,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:47,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1748804299, now seen corresponding path program 4 times [2022-07-21 17:00:47,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:47,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721162877] [2022-07-21 17:00:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:47,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:48,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:48,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721162877] [2022-07-21 17:00:48,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721162877] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:48,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373842785] [2022-07-21 17:00:48,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:00:48,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:48,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:48,112 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) [2022-07-21 17:00:48,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 17:00:48,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:00:48,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:48,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 17:00:48,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:48,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:00:48,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:00:48,221 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 10 treesize of output 8 [2022-07-21 17:00:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:48,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 31 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:48,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373842785] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:48,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:48,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-07-21 17:00:48,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515456419] [2022-07-21 17:00:48,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:48,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 17:00:48,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:48,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 17:00:48,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:00:48,577 INFO L87 Difference]: Start difference. First operand 535 states and 608 transitions. Second operand has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 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) [2022-07-21 17:00:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:48,889 INFO L93 Difference]: Finished difference Result 545 states and 614 transitions. [2022-07-21 17:00:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 17:00:48,890 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 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 62 [2022-07-21 17:00:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:48,891 INFO L225 Difference]: With dead ends: 545 [2022-07-21 17:00:48,891 INFO L226 Difference]: Without dead ends: 510 [2022-07-21 17:00:48,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 17:00:48,892 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 221 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:48,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 234 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:00:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-07-21 17:00:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 504. [2022-07-21 17:00:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 501 states have (on average 1.1477045908183632) internal successors, (575), 503 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 575 transitions. [2022-07-21 17:00:48,896 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 575 transitions. Word has length 62 [2022-07-21 17:00:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:48,896 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 575 transitions. [2022-07-21 17:00:48,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 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) [2022-07-21 17:00:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 575 transitions. [2022-07-21 17:00:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:00:48,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:48,897 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:48,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:49,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:49,111 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:49,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:49,112 INFO L85 PathProgramCache]: Analyzing trace with hash -869581682, now seen corresponding path program 4 times [2022-07-21 17:00:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:49,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19026985] [2022-07-21 17:00:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:49,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:49,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:49,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19026985] [2022-07-21 17:00:49,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19026985] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:49,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931161981] [2022-07-21 17:00:49,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:00:49,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:49,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:49,245 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) [2022-07-21 17:00:49,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 17:00:49,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:00:49,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 17:00:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:49,385 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:49,386 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:00:49,496 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 [2022-07-21 17:00:49,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:00:49,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 17:00:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 17:00:49,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:50,076 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 13 treesize of output 11 [2022-07-21 17:00:50,079 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 20 treesize of output 18 [2022-07-21 17:00:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 17:00:50,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931161981] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:50,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:50,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-07-21 17:00:50,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118619710] [2022-07-21 17:00:50,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:50,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 17:00:50,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:50,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 17:00:50,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2022-07-21 17:00:50,318 INFO L87 Difference]: Start difference. First operand 504 states and 575 transitions. Second operand has 32 states, 32 states have (on average 4.28125) internal successors, (137), 32 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) [2022-07-21 17:00:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:51,222 INFO L93 Difference]: Finished difference Result 494 states and 554 transitions. [2022-07-21 17:00:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 17:00:51,223 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.28125) internal successors, (137), 32 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) Word has length 63 [2022-07-21 17:00:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:51,224 INFO L225 Difference]: With dead ends: 494 [2022-07-21 17:00:51,224 INFO L226 Difference]: Without dead ends: 485 [2022-07-21 17:00:51,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=488, Invalid=3672, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 17:00:51,225 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 128 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:51,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 667 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 652 Invalid, 0 Unknown, 432 Unchecked, 0.2s Time] [2022-07-21 17:00:51,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-07-21 17:00:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 475. [2022-07-21 17:00:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 472 states have (on average 1.1334745762711864) internal successors, (535), 474 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 535 transitions. [2022-07-21 17:00:51,230 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 535 transitions. Word has length 63 [2022-07-21 17:00:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:51,230 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 535 transitions. [2022-07-21 17:00:51,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.28125) internal successors, (137), 32 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) [2022-07-21 17:00:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 535 transitions. [2022-07-21 17:00:51,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 17:00:51,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:51,230 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 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] [2022-07-21 17:00:51,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:51,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:51,467 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:51,468 INFO L85 PathProgramCache]: Analyzing trace with hash 876255922, now seen corresponding path program 5 times [2022-07-21 17:00:51,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:51,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937212317] [2022-07-21 17:00:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:51,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 17:00:51,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:51,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937212317] [2022-07-21 17:00:51,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937212317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:51,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807568812] [2022-07-21 17:00:51,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:00:51,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:51,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:51,675 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) [2022-07-21 17:00:51,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 17:00:51,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 17:00:51,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:51,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 17:00:51,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:51,873 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 14 treesize of output 10 [2022-07-21 17:00:52,115 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 17:00:52,116 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 18 treesize of output 10 [2022-07-21 17:00:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:52,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:52,253 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 13 [2022-07-21 17:00:52,254 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 26 treesize of output 22 [2022-07-21 17:00:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:52,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807568812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:52,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:52,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 36 [2022-07-21 17:00:52,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623614118] [2022-07-21 17:00:52,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:52,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 17:00:52,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 17:00:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 17:00:52,335 INFO L87 Difference]: Start difference. First operand 475 states and 535 transitions. Second operand has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:53,073 INFO L93 Difference]: Finished difference Result 455 states and 497 transitions. [2022-07-21 17:00:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 17:00:53,073 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-21 17:00:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:53,074 INFO L225 Difference]: With dead ends: 455 [2022-07-21 17:00:53,074 INFO L226 Difference]: Without dead ends: 399 [2022-07-21 17:00:53,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=339, Invalid=4083, Unknown=0, NotChecked=0, Total=4422 [2022-07-21 17:00:53,078 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 70 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:53,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 829 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 596 Invalid, 0 Unknown, 251 Unchecked, 0.1s Time] [2022-07-21 17:00:53,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-21 17:00:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 331. [2022-07-21 17:00:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 328 states have (on average 1.1310975609756098) internal successors, (371), 330 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 371 transitions. [2022-07-21 17:00:53,084 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 371 transitions. Word has length 66 [2022-07-21 17:00:53,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:53,084 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 371 transitions. [2022-07-21 17:00:53,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 371 transitions. [2022-07-21 17:00:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 17:00:53,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:53,085 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:53,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-21 17:00:53,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-21 17:00:53,299 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:53,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:53,300 INFO L85 PathProgramCache]: Analyzing trace with hash -287521902, now seen corresponding path program 5 times [2022-07-21 17:00:53,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:53,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459770745] [2022-07-21 17:00:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:53,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:53,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:53,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459770745] [2022-07-21 17:00:53,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459770745] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:53,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925651638] [2022-07-21 17:00:53,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:00:53,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:53,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:53,586 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) [2022-07-21 17:00:53,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 17:00:53,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 17:00:53,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:53,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 17:00:53,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:53,815 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 14 treesize of output 10 [2022-07-21 17:00:54,100 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 17:00:54,100 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 18 treesize of output 10 [2022-07-21 17:00:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:54,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:54,291 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 13 [2022-07-21 17:00:54,293 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 26 treesize of output 22 [2022-07-21 17:00:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:00:54,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925651638] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:54,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:54,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 41 [2022-07-21 17:00:54,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949392309] [2022-07-21 17:00:54,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:54,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 17:00:54,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 17:00:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1537, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 17:00:54,408 INFO L87 Difference]: Start difference. First operand 331 states and 371 transitions. Second operand has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 41 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:56,327 INFO L93 Difference]: Finished difference Result 761 states and 838 transitions. [2022-07-21 17:00:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-21 17:00:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 41 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-21 17:00:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:56,329 INFO L225 Difference]: With dead ends: 761 [2022-07-21 17:00:56,329 INFO L226 Difference]: Without dead ends: 755 [2022-07-21 17:00:56,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=640, Invalid=7916, Unknown=0, NotChecked=0, Total=8556 [2022-07-21 17:00:56,332 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 577 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 2947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 566 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:56,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1387 Invalid, 2947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2308 Invalid, 0 Unknown, 566 Unchecked, 0.7s Time] [2022-07-21 17:00:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-07-21 17:00:56,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 395. [2022-07-21 17:00:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 392 states have (on average 1.1326530612244898) internal successors, (444), 394 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 444 transitions. [2022-07-21 17:00:56,337 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 444 transitions. Word has length 66 [2022-07-21 17:00:56,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:56,337 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 444 transitions. [2022-07-21 17:00:56,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 41 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 444 transitions. [2022-07-21 17:00:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 17:00:56,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:56,338 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:56,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-21 17:00:56,560 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,SelfDestructingSolverStorable47 [2022-07-21 17:00:56,560 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:56,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:56,560 INFO L85 PathProgramCache]: Analyzing trace with hash 850414963, now seen corresponding path program 7 times [2022-07-21 17:00:56,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:56,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904033401] [2022-07-21 17:00:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:56,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:00:56,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:56,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904033401] [2022-07-21 17:00:56,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904033401] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:56,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37377738] [2022-07-21 17:00:56,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:00:56,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:56,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:56,729 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) [2022-07-21 17:00:56,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 17:00:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:56,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 17:00:56,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:56,848 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:00:56,848 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:00:57,084 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 14 treesize of output 10 [2022-07-21 17:00:57,089 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:00:57,089 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 13 treesize of output 13 [2022-07-21 17:00:57,101 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 [2022-07-21 17:00:57,248 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:57,249 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 15 treesize of output 10 [2022-07-21 17:00:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:57,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:57,387 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_substring_~ps~0#1.offset_74| Int) (v_ArrVal_1053 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps~0#1.offset_74|) (not (<= 0 |v_ULTIMATE.start_substring_~ps~0#1.offset_74|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1053) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_74| 3)) 0))) is different from false [2022-07-21 17:00:57,394 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:57,395 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 23 treesize of output 24 [2022-07-21 17:00:57,401 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:57,401 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 37 treesize of output 37 [2022-07-21 17:00:57,404 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 [2022-07-21 17:00:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:58,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37377738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:58,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:00:58,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19] total 42 [2022-07-21 17:00:58,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641559337] [2022-07-21 17:00:58,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:58,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 17:00:58,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:00:58,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 17:00:58,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1508, Unknown=1, NotChecked=78, Total=1722 [2022-07-21 17:00:58,120 INFO L87 Difference]: Start difference. First operand 395 states and 444 transitions. Second operand has 42 states, 42 states have (on average 3.6904761904761907) internal successors, (155), 42 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:58,733 INFO L93 Difference]: Finished difference Result 627 states and 691 transitions. [2022-07-21 17:00:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:00:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.6904761904761907) internal successors, (155), 42 states have internal predecessors, (155), 0 states have call successors, (0), 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 72 [2022-07-21 17:00:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:58,734 INFO L225 Difference]: With dead ends: 627 [2022-07-21 17:00:58,735 INFO L226 Difference]: Without dead ends: 563 [2022-07-21 17:00:58,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=343, Invalid=3317, Unknown=4, NotChecked=118, Total=3782 [2022-07-21 17:00:58,735 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 185 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:58,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 730 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 739 Invalid, 0 Unknown, 374 Unchecked, 0.2s Time] [2022-07-21 17:00:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-07-21 17:00:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 556. [2022-07-21 17:00:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 553 states have (on average 1.1157323688969258) internal successors, (617), 555 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 617 transitions. [2022-07-21 17:00:58,741 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 617 transitions. Word has length 72 [2022-07-21 17:00:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:58,741 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 617 transitions. [2022-07-21 17:00:58,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.6904761904761907) internal successors, (155), 42 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 617 transitions. [2022-07-21 17:00:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 17:00:58,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:58,742 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:58,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:58,954 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,SelfDestructingSolverStorable48 [2022-07-21 17:00:58,955 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:00:58,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash 779597011, now seen corresponding path program 6 times [2022-07-21 17:00:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:00:58,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112324306] [2022-07-21 17:00:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:00:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 17:00:59,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:00:59,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112324306] [2022-07-21 17:00:59,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112324306] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:00:59,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413319181] [2022-07-21 17:00:59,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:00:59,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:00:59,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:00:59,066 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) [2022-07-21 17:00:59,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 17:00:59,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 17:00:59,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:59,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 17:00:59,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:59,472 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 14 treesize of output 10 [2022-07-21 17:00:59,853 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:00:59,853 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 19 treesize of output 19 [2022-07-21 17:01:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:01:00,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:00,407 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 13 [2022-07-21 17:01:00,410 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 26 treesize of output 22 [2022-07-21 17:01:00,442 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 [2022-07-21 17:01:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:01:00,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413319181] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:00,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:00,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 20] total 50 [2022-07-21 17:01:00,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962505663] [2022-07-21 17:01:00,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:00,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 17:01:00,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:00,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 17:01:00,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 17:01:00,715 INFO L87 Difference]: Start difference. First operand 556 states and 617 transitions. Second operand has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:01,816 INFO L93 Difference]: Finished difference Result 823 states and 902 transitions. [2022-07-21 17:01:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 17:01:01,816 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 0 states have call successors, (0), 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 74 [2022-07-21 17:01:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:01,818 INFO L225 Difference]: With dead ends: 823 [2022-07-21 17:01:01,818 INFO L226 Difference]: Without dead ends: 789 [2022-07-21 17:01:01,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=776, Invalid=6196, Unknown=0, NotChecked=0, Total=6972 [2022-07-21 17:01:01,832 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 260 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:01,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 970 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 562 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-07-21 17:01:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-07-21 17:01:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 647. [2022-07-21 17:01:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 644 states have (on average 1.1195652173913044) internal successors, (721), 646 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 721 transitions. [2022-07-21 17:01:01,857 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 721 transitions. Word has length 74 [2022-07-21 17:01:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:01,857 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 721 transitions. [2022-07-21 17:01:01,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 721 transitions. [2022-07-21 17:01:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 17:01:01,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:01,858 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:01,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:02,059 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,SelfDestructingSolverStorable49 [2022-07-21 17:01:02,059 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1176796164, now seen corresponding path program 7 times [2022-07-21 17:01:02,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:02,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70726428] [2022-07-21 17:01:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:02,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 25 proven. 59 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:01:02,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:02,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70726428] [2022-07-21 17:01:02,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70726428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:02,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702248525] [2022-07-21 17:01:02,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:01:02,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:02,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:02,360 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) [2022-07-21 17:01:02,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 17:01:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:02,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 17:01:02,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:02,579 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 14 treesize of output 10 [2022-07-21 17:01:02,892 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 17:01:02,892 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 18 treesize of output 10 [2022-07-21 17:01:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 17:01:02,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:03,052 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 13 [2022-07-21 17:01:03,059 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 26 treesize of output 22 [2022-07-21 17:01:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 17:01:03,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702248525] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:03,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:03,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 42 [2022-07-21 17:01:03,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155495865] [2022-07-21 17:01:03,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:03,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 17:01:03,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:03,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 17:01:03,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1616, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 17:01:03,179 INFO L87 Difference]: Start difference. First operand 647 states and 721 transitions. Second operand has 42 states, 42 states have (on average 4.0) internal successors, (168), 42 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:05,637 INFO L93 Difference]: Finished difference Result 941 states and 1021 transitions. [2022-07-21 17:01:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-21 17:01:05,637 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.0) internal successors, (168), 42 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-21 17:01:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:05,639 INFO L225 Difference]: With dead ends: 941 [2022-07-21 17:01:05,639 INFO L226 Difference]: Without dead ends: 927 [2022-07-21 17:01:05,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 125 SyntacticMatches, 7 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=751, Invalid=8951, Unknown=0, NotChecked=0, Total=9702 [2022-07-21 17:01:05,641 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 563 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 454 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:05,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 1831 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2840 Invalid, 0 Unknown, 454 Unchecked, 0.8s Time] [2022-07-21 17:01:05,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-07-21 17:01:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 778. [2022-07-21 17:01:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 775 states have (on average 1.112258064516129) internal successors, (862), 777 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 862 transitions. [2022-07-21 17:01:05,665 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 862 transitions. Word has length 74 [2022-07-21 17:01:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:05,665 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 862 transitions. [2022-07-21 17:01:05,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.0) internal successors, (168), 42 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:05,667 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 862 transitions. [2022-07-21 17:01:05,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 17:01:05,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:05,670 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:05,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:05,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:05,887 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:05,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1703030388, now seen corresponding path program 6 times [2022-07-21 17:01:05,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:05,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227152089] [2022-07-21 17:01:05,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:05,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:06,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227152089] [2022-07-21 17:01:06,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227152089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954388661] [2022-07-21 17:01:06,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:01:06,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:06,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:06,107 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) [2022-07-21 17:01:06,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 17:01:06,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 17:01:06,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:06,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 17:01:06,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:06,261 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:01:06,262 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:01:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:06,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:07,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954388661] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:07,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:07,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2022-07-21 17:01:07,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179902267] [2022-07-21 17:01:07,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:07,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 17:01:07,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:07,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 17:01:07,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 17:01:07,013 INFO L87 Difference]: Start difference. First operand 778 states and 862 transitions. Second operand has 41 states, 40 states have (on average 4.45) internal successors, (178), 41 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:07,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:07,733 INFO L93 Difference]: Finished difference Result 1167 states and 1291 transitions. [2022-07-21 17:01:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:01:07,734 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.45) internal successors, (178), 41 states have internal predecessors, (178), 0 states have call successors, (0), 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 74 [2022-07-21 17:01:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:07,736 INFO L225 Difference]: With dead ends: 1167 [2022-07-21 17:01:07,736 INFO L226 Difference]: Without dead ends: 1167 [2022-07-21 17:01:07,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=588, Invalid=2274, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 17:01:07,737 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 634 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:07,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 533 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:01:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-07-21 17:01:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 968. [2022-07-21 17:01:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 965 states have (on average 1.1264248704663213) internal successors, (1087), 967 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1087 transitions. [2022-07-21 17:01:07,745 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1087 transitions. Word has length 74 [2022-07-21 17:01:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:07,745 INFO L495 AbstractCegarLoop]: Abstraction has 968 states and 1087 transitions. [2022-07-21 17:01:07,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.45) internal successors, (178), 41 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1087 transitions. [2022-07-21 17:01:07,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 17:01:07,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:07,746 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:07,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:07,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:07,961 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:07,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1960256400, now seen corresponding path program 8 times [2022-07-21 17:01:07,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:07,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340409311] [2022-07-21 17:01:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:07,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:08,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:08,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340409311] [2022-07-21 17:01:08,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340409311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:08,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171998505] [2022-07-21 17:01:08,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:01:08,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:08,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:08,116 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) [2022-07-21 17:01:08,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 17:01:08,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:01:08,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 17:01:08,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:08,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:08,573 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 5 treesize of output 3 [2022-07-21 17:01:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:08,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171998505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:08,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:08,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2022-07-21 17:01:08,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536813121] [2022-07-21 17:01:08,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:08,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 17:01:08,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:08,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 17:01:08,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-07-21 17:01:08,593 INFO L87 Difference]: Start difference. First operand 968 states and 1087 transitions. Second operand has 28 states, 27 states have (on average 6.0) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:08,867 INFO L93 Difference]: Finished difference Result 1229 states and 1384 transitions. [2022-07-21 17:01:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:01:08,868 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 6.0) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-21 17:01:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:08,871 INFO L225 Difference]: With dead ends: 1229 [2022-07-21 17:01:08,871 INFO L226 Difference]: Without dead ends: 1229 [2022-07-21 17:01:08,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 17:01:08,872 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 388 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:08,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 534 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:01:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-07-21 17:01:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1095. [2022-07-21 17:01:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1092 states have (on average 1.1336996336996337) internal successors, (1238), 1094 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1238 transitions. [2022-07-21 17:01:08,880 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1238 transitions. Word has length 76 [2022-07-21 17:01:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:08,881 INFO L495 AbstractCegarLoop]: Abstraction has 1095 states and 1238 transitions. [2022-07-21 17:01:08,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 6.0) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1238 transitions. [2022-07-21 17:01:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 17:01:08,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:08,882 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:08,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:09,099 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,SelfDestructingSolverStorable52 [2022-07-21 17:01:09,099 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:09,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:09,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1781498856, now seen corresponding path program 8 times [2022-07-21 17:01:09,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:09,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143325312] [2022-07-21 17:01:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:09,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:09,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:09,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143325312] [2022-07-21 17:01:09,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143325312] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:09,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195554978] [2022-07-21 17:01:09,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:01:09,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:09,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:09,515 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) [2022-07-21 17:01:09,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 17:01:09,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:01:09,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:09,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-21 17:01:09,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:09,649 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 10 treesize of output 8 [2022-07-21 17:01:09,845 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 14 treesize of output 10 [2022-07-21 17:01:09,881 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 17 treesize of output 19 [2022-07-21 17:01:10,145 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:01:10,145 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 30 treesize of output 23 [2022-07-21 17:01:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:10,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:10,288 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1274 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1274) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:01:10,296 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:10,296 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 23 treesize of output 24 [2022-07-21 17:01:10,299 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:10,299 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 37 treesize of output 37 [2022-07-21 17:01:10,302 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 [2022-07-21 17:01:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:10,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195554978] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:10,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:10,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 44 [2022-07-21 17:01:10,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772819828] [2022-07-21 17:01:10,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:10,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 17:01:10,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 17:01:10,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1686, Unknown=1, NotChecked=82, Total=1892 [2022-07-21 17:01:10,464 INFO L87 Difference]: Start difference. First operand 1095 states and 1238 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 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) [2022-07-21 17:01:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:11,237 INFO L93 Difference]: Finished difference Result 1099 states and 1234 transitions. [2022-07-21 17:01:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:01:11,237 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 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 78 [2022-07-21 17:01:11,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:11,239 INFO L225 Difference]: With dead ends: 1099 [2022-07-21 17:01:11,239 INFO L226 Difference]: Without dead ends: 995 [2022-07-21 17:01:11,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=386, Invalid=3399, Unknown=1, NotChecked=120, Total=3906 [2022-07-21 17:01:11,240 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 376 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:11,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 824 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1081 Invalid, 0 Unknown, 170 Unchecked, 0.3s Time] [2022-07-21 17:01:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-07-21 17:01:11,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 951. [2022-07-21 17:01:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 948 states have (on average 1.140295358649789) internal successors, (1081), 950 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1081 transitions. [2022-07-21 17:01:11,271 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1081 transitions. Word has length 78 [2022-07-21 17:01:11,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:11,271 INFO L495 AbstractCegarLoop]: Abstraction has 951 states and 1081 transitions. [2022-07-21 17:01:11,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 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) [2022-07-21 17:01:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1081 transitions. [2022-07-21 17:01:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 17:01:11,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:11,272 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:11,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:11,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:11,491 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:11,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1662372974, now seen corresponding path program 5 times [2022-07-21 17:01:11,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:11,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922163449] [2022-07-21 17:01:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:11,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:11,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922163449] [2022-07-21 17:01:11,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922163449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471181020] [2022-07-21 17:01:11,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:01:11,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:11,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:11,614 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) [2022-07-21 17:01:11,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 17:01:11,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 17:01:11,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:11,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 17:01:11,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:01:11,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:01:11,773 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 10 treesize of output 8 [2022-07-21 17:01:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:12,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:12,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471181020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:12,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:12,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-07-21 17:01:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252564922] [2022-07-21 17:01:12,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:12,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 17:01:12,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 17:01:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 17:01:12,343 INFO L87 Difference]: Start difference. First operand 951 states and 1081 transitions. Second operand has 33 states, 32 states have (on average 5.625) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:12,971 INFO L93 Difference]: Finished difference Result 981 states and 1108 transitions. [2022-07-21 17:01:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:01:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.625) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 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 78 [2022-07-21 17:01:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:12,973 INFO L225 Difference]: With dead ends: 981 [2022-07-21 17:01:12,973 INFO L226 Difference]: Without dead ends: 981 [2022-07-21 17:01:12,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=492, Invalid=1860, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 17:01:12,995 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 320 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:12,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 493 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:01:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-07-21 17:01:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 955. [2022-07-21 17:01:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 952 states have (on average 1.1397058823529411) internal successors, (1085), 954 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1085 transitions. [2022-07-21 17:01:13,003 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1085 transitions. Word has length 78 [2022-07-21 17:01:13,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:13,004 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 1085 transitions. [2022-07-21 17:01:13,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.625) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1085 transitions. [2022-07-21 17:01:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 17:01:13,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:13,010 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:13,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:13,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:13,210 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:13,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:13,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1715458345, now seen corresponding path program 9 times [2022-07-21 17:01:13,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:13,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833649858] [2022-07-21 17:01:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:13,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 1 proven. 103 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 17:01:13,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833649858] [2022-07-21 17:01:13,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833649858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:13,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597749997] [2022-07-21 17:01:13,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:01:13,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:13,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:13,330 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) [2022-07-21 17:01:13,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 17:01:13,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 17:01:13,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:13,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-21 17:01:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:13,460 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 10 treesize of output 8 [2022-07-21 17:01:13,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:01:13,548 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 16 treesize of output 12 [2022-07-21 17:01:13,565 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 19 treesize of output 21 [2022-07-21 17:01:13,958 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:13,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2022-07-21 17:01:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 17:01:14,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:14,778 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:14,779 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 26 treesize of output 27 [2022-07-21 17:01:14,783 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:14,783 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 44 treesize of output 44 [2022-07-21 17:01:14,787 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:14,787 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 32 treesize of output 32 [2022-07-21 17:01:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 17:01:14,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597749997] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:14,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:14,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 16] total 40 [2022-07-21 17:01:14,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9393567] [2022-07-21 17:01:14,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:14,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 17:01:14,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:14,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 17:01:14,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 17:01:14,932 INFO L87 Difference]: Start difference. First operand 955 states and 1085 transitions. Second operand has 41 states, 40 states have (on average 4.275) internal successors, (171), 41 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:17,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:17,023 INFO L93 Difference]: Finished difference Result 1088 states and 1210 transitions. [2022-07-21 17:01:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-21 17:01:17,023 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.275) internal successors, (171), 41 states have internal predecessors, (171), 0 states have call successors, (0), 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 81 [2022-07-21 17:01:17,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:17,025 INFO L225 Difference]: With dead ends: 1088 [2022-07-21 17:01:17,025 INFO L226 Difference]: Without dead ends: 971 [2022-07-21 17:01:17,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1089, Invalid=7653, Unknown=0, NotChecked=0, Total=8742 [2022-07-21 17:01:17,026 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 220 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:17,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 428 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 887 Invalid, 0 Unknown, 414 Unchecked, 0.3s Time] [2022-07-21 17:01:17,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-07-21 17:01:17,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 793. [2022-07-21 17:01:17,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 790 states have (on average 1.1379746835443039) internal successors, (899), 792 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:17,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 899 transitions. [2022-07-21 17:01:17,032 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 899 transitions. Word has length 81 [2022-07-21 17:01:17,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:17,033 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 899 transitions. [2022-07-21 17:01:17,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.275) internal successors, (171), 41 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:17,033 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 899 transitions. [2022-07-21 17:01:17,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 17:01:17,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:17,034 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:17,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:17,251 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,SelfDestructingSolverStorable55 [2022-07-21 17:01:17,252 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:17,252 INFO L85 PathProgramCache]: Analyzing trace with hash 515705984, now seen corresponding path program 10 times [2022-07-21 17:01:17,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:17,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788764828] [2022-07-21 17:01:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:17,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 80 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:01:17,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:17,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788764828] [2022-07-21 17:01:17,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788764828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:17,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095319718] [2022-07-21 17:01:17,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:01:17,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:17,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:17,502 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) [2022-07-21 17:01:17,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 17:01:17,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:01:17,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:17,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 17:01:17,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:17,645 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:01:17,646 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:01:17,842 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 [2022-07-21 17:01:18,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:01:18,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 17:01:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 34 proven. 69 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 17:01:18,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:18,560 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 13 treesize of output 11 [2022-07-21 17:01:18,562 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 20 treesize of output 18 [2022-07-21 17:01:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 29 proven. 74 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 17:01:19,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095319718] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:19,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:19,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 47 [2022-07-21 17:01:19,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017272312] [2022-07-21 17:01:19,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:19,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 17:01:19,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:19,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 17:01:19,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 17:01:19,015 INFO L87 Difference]: Start difference. First operand 793 states and 899 transitions. Second operand has 47 states, 47 states have (on average 3.9361702127659575) internal successors, (185), 47 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:20,320 INFO L93 Difference]: Finished difference Result 786 states and 873 transitions. [2022-07-21 17:01:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-21 17:01:20,321 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.9361702127659575) internal successors, (185), 47 states have internal predecessors, (185), 0 states have call successors, (0), 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 81 [2022-07-21 17:01:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:20,322 INFO L225 Difference]: With dead ends: 786 [2022-07-21 17:01:20,322 INFO L226 Difference]: Without dead ends: 708 [2022-07-21 17:01:20,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=768, Invalid=7242, Unknown=0, NotChecked=0, Total=8010 [2022-07-21 17:01:20,323 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 174 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:20,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 915 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 537 Invalid, 0 Unknown, 429 Unchecked, 0.2s Time] [2022-07-21 17:01:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-07-21 17:01:20,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 572. [2022-07-21 17:01:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 569 states have (on average 1.131810193321617) internal successors, (644), 571 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 644 transitions. [2022-07-21 17:01:20,328 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 644 transitions. Word has length 81 [2022-07-21 17:01:20,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:20,328 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 644 transitions. [2022-07-21 17:01:20,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.9361702127659575) internal successors, (185), 47 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 644 transitions. [2022-07-21 17:01:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 17:01:20,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:20,328 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:20,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:20,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-21 17:01:20,529 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:20,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1514648788, now seen corresponding path program 7 times [2022-07-21 17:01:20,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:20,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709935756] [2022-07-21 17:01:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:20,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:01:21,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:21,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709935756] [2022-07-21 17:01:21,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709935756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:21,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003660491] [2022-07-21 17:01:21,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:01:21,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:21,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:21,320 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) [2022-07-21 17:01:21,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-21 17:01:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:21,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 17:01:21,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:21,583 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 14 treesize of output 10 [2022-07-21 17:01:21,742 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 [2022-07-21 17:01:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:21,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:21,826 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 13 [2022-07-21 17:01:21,827 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 26 treesize of output 22 [2022-07-21 17:01:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:21,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003660491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:21,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:21,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 18] total 41 [2022-07-21 17:01:21,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32929655] [2022-07-21 17:01:21,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:21,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 17:01:21,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 17:01:21,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 17:01:21,954 INFO L87 Difference]: Start difference. First operand 572 states and 644 transitions. Second operand has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:24,284 INFO L93 Difference]: Finished difference Result 1509 states and 1672 transitions. [2022-07-21 17:01:24,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-21 17:01:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 0 states have call successors, (0), 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 81 [2022-07-21 17:01:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:24,288 INFO L225 Difference]: With dead ends: 1509 [2022-07-21 17:01:24,288 INFO L226 Difference]: Without dead ends: 1488 [2022-07-21 17:01:24,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=640, Invalid=5060, Unknown=0, NotChecked=0, Total=5700 [2022-07-21 17:01:24,289 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1123 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 2498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:24,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 1883 Invalid, 2498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2040 Invalid, 0 Unknown, 377 Unchecked, 0.8s Time] [2022-07-21 17:01:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-07-21 17:01:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 840. [2022-07-21 17:01:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 837 states have (on average 1.135005973715651) internal successors, (950), 839 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 950 transitions. [2022-07-21 17:01:24,298 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 950 transitions. Word has length 81 [2022-07-21 17:01:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:24,298 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 950 transitions. [2022-07-21 17:01:24,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 950 transitions. [2022-07-21 17:01:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 17:01:24,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:24,300 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:24,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:24,513 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,SelfDestructingSolverStorable57 [2022-07-21 17:01:24,513 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:24,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1760327563, now seen corresponding path program 11 times [2022-07-21 17:01:24,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:24,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725974043] [2022-07-21 17:01:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:24,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:24,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:24,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725974043] [2022-07-21 17:01:24,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725974043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:24,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854963918] [2022-07-21 17:01:24,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:01:24,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:24,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:24,659 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) [2022-07-21 17:01:24,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-21 17:01:24,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 17:01:24,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 17:01:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:24,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:01:24,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:01:24,828 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 10 treesize of output 8 [2022-07-21 17:01:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:25,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:25,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854963918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:25,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:25,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2022-07-21 17:01:25,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33259935] [2022-07-21 17:01:25,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:25,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 17:01:25,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:25,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 17:01:25,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 17:01:25,549 INFO L87 Difference]: Start difference. First operand 840 states and 950 transitions. Second operand has 34 states, 33 states have (on average 6.121212121212121) internal successors, (202), 34 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:26,227 INFO L93 Difference]: Finished difference Result 938 states and 1039 transitions. [2022-07-21 17:01:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 17:01:26,227 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 6.121212121212121) internal successors, (202), 34 states have internal predecessors, (202), 0 states have call successors, (0), 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 82 [2022-07-21 17:01:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:26,229 INFO L225 Difference]: With dead ends: 938 [2022-07-21 17:01:26,229 INFO L226 Difference]: Without dead ends: 938 [2022-07-21 17:01:26,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=616, Invalid=2354, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 17:01:26,230 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 794 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:26,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 389 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:01:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-07-21 17:01:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 840. [2022-07-21 17:01:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 837 states have (on average 1.1314217443249701) internal successors, (947), 839 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 947 transitions. [2022-07-21 17:01:26,238 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 947 transitions. Word has length 82 [2022-07-21 17:01:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:26,238 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 947 transitions. [2022-07-21 17:01:26,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 6.121212121212121) internal successors, (202), 34 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 947 transitions. [2022-07-21 17:01:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 17:01:26,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:26,240 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:26,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-21 17:01:26,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:26,458 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:26,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:26,458 INFO L85 PathProgramCache]: Analyzing trace with hash 87879678, now seen corresponding path program 12 times [2022-07-21 17:01:26,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:26,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996524531] [2022-07-21 17:01:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:26,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:26,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:26,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996524531] [2022-07-21 17:01:26,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996524531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:26,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297397092] [2022-07-21 17:01:26,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:01:26,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:26,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:26,624 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) [2022-07-21 17:01:26,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-21 17:01:26,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 17:01:26,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:26,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 17:01:26,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:27,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:27,239 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 7 treesize of output 5 [2022-07-21 17:01:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:27,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297397092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:27,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:27,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-07-21 17:01:27,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064961420] [2022-07-21 17:01:27,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:27,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 17:01:27,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:27,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 17:01:27,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 17:01:27,278 INFO L87 Difference]: Start difference. First operand 840 states and 947 transitions. Second operand has 35 states, 34 states have (on average 5.235294117647059) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:28,014 INFO L93 Difference]: Finished difference Result 924 states and 1024 transitions. [2022-07-21 17:01:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 17:01:28,014 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 5.235294117647059) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 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 82 [2022-07-21 17:01:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:28,016 INFO L225 Difference]: With dead ends: 924 [2022-07-21 17:01:28,016 INFO L226 Difference]: Without dead ends: 924 [2022-07-21 17:01:28,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=2561, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 17:01:28,017 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 733 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:28,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 348 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:01:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-07-21 17:01:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 840. [2022-07-21 17:01:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 837 states have (on average 1.1278375149342892) internal successors, (944), 839 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 944 transitions. [2022-07-21 17:01:28,024 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 944 transitions. Word has length 82 [2022-07-21 17:01:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:28,024 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 944 transitions. [2022-07-21 17:01:28,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 5.235294117647059) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 944 transitions. [2022-07-21 17:01:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-21 17:01:28,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:28,026 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:28,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:28,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-21 17:01:28,244 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:28,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:28,245 INFO L85 PathProgramCache]: Analyzing trace with hash -725839209, now seen corresponding path program 8 times [2022-07-21 17:01:28,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:28,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585456068] [2022-07-21 17:01:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:28,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:28,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:28,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585456068] [2022-07-21 17:01:28,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585456068] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:28,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864023942] [2022-07-21 17:01:28,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:01:28,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:28,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:28,470 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:01:28,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-21 17:01:28,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:01:28,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 17:01:28,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:28,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:29,123 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 5 treesize of output 3 [2022-07-21 17:01:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:29,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864023942] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:29,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:29,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 34 [2022-07-21 17:01:29,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720822373] [2022-07-21 17:01:29,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:29,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 17:01:29,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:29,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 17:01:29,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 17:01:29,157 INFO L87 Difference]: Start difference. First operand 840 states and 944 transitions. Second operand has 35 states, 34 states have (on average 4.5) internal successors, (153), 35 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:29,965 INFO L93 Difference]: Finished difference Result 1216 states and 1362 transitions. [2022-07-21 17:01:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:01:29,965 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.5) internal successors, (153), 35 states have internal predecessors, (153), 0 states have call successors, (0), 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 85 [2022-07-21 17:01:29,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:29,968 INFO L225 Difference]: With dead ends: 1216 [2022-07-21 17:01:29,968 INFO L226 Difference]: Without dead ends: 1216 [2022-07-21 17:01:29,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 17:01:29,969 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 517 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:29,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 920 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:01:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-07-21 17:01:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1047. [2022-07-21 17:01:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1044 states have (on average 1.1455938697318007) internal successors, (1196), 1046 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1196 transitions. [2022-07-21 17:01:29,977 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1196 transitions. Word has length 85 [2022-07-21 17:01:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:29,977 INFO L495 AbstractCegarLoop]: Abstraction has 1047 states and 1196 transitions. [2022-07-21 17:01:29,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.5) internal successors, (153), 35 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:29,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1196 transitions. [2022-07-21 17:01:29,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 17:01:29,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:29,992 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:30,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:30,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-07-21 17:01:30,192 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:30,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:30,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1679386246, now seen corresponding path program 9 times [2022-07-21 17:01:30,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:30,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360061830] [2022-07-21 17:01:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:30,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:30,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:30,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360061830] [2022-07-21 17:01:30,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360061830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:30,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315234729] [2022-07-21 17:01:30,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:01:30,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:30,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:30,371 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:01:30,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-21 17:01:30,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 17:01:30,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 17:01:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:30,556 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 10 treesize of output 8 [2022-07-21 17:01:30,756 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 14 treesize of output 10 [2022-07-21 17:01:30,781 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 17 treesize of output 19 [2022-07-21 17:01:30,897 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 [2022-07-21 17:01:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:30,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:30,984 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:01:30,987 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:30,987 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 23 treesize of output 24 [2022-07-21 17:01:30,990 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:30,991 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 37 treesize of output 37 [2022-07-21 17:01:30,992 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 [2022-07-21 17:01:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:31,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315234729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:31,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:31,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 31 [2022-07-21 17:01:31,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059877368] [2022-07-21 17:01:31,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:31,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 17:01:31,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:31,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 17:01:31,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=782, Unknown=1, NotChecked=56, Total=930 [2022-07-21 17:01:31,111 INFO L87 Difference]: Start difference. First operand 1047 states and 1196 transitions. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:31,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:31,483 INFO L93 Difference]: Finished difference Result 1442 states and 1622 transitions. [2022-07-21 17:01:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:01:31,485 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 0 states have call successors, (0), 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 87 [2022-07-21 17:01:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:31,488 INFO L225 Difference]: With dead ends: 1442 [2022-07-21 17:01:31,488 INFO L226 Difference]: Without dead ends: 1300 [2022-07-21 17:01:31,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=1259, Unknown=1, NotChecked=72, Total=1482 [2022-07-21 17:01:31,488 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 102 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:31,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 639 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 559 Invalid, 0 Unknown, 176 Unchecked, 0.2s Time] [2022-07-21 17:01:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-07-21 17:01:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1282. [2022-07-21 17:01:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1279 states have (on average 1.1383893666927287) internal successors, (1456), 1281 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:31,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1456 transitions. [2022-07-21 17:01:31,524 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1456 transitions. Word has length 87 [2022-07-21 17:01:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:31,525 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 1456 transitions. [2022-07-21 17:01:31,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1456 transitions. [2022-07-21 17:01:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 17:01:31,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:31,526 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:31,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:31,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:31,745 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:31,745 INFO L85 PathProgramCache]: Analyzing trace with hash 679180061, now seen corresponding path program 6 times [2022-07-21 17:01:31,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:31,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822088751] [2022-07-21 17:01:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:31,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 19 proven. 143 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:01:32,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:32,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822088751] [2022-07-21 17:01:32,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822088751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:32,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198376994] [2022-07-21 17:01:32,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:01:32,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:32,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:32,048 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:01:32,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-21 17:01:32,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-21 17:01:32,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 17:01:32,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:32,325 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 14 treesize of output 10 [2022-07-21 17:01:32,446 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 [2022-07-21 17:01:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 130 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:32,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:32,515 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 13 [2022-07-21 17:01:32,516 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 26 treesize of output 22 [2022-07-21 17:01:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 130 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:32,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198376994] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:32,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:32,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 40 [2022-07-21 17:01:32,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337066970] [2022-07-21 17:01:32,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:32,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 17:01:32,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:32,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 17:01:32,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1435, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 17:01:32,621 INFO L87 Difference]: Start difference. First operand 1282 states and 1456 transitions. Second operand has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:34,052 INFO L93 Difference]: Finished difference Result 2184 states and 2461 transitions. [2022-07-21 17:01:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 17:01:34,053 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 0 states have call successors, (0), 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 89 [2022-07-21 17:01:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:34,057 INFO L225 Difference]: With dead ends: 2184 [2022-07-21 17:01:34,057 INFO L226 Difference]: Without dead ends: 2155 [2022-07-21 17:01:34,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 160 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=524, Invalid=4168, Unknown=0, NotChecked=0, Total=4692 [2022-07-21 17:01:34,058 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 984 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:34,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 1659 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1586 Invalid, 0 Unknown, 291 Unchecked, 0.5s Time] [2022-07-21 17:01:34,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2022-07-21 17:01:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1643. [2022-07-21 17:01:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1640 states have (on average 1.1384146341463415) internal successors, (1867), 1642 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 1867 transitions. [2022-07-21 17:01:34,073 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 1867 transitions. Word has length 89 [2022-07-21 17:01:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:34,073 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 1867 transitions. [2022-07-21 17:01:34,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 1867 transitions. [2022-07-21 17:01:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 17:01:34,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:34,074 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:34,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-21 17:01:34,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-07-21 17:01:34,293 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:34,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2046876227, now seen corresponding path program 10 times [2022-07-21 17:01:34,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:34,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333887117] [2022-07-21 17:01:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:34,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:34,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333887117] [2022-07-21 17:01:34,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333887117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:34,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101751713] [2022-07-21 17:01:34,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:01:34,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:34,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:34,447 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:01:34,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-21 17:01:34,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:01:34,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 17:01:34,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:34,580 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:01:34,580 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:01:34,872 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 16 treesize of output 12 [2022-07-21 17:01:34,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:01:34,898 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 19 treesize of output 21 [2022-07-21 17:01:35,327 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:35,327 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 19 treesize of output 19 [2022-07-21 17:01:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 32 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:01:35,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:36,015 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1769 (Array Int Int)) (|v_ULTIMATE.start_substring_~ps~0#1.offset_136| Int)) (let ((.cse0 (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (<= (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_136| 6) .cse0) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1769) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_136| 4)) 0) (< .cse0 (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_136| 3)) (not (<= 0 |v_ULTIMATE.start_substring_~ps~0#1.offset_136|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps~0#1.offset_136|)))) is different from false [2022-07-21 17:01:36,022 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:36,023 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 23 treesize of output 24 [2022-07-21 17:01:36,028 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:36,028 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 37 treesize of output 37 [2022-07-21 17:01:36,032 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 [2022-07-21 17:01:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:01:37,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101751713] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:37,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:37,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 23] total 57 [2022-07-21 17:01:37,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127981409] [2022-07-21 17:01:37,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:37,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 17:01:37,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:37,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 17:01:37,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=2861, Unknown=1, NotChecked=110, Total=3306 [2022-07-21 17:01:37,431 INFO L87 Difference]: Start difference. First operand 1643 states and 1867 transitions. Second operand has 58 states, 57 states have (on average 4.649122807017544) internal successors, (265), 58 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:40,836 INFO L93 Difference]: Finished difference Result 1959 states and 2230 transitions. [2022-07-21 17:01:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 17:01:40,837 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.649122807017544) internal successors, (265), 58 states have internal predecessors, (265), 0 states have call successors, (0), 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 91 [2022-07-21 17:01:40,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:40,841 INFO L225 Difference]: With dead ends: 1959 [2022-07-21 17:01:40,842 INFO L226 Difference]: Without dead ends: 1959 [2022-07-21 17:01:40,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 141 SyntacticMatches, 28 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1764 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1610, Invalid=6765, Unknown=1, NotChecked=180, Total=8556 [2022-07-21 17:01:40,843 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1401 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 731 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:40,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 976 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1396 Invalid, 0 Unknown, 731 Unchecked, 0.7s Time] [2022-07-21 17:01:40,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2022-07-21 17:01:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1769. [2022-07-21 17:01:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1766 states have (on average 1.1432616081540203) internal successors, (2019), 1768 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2019 transitions. [2022-07-21 17:01:40,860 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2019 transitions. Word has length 91 [2022-07-21 17:01:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:40,861 INFO L495 AbstractCegarLoop]: Abstraction has 1769 states and 2019 transitions. [2022-07-21 17:01:40,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.649122807017544) internal successors, (265), 58 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2019 transitions. [2022-07-21 17:01:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 17:01:40,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:40,863 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:40,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:41,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:41,082 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:41,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1003903189, now seen corresponding path program 13 times [2022-07-21 17:01:41,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:41,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283850353] [2022-07-21 17:01:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:41,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 25 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:01:41,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:41,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283850353] [2022-07-21 17:01:41,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283850353] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:41,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617386296] [2022-07-21 17:01:41,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:01:41,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:41,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:41,812 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:01:41,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-21 17:01:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:41,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-21 17:01:41,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:41,968 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 10 treesize of output 8 [2022-07-21 17:01:42,252 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 14 treesize of output 10 [2022-07-21 17:01:42,299 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 17 treesize of output 19 [2022-07-21 17:01:42,640 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:01:42,640 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 30 treesize of output 23 [2022-07-21 17:01:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 25 proven. 116 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:42,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:42,872 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1820 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1820) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-07-21 17:01:42,875 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:42,876 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 23 treesize of output 24 [2022-07-21 17:01:42,880 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:42,880 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 37 treesize of output 37 [2022-07-21 17:01:42,883 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 [2022-07-21 17:01:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 25 proven. 116 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:43,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617386296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:43,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:43,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 49 [2022-07-21 17:01:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404839943] [2022-07-21 17:01:43,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:43,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:01:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:01:43,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2115, Unknown=1, NotChecked=92, Total=2352 [2022-07-21 17:01:43,193 INFO L87 Difference]: Start difference. First operand 1769 states and 2019 transitions. Second operand has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:44,930 INFO L93 Difference]: Finished difference Result 1734 states and 1967 transitions. [2022-07-21 17:01:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 17:01:44,931 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 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 93 [2022-07-21 17:01:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:44,934 INFO L225 Difference]: With dead ends: 1734 [2022-07-21 17:01:44,934 INFO L226 Difference]: Without dead ends: 1582 [2022-07-21 17:01:44,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 159 SyntacticMatches, 8 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=412, Invalid=5290, Unknown=2, NotChecked=148, Total=5852 [2022-07-21 17:01:44,935 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 200 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:44,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1543 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2274 Invalid, 0 Unknown, 298 Unchecked, 0.8s Time] [2022-07-21 17:01:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-07-21 17:01:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1566. [2022-07-21 17:01:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1563 states have (on average 1.1433141394753679) internal successors, (1787), 1565 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 1787 transitions. [2022-07-21 17:01:44,946 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 1787 transitions. Word has length 93 [2022-07-21 17:01:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:44,946 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 1787 transitions. [2022-07-21 17:01:44,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 1787 transitions. [2022-07-21 17:01:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 17:01:44,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:44,948 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:44,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-21 17:01:45,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:45,168 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:45,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1836805286, now seen corresponding path program 14 times [2022-07-21 17:01:45,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:45,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069711861] [2022-07-21 17:01:45,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:45,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 25 proven. 106 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:45,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:45,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069711861] [2022-07-21 17:01:45,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069711861] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:45,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219167484] [2022-07-21 17:01:45,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:01:45,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:45,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:45,495 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:01:45,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-21 17:01:45,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:01:45,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:45,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-21 17:01:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:45,842 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 14 treesize of output 10 [2022-07-21 17:01:45,881 INFO L356 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2022-07-21 17:01:45,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 25 treesize of output 24 [2022-07-21 17:01:46,131 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:01:46,131 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 30 treesize of output 23 [2022-07-21 17:01:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 25 proven. 106 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:46,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:47,577 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:01:47,580 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 56 treesize of output 50 [2022-07-21 17:01:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 25 proven. 106 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:01:47,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219167484] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:47,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:47,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 41 [2022-07-21 17:01:47,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194907693] [2022-07-21 17:01:47,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:47,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 17:01:47,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:47,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 17:01:47,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1441, Unknown=1, NotChecked=76, Total=1640 [2022-07-21 17:01:47,748 INFO L87 Difference]: Start difference. First operand 1566 states and 1787 transitions. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:48,383 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~length1~0#1| 5) (<= 5 |c_ULTIMATE.start_main_~length1~0#1|)) is different from false [2022-07-21 17:01:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:48,746 INFO L93 Difference]: Finished difference Result 1541 states and 1750 transitions. [2022-07-21 17:01:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 17:01:48,747 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 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 93 [2022-07-21 17:01:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:48,751 INFO L225 Difference]: With dead ends: 1541 [2022-07-21 17:01:48,751 INFO L226 Difference]: Without dead ends: 1399 [2022-07-21 17:01:48,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=234, Invalid=2528, Unknown=2, NotChecked=206, Total=2970 [2022-07-21 17:01:48,752 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 94 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:48,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 927 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1150 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-07-21 17:01:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-07-21 17:01:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1392. [2022-07-21 17:01:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1389 states have (on average 1.144708423326134) internal successors, (1590), 1391 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 1590 transitions. [2022-07-21 17:01:48,761 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 1590 transitions. Word has length 93 [2022-07-21 17:01:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:48,761 INFO L495 AbstractCegarLoop]: Abstraction has 1392 states and 1590 transitions. [2022-07-21 17:01:48,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 1590 transitions. [2022-07-21 17:01:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 17:01:48,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:48,762 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:48,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:48,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-21 17:01:48,981 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:48,981 INFO L85 PathProgramCache]: Analyzing trace with hash -993374287, now seen corresponding path program 15 times [2022-07-21 17:01:48,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:48,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270981680] [2022-07-21 17:01:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:48,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 25 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:01:49,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:49,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270981680] [2022-07-21 17:01:49,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270981680] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:49,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910909995] [2022-07-21 17:01:49,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:01:49,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:49,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:49,431 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:01:49,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-21 17:01:49,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 17:01:49,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:49,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 17:01:49,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:49,660 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 10 treesize of output 8 [2022-07-21 17:01:49,847 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 14 treesize of output 10 [2022-07-21 17:01:49,885 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 17 treesize of output 19 [2022-07-21 17:01:50,497 INFO L356 Elim1Store]: treesize reduction 3, result has 91.9 percent of original size [2022-07-21 17:01:50,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 47 [2022-07-21 17:01:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 15 proven. 110 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:01:50,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:51,826 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1933 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.base| Int) (|v_ULTIMATE.start_substring_~ps2~0#1.offset_246| Int) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1933))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_substring_~ps2~0#1.offset_246|))) (not (<= 0 |v_ULTIMATE.start_substring_~ps2~0#1.offset_246|)) (<= (+ 2 |v_ULTIMATE.start_substring_~ps2~0#1.offset_246|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) |v_ULTIMATE.start_substring_~ps2~0#1.offset_246|) (= .cse0 0))))) is different from false [2022-07-21 17:01:51,835 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:51,835 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 62 treesize of output 40 [2022-07-21 17:01:51,852 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:51,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2022-07-21 17:01:51,862 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:51,862 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 64 treesize of output 62 [2022-07-21 17:01:51,867 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 [2022-07-21 17:01:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 28 proven. 97 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:01:52,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910909995] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:52,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:52,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 21] total 67 [2022-07-21 17:01:52,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987676017] [2022-07-21 17:01:52,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:52,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-21 17:01:52,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:52,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-21 17:01:52,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=3978, Unknown=1, NotChecked=128, Total=4422 [2022-07-21 17:01:52,433 INFO L87 Difference]: Start difference. First operand 1392 states and 1590 transitions. Second operand has 67 states, 67 states have (on average 3.5671641791044775) internal successors, (239), 67 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) [2022-07-21 17:01:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:55,569 INFO L93 Difference]: Finished difference Result 1524 states and 1726 transitions. [2022-07-21 17:01:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-21 17:01:55,570 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.5671641791044775) internal successors, (239), 67 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 93 [2022-07-21 17:01:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:55,572 INFO L225 Difference]: With dead ends: 1524 [2022-07-21 17:01:55,572 INFO L226 Difference]: Without dead ends: 1460 [2022-07-21 17:01:55,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1854, Invalid=19611, Unknown=1, NotChecked=290, Total=21756 [2022-07-21 17:01:55,573 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 111 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:55,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 653 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 936 Invalid, 0 Unknown, 275 Unchecked, 0.2s Time] [2022-07-21 17:01:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-07-21 17:01:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1392. [2022-07-21 17:01:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1389 states have (on average 1.1454283657307416) internal successors, (1591), 1391 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 1591 transitions. [2022-07-21 17:01:55,603 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 1591 transitions. Word has length 93 [2022-07-21 17:01:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:55,604 INFO L495 AbstractCegarLoop]: Abstraction has 1392 states and 1591 transitions. [2022-07-21 17:01:55,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.5671641791044775) internal successors, (239), 67 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) [2022-07-21 17:01:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 1591 transitions. [2022-07-21 17:01:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 17:01:55,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:55,619 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:55,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:55,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-21 17:01:55,823 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash -219946528, now seen corresponding path program 7 times [2022-07-21 17:01:55,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:55,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295904220] [2022-07-21 17:01:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:55,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 25 proven. 163 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:01:56,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:56,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295904220] [2022-07-21 17:01:56,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295904220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:56,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178863388] [2022-07-21 17:01:56,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:01:56,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:56,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:56,306 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:01:56,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-21 17:01:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:56,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-21 17:01:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:56,502 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 10 treesize of output 8 [2022-07-21 17:01:56,711 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 14 treesize of output 10 [2022-07-21 17:01:56,741 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 17 treesize of output 19 [2022-07-21 17:01:57,006 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:01:57,006 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 30 treesize of output 23 [2022-07-21 17:01:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:01:57,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:57,197 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1996 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1996) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:01:57,203 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:57,203 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 23 treesize of output 24 [2022-07-21 17:01:57,207 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:01:57,208 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 37 treesize of output 37 [2022-07-21 17:01:57,210 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 [2022-07-21 17:01:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:01:57,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178863388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:57,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:01:57,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 49 [2022-07-21 17:01:57,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961947500] [2022-07-21 17:01:57,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:57,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:01:57,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:01:57,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:01:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2094, Unknown=1, NotChecked=92, Total=2352 [2022-07-21 17:01:57,456 INFO L87 Difference]: Start difference. First operand 1392 states and 1591 transitions. Second operand has 49 states, 49 states have (on average 3.122448979591837) internal successors, (153), 49 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:58,440 INFO L93 Difference]: Finished difference Result 1401 states and 1594 transitions. [2022-07-21 17:01:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 17:01:58,441 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.122448979591837) internal successors, (153), 49 states have internal predecessors, (153), 0 states have call successors, (0), 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 93 [2022-07-21 17:01:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:58,442 INFO L225 Difference]: With dead ends: 1401 [2022-07-21 17:01:58,442 INFO L226 Difference]: Without dead ends: 1401 [2022-07-21 17:01:58,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=459, Invalid=4946, Unknown=1, NotChecked=144, Total=5550 [2022-07-21 17:01:58,443 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 215 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:58,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1188 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1847 Invalid, 0 Unknown, 283 Unchecked, 0.5s Time] [2022-07-21 17:01:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-07-21 17:01:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1340. [2022-07-21 17:01:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1337 states have (on average 1.1451009723261032) internal successors, (1531), 1339 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1531 transitions. [2022-07-21 17:01:58,452 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1531 transitions. Word has length 93 [2022-07-21 17:01:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:58,452 INFO L495 AbstractCegarLoop]: Abstraction has 1340 states and 1531 transitions. [2022-07-21 17:01:58,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.122448979591837) internal successors, (153), 49 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:58,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1531 transitions. [2022-07-21 17:01:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 17:01:58,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:58,453 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:58,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:58,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-21 17:01:58,666 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:01:58,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2095756590, now seen corresponding path program 16 times [2022-07-21 17:01:58,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:01:58,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142281287] [2022-07-21 17:01:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:01:58,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:01:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:01:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 15 proven. 143 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:58,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:01:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142281287] [2022-07-21 17:01:58,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142281287] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:01:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656077503] [2022-07-21 17:01:58,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:01:58,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:01:58,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:01:58,884 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:01:58,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-21 17:01:59,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:01:59,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-21 17:01:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:59,056 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 10 treesize of output 8 [2022-07-21 17:01:59,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:01:59,561 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 16 treesize of output 12 [2022-07-21 17:01:59,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:01:59,592 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 19 treesize of output 21 [2022-07-21 17:02:00,348 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-21 17:02:00,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2022-07-21 17:02:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 32 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:02:00,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:01,440 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (|ULTIMATE.start_substring_~pt~0#1.offset| Int) (|v_ULTIMATE.start_substring_~ps~0#1.offset_159| Int) (v_ArrVal_2052 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2052))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_159| 4)))) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps~0#1.offset_159|) (<= (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_159| 6) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (<= 0 |v_ULTIMATE.start_substring_~ps~0#1.offset_159|)) (= .cse0 0))))) is different from false [2022-07-21 17:02:01,447 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:01,447 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 64 treesize of output 42 [2022-07-21 17:02:01,459 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:01,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2022-07-21 17:02:01,467 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:01,467 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 68 treesize of output 64 [2022-07-21 17:02:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:02:02,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656077503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:02,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:02,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 28, 28] total 69 [2022-07-21 17:02:02,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294432799] [2022-07-21 17:02:02,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:02,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-21 17:02:02,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:02,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-21 17:02:02,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=4303, Unknown=1, NotChecked=134, Total=4830 [2022-07-21 17:02:02,880 INFO L87 Difference]: Start difference. First operand 1340 states and 1531 transitions. Second operand has 70 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 70 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:07,286 INFO L93 Difference]: Finished difference Result 1678 states and 1888 transitions. [2022-07-21 17:02:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-21 17:02:07,287 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 70 states have internal predecessors, (275), 0 states have call successors, (0), 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 97 [2022-07-21 17:02:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:07,289 INFO L225 Difference]: With dead ends: 1678 [2022-07-21 17:02:07,289 INFO L226 Difference]: Without dead ends: 1678 [2022-07-21 17:02:07,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 153 SyntacticMatches, 16 SemanticMatches, 129 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4274 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1846, Invalid=14911, Unknown=17, NotChecked=256, Total=17030 [2022-07-21 17:02:07,290 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 382 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:07,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 966 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 662 Invalid, 0 Unknown, 1156 Unchecked, 0.3s Time] [2022-07-21 17:02:07,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2022-07-21 17:02:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1476. [2022-07-21 17:02:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1473 states have (on average 1.1391717583163612) internal successors, (1678), 1475 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 1678 transitions. [2022-07-21 17:02:07,309 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 1678 transitions. Word has length 97 [2022-07-21 17:02:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:07,309 INFO L495 AbstractCegarLoop]: Abstraction has 1476 states and 1678 transitions. [2022-07-21 17:02:07,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 70 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 1678 transitions. [2022-07-21 17:02:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 17:02:07,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:07,311 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:07,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-21 17:02:07,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:07,529 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:02:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:07,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1262854493, now seen corresponding path program 17 times [2022-07-21 17:02:07,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:07,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730038338] [2022-07-21 17:02:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:07,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 15 proven. 133 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:02:07,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:07,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730038338] [2022-07-21 17:02:07,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730038338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:07,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473444443] [2022-07-21 17:02:07,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:02:07,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:07,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:07,718 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:02:07,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-21 17:02:07,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 17:02:07,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:07,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 17:02:07,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:07,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:02:07,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:02:07,913 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 10 treesize of output 8 [2022-07-21 17:02:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 28 proven. 120 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:02:08,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 45 proven. 103 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:02:08,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473444443] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:08,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:08,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2022-07-21 17:02:08,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217323076] [2022-07-21 17:02:08,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:08,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 17:02:08,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:08,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 17:02:08,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 17:02:08,796 INFO L87 Difference]: Start difference. First operand 1476 states and 1678 transitions. Second operand has 40 states, 39 states have (on average 6.0256410256410255) internal successors, (235), 40 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:10,045 INFO L93 Difference]: Finished difference Result 1588 states and 1779 transitions. [2022-07-21 17:02:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 17:02:10,045 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 6.0256410256410255) internal successors, (235), 40 states have internal predecessors, (235), 0 states have call successors, (0), 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 97 [2022-07-21 17:02:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:10,047 INFO L225 Difference]: With dead ends: 1588 [2022-07-21 17:02:10,047 INFO L226 Difference]: Without dead ends: 1588 [2022-07-21 17:02:10,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=918, Invalid=3504, Unknown=0, NotChecked=0, Total=4422 [2022-07-21 17:02:10,047 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 905 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:10,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 606 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:02:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-07-21 17:02:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1476. [2022-07-21 17:02:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1473 states have (on average 1.1371350984385609) internal successors, (1675), 1475 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 1675 transitions. [2022-07-21 17:02:10,058 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 1675 transitions. Word has length 97 [2022-07-21 17:02:10,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:10,058 INFO L495 AbstractCegarLoop]: Abstraction has 1476 states and 1675 transitions. [2022-07-21 17:02:10,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 6.0256410256410255) internal successors, (235), 40 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 1675 transitions. [2022-07-21 17:02:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-21 17:02:10,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:10,060 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:10,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:10,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-21 17:02:10,278 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:02:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1415254045, now seen corresponding path program 8 times [2022-07-21 17:02:10,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:10,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039382806] [2022-07-21 17:02:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:10,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 15 proven. 125 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:02:10,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039382806] [2022-07-21 17:02:10,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039382806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:10,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767845554] [2022-07-21 17:02:10,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:02:10,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:10,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:10,476 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:02:10,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-21 17:02:10,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:02:10,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:10,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 17:02:10,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:02:10,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:11,168 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 5 treesize of output 3 [2022-07-21 17:02:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:02:11,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767845554] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:11,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:11,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 34 [2022-07-21 17:02:11,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242119916] [2022-07-21 17:02:11,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:11,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 17:02:11,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 17:02:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 17:02:11,220 INFO L87 Difference]: Start difference. First operand 1476 states and 1675 transitions. Second operand has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:11,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:11,756 INFO L93 Difference]: Finished difference Result 1522 states and 1718 transitions. [2022-07-21 17:02:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:02:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-07-21 17:02:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:11,758 INFO L225 Difference]: With dead ends: 1522 [2022-07-21 17:02:11,759 INFO L226 Difference]: Without dead ends: 1522 [2022-07-21 17:02:11,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 17:02:11,759 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 596 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:11,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 525 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:02:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-07-21 17:02:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1480. [2022-07-21 17:02:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1477 states have (on average 1.1367637102234258) internal successors, (1679), 1479 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 1679 transitions. [2022-07-21 17:02:11,769 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 1679 transitions. Word has length 97 [2022-07-21 17:02:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:11,769 INFO L495 AbstractCegarLoop]: Abstraction has 1480 states and 1679 transitions. [2022-07-21 17:02:11,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 1679 transitions. [2022-07-21 17:02:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-21 17:02:11,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:11,771 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:11,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-21 17:02:11,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:11,979 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:02:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash -437416829, now seen corresponding path program 18 times [2022-07-21 17:02:11,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:11,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35753711] [2022-07-21 17:02:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:11,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 173 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:02:12,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:12,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35753711] [2022-07-21 17:02:12,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35753711] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:12,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204904980] [2022-07-21 17:02:12,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:02:12,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:12,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:12,537 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:02:12,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-21 17:02:12,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-21 17:02:12,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:12,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-21 17:02:12,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:12,745 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 10 treesize of output 8 [2022-07-21 17:02:12,994 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 14 treesize of output 10 [2022-07-21 17:02:13,030 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 17 treesize of output 19 [2022-07-21 17:02:13,315 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:02:13,316 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 30 treesize of output 23 [2022-07-21 17:02:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 128 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 17:02:13,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:13,499 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2229 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2229) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:02:13,502 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:13,503 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 23 treesize of output 24 [2022-07-21 17:02:13,507 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:13,507 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 37 treesize of output 37 [2022-07-21 17:02:13,510 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 [2022-07-21 17:02:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 128 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 17:02:13,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204904980] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:13,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:13,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 47 [2022-07-21 17:02:13,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008851177] [2022-07-21 17:02:13,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:13,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 17:02:13,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:13,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 17:02:13,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1916, Unknown=1, NotChecked=88, Total=2162 [2022-07-21 17:02:13,771 INFO L87 Difference]: Start difference. First operand 1480 states and 1679 transitions. Second operand has 47 states, 47 states have (on average 3.404255319148936) internal successors, (160), 47 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:15,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:15,018 INFO L93 Difference]: Finished difference Result 1471 states and 1666 transitions. [2022-07-21 17:02:15,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 17:02:15,019 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.404255319148936) internal successors, (160), 47 states have internal predecessors, (160), 0 states have call successors, (0), 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 100 [2022-07-21 17:02:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:15,021 INFO L225 Difference]: With dead ends: 1471 [2022-07-21 17:02:15,021 INFO L226 Difference]: Without dead ends: 1374 [2022-07-21 17:02:15,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 175 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=377, Invalid=4182, Unknown=1, NotChecked=132, Total=4692 [2022-07-21 17:02:15,021 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 156 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:15,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1112 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1751 Invalid, 0 Unknown, 267 Unchecked, 0.6s Time] [2022-07-21 17:02:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-07-21 17:02:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1371. [2022-07-21 17:02:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1368 states have (on average 1.141812865497076) internal successors, (1562), 1370 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1562 transitions. [2022-07-21 17:02:15,031 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1562 transitions. Word has length 100 [2022-07-21 17:02:15,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:15,031 INFO L495 AbstractCegarLoop]: Abstraction has 1371 states and 1562 transitions. [2022-07-21 17:02:15,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.404255319148936) internal successors, (160), 47 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1562 transitions. [2022-07-21 17:02:15,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-21 17:02:15,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:15,032 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:15,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:15,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:15,251 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:02:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:15,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1647941571, now seen corresponding path program 19 times [2022-07-21 17:02:15,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:15,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168653499] [2022-07-21 17:02:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:15,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 17:02:15,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:15,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168653499] [2022-07-21 17:02:15,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168653499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:15,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131762883] [2022-07-21 17:02:15,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:02:15,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:15,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:15,431 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:02:15,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-21 17:02:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:15,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 17:02:15,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:15,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:02:15,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:02:15,631 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 10 treesize of output 8 [2022-07-21 17:02:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 147 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 17:02:16,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 130 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 17:02:16,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131762883] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:16,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:16,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-07-21 17:02:16,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152495422] [2022-07-21 17:02:16,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:16,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 17:02:16,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 17:02:16,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 17:02:16,597 INFO L87 Difference]: Start difference. First operand 1371 states and 1562 transitions. Second operand has 43 states, 42 states have (on average 5.428571428571429) internal successors, (228), 43 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:17,875 INFO L93 Difference]: Finished difference Result 1461 states and 1648 transitions. [2022-07-21 17:02:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 17:02:17,875 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 5.428571428571429) internal successors, (228), 43 states have internal predecessors, (228), 0 states have call successors, (0), 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 100 [2022-07-21 17:02:17,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:17,877 INFO L225 Difference]: With dead ends: 1461 [2022-07-21 17:02:17,877 INFO L226 Difference]: Without dead ends: 1461 [2022-07-21 17:02:17,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1061, Invalid=4051, Unknown=0, NotChecked=0, Total=5112 [2022-07-21 17:02:17,878 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 914 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:17,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 544 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:02:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2022-07-21 17:02:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1349. [2022-07-21 17:02:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1346 states have (on average 1.1411589895988112) internal successors, (1536), 1348 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1536 transitions. [2022-07-21 17:02:17,886 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1536 transitions. Word has length 100 [2022-07-21 17:02:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:17,887 INFO L495 AbstractCegarLoop]: Abstraction has 1349 states and 1536 transitions. [2022-07-21 17:02:17,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 5.428571428571429) internal successors, (228), 43 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1536 transitions. [2022-07-21 17:02:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-21 17:02:17,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:17,888 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:17,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:18,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-07-21 17:02:18,106 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:02:18,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:18,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1860717283, now seen corresponding path program 9 times [2022-07-21 17:02:18,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:18,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447910630] [2022-07-21 17:02:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:18,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 28 proven. 149 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:02:18,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:18,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447910630] [2022-07-21 17:02:18,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447910630] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:18,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075875129] [2022-07-21 17:02:18,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:02:18,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:18,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:18,300 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:02:18,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-21 17:02:18,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-21 17:02:18,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:18,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 17:02:18,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:18,551 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:02:18,551 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:02:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:02:18,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 66 proven. 111 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:02:19,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075875129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:19,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:19,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2022-07-21 17:02:19,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872071652] [2022-07-21 17:02:19,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:19,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 17:02:19,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:19,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 17:02:19,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=2380, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 17:02:19,375 INFO L87 Difference]: Start difference. First operand 1349 states and 1536 transitions. Second operand has 53 states, 52 states have (on average 4.6923076923076925) internal successors, (244), 53 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) [2022-07-21 17:02:20,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:20,404 INFO L93 Difference]: Finished difference Result 1842 states and 2087 transitions. [2022-07-21 17:02:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 17:02:20,404 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.6923076923076925) internal successors, (244), 53 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 100 [2022-07-21 17:02:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:20,406 INFO L225 Difference]: With dead ends: 1842 [2022-07-21 17:02:20,406 INFO L226 Difference]: Without dead ends: 1842 [2022-07-21 17:02:20,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1039, Invalid=4073, Unknown=0, NotChecked=0, Total=5112 [2022-07-21 17:02:20,407 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 722 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:20,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1131 Invalid, 2448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:02:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2022-07-21 17:02:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1625. [2022-07-21 17:02:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1622 states have (on average 1.1559802712700369) internal successors, (1875), 1624 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 1875 transitions. [2022-07-21 17:02:20,419 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 1875 transitions. Word has length 100 [2022-07-21 17:02:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:20,419 INFO L495 AbstractCegarLoop]: Abstraction has 1625 states and 1875 transitions. [2022-07-21 17:02:20,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.6923076923076925) internal successors, (244), 53 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) [2022-07-21 17:02:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 1875 transitions. [2022-07-21 17:02:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-21 17:02:20,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:20,421 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:20,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-21 17:02:20,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:20,639 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:02:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:20,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1943791869, now seen corresponding path program 3 times [2022-07-21 17:02:20,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:20,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212296684] [2022-07-21 17:02:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:20,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 7 proven. 215 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:02:21,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:21,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212296684] [2022-07-21 17:02:21,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212296684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:21,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356978024] [2022-07-21 17:02:21,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:02:21,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:21,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:21,166 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:02:21,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-21 17:02:21,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 17:02:21,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:21,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-21 17:02:21,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:21,417 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 10 treesize of output 8 [2022-07-21 17:02:21,701 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 14 treesize of output 10 [2022-07-21 17:02:21,747 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 17 treesize of output 19 [2022-07-21 17:02:22,086 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:02:22,086 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 30 treesize of output 23 [2022-07-21 17:02:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 7 proven. 194 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:02:22,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:22,257 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2409 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2409) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-07-21 17:02:22,260 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:22,260 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 23 treesize of output 24 [2022-07-21 17:02:22,264 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:22,264 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 37 treesize of output 37 [2022-07-21 17:02:22,266 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 [2022-07-21 17:02:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 7 proven. 187 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 17:02:22,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356978024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:22,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:22,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 25] total 53 [2022-07-21 17:02:22,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025475650] [2022-07-21 17:02:22,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:22,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 17:02:22,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:22,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 17:02:22,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2508, Unknown=1, NotChecked=100, Total=2756 [2022-07-21 17:02:22,495 INFO L87 Difference]: Start difference. First operand 1625 states and 1875 transitions. Second operand has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:24,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:24,403 INFO L93 Difference]: Finished difference Result 3267 states and 3752 transitions. [2022-07-21 17:02:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 17:02:24,404 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 0 states have call successors, (0), 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 103 [2022-07-21 17:02:24,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:24,407 INFO L225 Difference]: With dead ends: 3267 [2022-07-21 17:02:24,407 INFO L226 Difference]: Without dead ends: 3267 [2022-07-21 17:02:24,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 180 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=724, Invalid=6935, Unknown=1, NotChecked=172, Total=7832 [2022-07-21 17:02:24,408 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 518 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 2292 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:24,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1327 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2292 Invalid, 0 Unknown, 321 Unchecked, 0.7s Time] [2022-07-21 17:02:24,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2022-07-21 17:02:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 1862. [2022-07-21 17:02:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1859 states have (on average 1.1527703066164605) internal successors, (2143), 1861 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2143 transitions. [2022-07-21 17:02:24,425 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2143 transitions. Word has length 103 [2022-07-21 17:02:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:24,425 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2143 transitions. [2022-07-21 17:02:24,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2143 transitions. [2022-07-21 17:02:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-21 17:02:24,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:24,427 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:24,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:24,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-07-21 17:02:24,644 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:02:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:24,644 INFO L85 PathProgramCache]: Analyzing trace with hash -817121690, now seen corresponding path program 20 times [2022-07-21 17:02:24,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:24,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576315390] [2022-07-21 17:02:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:24,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 15 proven. 176 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:02:24,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:24,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576315390] [2022-07-21 17:02:24,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576315390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:24,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873758867] [2022-07-21 17:02:24,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:02:24,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:24,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:24,818 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:02:24,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-21 17:02:24,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:02:24,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:24,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-21 17:02:24,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:25,002 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:02:25,003 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:02:25,492 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 [2022-07-21 17:02:26,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:02:26,711 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:26,712 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 15 [2022-07-21 17:02:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 28 proven. 178 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:02:26,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:27,383 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 37 treesize of output 31 [2022-07-21 17:02:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 45 proven. 161 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:02:28,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873758867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:28,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:28,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 23] total 58 [2022-07-21 17:02:28,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060630261] [2022-07-21 17:02:28,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:28,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-21 17:02:28,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:28,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-21 17:02:28,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=3137, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 17:02:28,136 INFO L87 Difference]: Start difference. First operand 1862 states and 2143 transitions. Second operand has 59 states, 58 states have (on average 4.793103448275862) internal successors, (278), 59 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:32,297 INFO L93 Difference]: Finished difference Result 2131 states and 2403 transitions. [2022-07-21 17:02:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-21 17:02:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.793103448275862) internal successors, (278), 59 states have internal predecessors, (278), 0 states have call successors, (0), 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 104 [2022-07-21 17:02:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:32,312 INFO L225 Difference]: With dead ends: 2131 [2022-07-21 17:02:32,327 INFO L226 Difference]: Without dead ends: 2131 [2022-07-21 17:02:32,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3113, Invalid=18939, Unknown=0, NotChecked=0, Total=22052 [2022-07-21 17:02:32,329 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 4166 mSDsluCounter, 2119 mSDsCounter, 0 mSdLazyCounter, 3310 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4166 SdHoareTripleChecker+Valid, 2207 SdHoareTripleChecker+Invalid, 5159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 3310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 948 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:32,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4166 Valid, 2207 Invalid, 5159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 3310 Invalid, 0 Unknown, 948 Unchecked, 1.1s Time] [2022-07-21 17:02:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2022-07-21 17:02:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1790. [2022-07-21 17:02:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1787 states have (on average 1.153329602686066) internal successors, (2061), 1789 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2061 transitions. [2022-07-21 17:02:32,341 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2061 transitions. Word has length 104 [2022-07-21 17:02:32,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:32,341 INFO L495 AbstractCegarLoop]: Abstraction has 1790 states and 2061 transitions. [2022-07-21 17:02:32,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.793103448275862) internal successors, (278), 59 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:32,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2061 transitions. [2022-07-21 17:02:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-21 17:02:32,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:32,350 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:32,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-21 17:02:32,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:32,584 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:02:32,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash 779219134, now seen corresponding path program 21 times [2022-07-21 17:02:32,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:32,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693371785] [2022-07-21 17:02:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:32,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 15 proven. 176 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:02:32,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:32,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693371785] [2022-07-21 17:02:32,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693371785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:32,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929606564] [2022-07-21 17:02:32,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:02:32,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:32,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:32,752 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:02:32,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-21 17:02:33,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 17:02:33,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 103 conjunts are in the unsatisfiable core [2022-07-21 17:02:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:33,023 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:02:33,023 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:02:33,030 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 10 treesize of output 8 [2022-07-21 17:02:33,427 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 16 treesize of output 12 [2022-07-21 17:02:33,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 17:02:34,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:02:34,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:02:34,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:02:34,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:02:34,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:02:34,223 INFO L356 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2022-07-21 17:02:34,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 51 treesize of output 37 [2022-07-21 17:02:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 17 proven. 161 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 17:02:34,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:37,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:02:37,089 INFO L356 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2022-07-21 17:02:37,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 497 treesize of output 450 [2022-07-21 17:02:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 17:02:38,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929606564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:38,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:38,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26, 27] total 66 [2022-07-21 17:02:38,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46683848] [2022-07-21 17:02:38,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:38,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-21 17:02:38,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:38,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-21 17:02:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=4064, Unknown=1, NotChecked=0, Total=4422 [2022-07-21 17:02:38,135 INFO L87 Difference]: Start difference. First operand 1790 states and 2061 transitions. Second operand has 67 states, 66 states have (on average 3.8636363636363638) internal successors, (255), 67 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:43,153 INFO L93 Difference]: Finished difference Result 2412 states and 2742 transitions. [2022-07-21 17:02:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-07-21 17:02:43,153 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.8636363636363638) internal successors, (255), 67 states have internal predecessors, (255), 0 states have call successors, (0), 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 104 [2022-07-21 17:02:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:43,171 INFO L225 Difference]: With dead ends: 2412 [2022-07-21 17:02:43,171 INFO L226 Difference]: Without dead ends: 2412 [2022-07-21 17:02:43,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7173 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2407, Invalid=23674, Unknown=1, NotChecked=0, Total=26082 [2022-07-21 17:02:43,173 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 503 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 862 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:43,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1305 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1138 Invalid, 0 Unknown, 862 Unchecked, 0.4s Time] [2022-07-21 17:02:43,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2022-07-21 17:02:43,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1938. [2022-07-21 17:02:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1935 states have (on average 1.1488372093023256) internal successors, (2223), 1937 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2223 transitions. [2022-07-21 17:02:43,189 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2223 transitions. Word has length 104 [2022-07-21 17:02:43,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:43,189 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2223 transitions. [2022-07-21 17:02:43,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.8636363636363638) internal successors, (255), 67 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2223 transitions. [2022-07-21 17:02:43,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-21 17:02:43,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:43,191 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:43,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:43,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:43,424 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:02:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash -535539866, now seen corresponding path program 22 times [2022-07-21 17:02:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:43,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752851226] [2022-07-21 17:02:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:43,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 15 proven. 176 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:02:43,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752851226] [2022-07-21 17:02:43,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752851226] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844962919] [2022-07-21 17:02:43,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:02:43,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:43,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:43,587 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:02:43,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-21 17:02:43,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:02:43,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:43,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-21 17:02:43,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:43,804 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:02:43,805 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:02:43,809 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 10 treesize of output 8 [2022-07-21 17:02:43,998 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 16 treesize of output 12 [2022-07-21 17:02:44,018 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 19 treesize of output 21 [2022-07-21 17:02:44,464 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-21 17:02:44,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2022-07-21 17:02:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 32 proven. 159 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:02:44,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:45,644 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:45,644 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 64 treesize of output 42 [2022-07-21 17:02:45,657 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:45,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2022-07-21 17:02:45,665 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:02:45,665 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 68 treesize of output 64 [2022-07-21 17:02:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 45 proven. 146 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:02:47,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844962919] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:47,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:47,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 23] total 59 [2022-07-21 17:02:47,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132849829] [2022-07-21 17:02:47,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:47,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-21 17:02:47,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-21 17:02:47,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=3208, Unknown=20, NotChecked=0, Total=3540 [2022-07-21 17:02:47,217 INFO L87 Difference]: Start difference. First operand 1938 states and 2223 transitions. Second operand has 60 states, 59 states have (on average 4.440677966101695) internal successors, (262), 60 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:51,661 INFO L93 Difference]: Finished difference Result 3254 states and 3693 transitions. [2022-07-21 17:02:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-21 17:02:51,661 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.440677966101695) internal successors, (262), 60 states have internal predecessors, (262), 0 states have call successors, (0), 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 104 [2022-07-21 17:02:51,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:51,664 INFO L225 Difference]: With dead ends: 3254 [2022-07-21 17:02:51,664 INFO L226 Difference]: Without dead ends: 3254 [2022-07-21 17:02:51,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3713 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1620, Invalid=14090, Unknown=40, NotChecked=0, Total=15750 [2022-07-21 17:02:51,665 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 292 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 2299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1077 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:51,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 886 Invalid, 2299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1161 Invalid, 0 Unknown, 1077 Unchecked, 0.4s Time] [2022-07-21 17:02:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2022-07-21 17:02:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 2766. [2022-07-21 17:02:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2763 states have (on average 1.1433224755700326) internal successors, (3159), 2765 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3159 transitions. [2022-07-21 17:02:51,683 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3159 transitions. Word has length 104 [2022-07-21 17:02:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:51,683 INFO L495 AbstractCegarLoop]: Abstraction has 2766 states and 3159 transitions. [2022-07-21 17:02:51,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.440677966101695) internal successors, (262), 60 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3159 transitions. [2022-07-21 17:02:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-21 17:02:51,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:51,685 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:51,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:51,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:51,902 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:02:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1745896785, now seen corresponding path program 23 times [2022-07-21 17:02:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:51,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481631001] [2022-07-21 17:02:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:51,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 30 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:02:52,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:52,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481631001] [2022-07-21 17:02:52,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481631001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:52,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525967934] [2022-07-21 17:02:52,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:02:52,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:52,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:52,746 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:02:52,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-21 17:02:52,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 17:02:52,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:52,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 17:02:52,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:53,165 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 14 treesize of output 10 [2022-07-21 17:02:53,666 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 17:02:53,666 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 18 treesize of output 10 [2022-07-21 17:02:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 17:02:53,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:53,972 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 13 [2022-07-21 17:02:53,973 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 26 treesize of output 22 [2022-07-21 17:02:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 17:02:54,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525967934] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:54,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:54,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 18, 18] total 56 [2022-07-21 17:02:54,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636827025] [2022-07-21 17:02:54,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:54,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-21 17:02:54,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:54,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-21 17:02:54,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2924, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 17:02:54,139 INFO L87 Difference]: Start difference. First operand 2766 states and 3159 transitions. Second operand has 56 states, 56 states have (on average 3.9642857142857144) internal successors, (222), 56 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:56,789 INFO L93 Difference]: Finished difference Result 3825 states and 4291 transitions. [2022-07-21 17:02:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-21 17:02:56,789 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.9642857142857144) internal successors, (222), 56 states have internal predecessors, (222), 0 states have call successors, (0), 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 104 [2022-07-21 17:02:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:56,791 INFO L225 Difference]: With dead ends: 3825 [2022-07-21 17:02:56,791 INFO L226 Difference]: Without dead ends: 3813 [2022-07-21 17:02:56,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 179 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 2167 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=647, Invalid=9453, Unknown=0, NotChecked=0, Total=10100 [2022-07-21 17:02:56,792 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 476 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 3989 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 3432 SdHoareTripleChecker+Invalid, 4365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:56,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 3432 Invalid, 4365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3989 Invalid, 0 Unknown, 330 Unchecked, 1.1s Time] [2022-07-21 17:02:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-07-21 17:02:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 2928. [2022-07-21 17:02:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2925 states have (on average 1.1429059829059829) internal successors, (3343), 2927 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 3343 transitions. [2022-07-21 17:02:56,810 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 3343 transitions. Word has length 104 [2022-07-21 17:02:56,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:56,810 INFO L495 AbstractCegarLoop]: Abstraction has 2928 states and 3343 transitions. [2022-07-21 17:02:56,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.9642857142857144) internal successors, (222), 56 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 3343 transitions. [2022-07-21 17:02:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-21 17:02:56,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:56,812 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:56,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:57,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:57,020 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:02:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash -633722519, now seen corresponding path program 9 times [2022-07-21 17:02:57,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:02:57,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239781388] [2022-07-21 17:02:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:02:57,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:02:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:02:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 25 proven. 206 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:02:57,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:02:57,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239781388] [2022-07-21 17:02:57,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239781388] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:02:57,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721592921] [2022-07-21 17:02:57,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:02:57,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:02:57,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:02:57,416 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:02:57,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-21 17:02:57,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-21 17:02:57,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 17:02:57,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:57,930 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 14 treesize of output 10 [2022-07-21 17:02:58,115 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 [2022-07-21 17:02:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 12 proven. 189 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:02:58,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:58,236 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 13 [2022-07-21 17:02:58,237 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 26 treesize of output 22 [2022-07-21 17:02:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 12 proven. 189 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:02:58,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721592921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:58,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:02:58,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 43 [2022-07-21 17:02:58,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50954964] [2022-07-21 17:02:58,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:58,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 17:02:58,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:02:58,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 17:02:58,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1673, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 17:02:58,413 INFO L87 Difference]: Start difference. First operand 2928 states and 3343 transitions. Second operand has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:59,992 INFO L93 Difference]: Finished difference Result 3734 states and 4216 transitions. [2022-07-21 17:02:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 17:02:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 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 104 [2022-07-21 17:02:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:59,995 INFO L225 Difference]: With dead ends: 3734 [2022-07-21 17:02:59,995 INFO L226 Difference]: Without dead ends: 3707 [2022-07-21 17:02:59,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 188 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=661, Invalid=5039, Unknown=0, NotChecked=0, Total=5700 [2022-07-21 17:02:59,995 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1404 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1404 SdHoareTripleChecker+Valid, 2394 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:59,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1404 Valid, 2394 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2371 Invalid, 0 Unknown, 200 Unchecked, 0.7s Time] [2022-07-21 17:02:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2022-07-21 17:03:00,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 3518. [2022-07-21 17:03:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 3515 states have (on average 1.1428165007112376) internal successors, (4017), 3517 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 4017 transitions. [2022-07-21 17:03:00,017 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 4017 transitions. Word has length 104 [2022-07-21 17:03:00,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:00,017 INFO L495 AbstractCegarLoop]: Abstraction has 3518 states and 4017 transitions. [2022-07-21 17:03:00,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 4017 transitions. [2022-07-21 17:03:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-21 17:03:00,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:00,020 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:00,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:00,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-07-21 17:03:00,232 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:03:00,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1463300938, now seen corresponding path program 11 times [2022-07-21 17:03:00,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:00,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543975868] [2022-07-21 17:03:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:00,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 51 proven. 165 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:03:00,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:00,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543975868] [2022-07-21 17:03:00,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543975868] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:00,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112048019] [2022-07-21 17:03:00,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:03:00,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:00,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:00,676 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:00,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-21 17:03:00,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 17:03:00,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:00,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 17:03:00,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:00,885 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 10 treesize of output 8 [2022-07-21 17:03:01,202 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 14 treesize of output 10 [2022-07-21 17:03:01,240 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 17 treesize of output 19 [2022-07-21 17:03:01,529 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 [2022-07-21 17:03:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 51 proven. 165 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:03:01,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:01,640 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2747 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2747) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:03:01,644 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:01,644 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 23 treesize of output 24 [2022-07-21 17:03:01,649 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:01,649 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 37 treesize of output 37 [2022-07-21 17:03:01,651 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 [2022-07-21 17:03:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 51 proven. 165 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:03:02,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112048019] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:02,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:02,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 49 [2022-07-21 17:03:02,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782647037] [2022-07-21 17:03:02,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:02,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:03:02,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:02,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:03:02,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2120, Unknown=1, NotChecked=92, Total=2352 [2022-07-21 17:03:02,015 INFO L87 Difference]: Start difference. First operand 3518 states and 4017 transitions. Second operand has 49 states, 49 states have (on average 4.6938775510204085) internal successors, (230), 49 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:02,880 INFO L93 Difference]: Finished difference Result 5754 states and 6508 transitions. [2022-07-21 17:03:02,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:03:02,881 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.6938775510204085) internal successors, (230), 49 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-21 17:03:02,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:02,884 INFO L225 Difference]: With dead ends: 5754 [2022-07-21 17:03:02,884 INFO L226 Difference]: Without dead ends: 5433 [2022-07-21 17:03:02,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=2885, Unknown=1, NotChecked=108, Total=3192 [2022-07-21 17:03:02,884 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 108 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:02,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1484 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1874 Invalid, 0 Unknown, 109 Unchecked, 0.7s Time] [2022-07-21 17:03:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5433 states. [2022-07-21 17:03:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5433 to 4784. [2022-07-21 17:03:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4784 states, 4781 states have (on average 1.1340723697971136) internal successors, (5422), 4783 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4784 states to 4784 states and 5422 transitions. [2022-07-21 17:03:02,915 INFO L78 Accepts]: Start accepts. Automaton has 4784 states and 5422 transitions. Word has length 106 [2022-07-21 17:03:02,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:02,916 INFO L495 AbstractCegarLoop]: Abstraction has 4784 states and 5422 transitions. [2022-07-21 17:03:02,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.6938775510204085) internal successors, (230), 49 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4784 states and 5422 transitions. [2022-07-21 17:03:02,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-21 17:03:02,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:02,919 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:02,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-21 17:03:03,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2022-07-21 17:03:03,119 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:03:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:03,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1209646406, now seen corresponding path program 4 times [2022-07-21 17:03:03,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:03,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410328562] [2022-07-21 17:03:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:03,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 31 proven. 209 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:03:03,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:03,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410328562] [2022-07-21 17:03:03,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410328562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:03,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828359027] [2022-07-21 17:03:03,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:03:03,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:03,506 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:03,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-21 17:03:03,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:03:03,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:03,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 17:03:03,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:03,707 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:03:03,708 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:03:03,962 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 [2022-07-21 17:03:04,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:03:04,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-21 17:03:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 77 proven. 98 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-21 17:03:04,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:04,987 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 13 treesize of output 11 [2022-07-21 17:03:04,989 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 20 treesize of output 18 [2022-07-21 17:03:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 70 proven. 105 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-21 17:03:05,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828359027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:05,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:05,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 54 [2022-07-21 17:03:05,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164025348] [2022-07-21 17:03:05,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:05,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 17:03:05,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:05,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 17:03:05,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2632, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 17:03:05,526 INFO L87 Difference]: Start difference. First operand 4784 states and 5422 transitions. Second operand has 54 states, 54 states have (on average 4.407407407407407) internal successors, (238), 54 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:06,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:06,896 INFO L93 Difference]: Finished difference Result 4873 states and 5477 transitions. [2022-07-21 17:03:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 17:03:06,896 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.407407407407407) internal successors, (238), 54 states have internal predecessors, (238), 0 states have call successors, (0), 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 107 [2022-07-21 17:03:06,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:06,900 INFO L225 Difference]: With dead ends: 4873 [2022-07-21 17:03:06,900 INFO L226 Difference]: Without dead ends: 4838 [2022-07-21 17:03:06,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=839, Invalid=7533, Unknown=0, NotChecked=0, Total=8372 [2022-07-21 17:03:06,901 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 160 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:06,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1110 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 851 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-07-21 17:03:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4838 states. [2022-07-21 17:03:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4838 to 4409. [2022-07-21 17:03:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4406 states have (on average 1.129822968679074) internal successors, (4978), 4408 states have internal predecessors, (4978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 4978 transitions. [2022-07-21 17:03:06,937 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 4978 transitions. Word has length 107 [2022-07-21 17:03:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:06,937 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 4978 transitions. [2022-07-21 17:03:06,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.407407407407407) internal successors, (238), 54 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 4978 transitions. [2022-07-21 17:03:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-21 17:03:06,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:06,940 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:06,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:07,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:07,155 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:03:07,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:07,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1171943820, now seen corresponding path program 24 times [2022-07-21 17:03:07,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:07,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786241105] [2022-07-21 17:03:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:07,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 30 proven. 158 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:03:07,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:07,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786241105] [2022-07-21 17:03:07,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786241105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:07,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440271641] [2022-07-21 17:03:07,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:03:07,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:07,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:07,697 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:07,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-21 17:03:07,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-21 17:03:07,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 131 conjunts are in the unsatisfiable core [2022-07-21 17:03:07,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:07,970 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 10 treesize of output 8 [2022-07-21 17:03:07,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:03:08,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2022-07-21 17:03:08,821 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 14 treesize of output 10 [2022-07-21 17:03:08,863 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 17 treesize of output 19 [2022-07-21 17:03:09,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:03:09,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-07-21 17:03:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 30 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:09,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:09,921 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2873 (Array Int Int))) (let ((.cse0 (select v_ArrVal_2873 (+ 3 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)))) (or (= .cse0 0) (not (= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2873) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))))))) is different from false [2022-07-21 17:03:09,939 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:09,940 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 28 treesize of output 29 [2022-07-21 17:03:09,965 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:09,965 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 48 treesize of output 48 [2022-07-21 17:03:09,970 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:09,970 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 38 treesize of output 34 [2022-07-21 17:03:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 30 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:10,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440271641] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:10,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:10,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 33] total 85 [2022-07-21 17:03:10,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203712619] [2022-07-21 17:03:10,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:10,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-21 17:03:10,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:10,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-21 17:03:10,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=6532, Unknown=1, NotChecked=164, Total=7140 [2022-07-21 17:03:10,873 INFO L87 Difference]: Start difference. First operand 4409 states and 4978 transitions. Second operand has 85 states, 85 states have (on average 3.3529411764705883) internal successors, (285), 85 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:14,085 INFO L93 Difference]: Finished difference Result 4406 states and 4955 transitions. [2022-07-21 17:03:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-21 17:03:14,086 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.3529411764705883) internal successors, (285), 85 states have internal predecessors, (285), 0 states have call successors, (0), 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 108 [2022-07-21 17:03:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:14,089 INFO L225 Difference]: With dead ends: 4406 [2022-07-21 17:03:14,089 INFO L226 Difference]: Without dead ends: 4406 [2022-07-21 17:03:14,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1389, Invalid=13866, Unknown=1, NotChecked=244, Total=15500 [2022-07-21 17:03:14,090 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 480 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1854 SdHoareTripleChecker+Invalid, 4736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2272 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:14,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 1854 Invalid, 4736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2406 Invalid, 0 Unknown, 2272 Unchecked, 0.7s Time] [2022-07-21 17:03:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2022-07-21 17:03:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 4330. [2022-07-21 17:03:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 4327 states have (on average 1.1271088513981973) internal successors, (4877), 4329 states have internal predecessors, (4877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:14,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 4877 transitions. [2022-07-21 17:03:14,133 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 4877 transitions. Word has length 108 [2022-07-21 17:03:14,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:14,134 INFO L495 AbstractCegarLoop]: Abstraction has 4330 states and 4877 transitions. [2022-07-21 17:03:14,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.3529411764705883) internal successors, (285), 85 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:14,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 4877 transitions. [2022-07-21 17:03:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-21 17:03:14,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:14,137 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:14,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:14,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:14,356 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:03:14,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:14,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2010849210, now seen corresponding path program 10 times [2022-07-21 17:03:14,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:14,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413686455] [2022-07-21 17:03:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:14,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 30 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:03:14,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:14,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413686455] [2022-07-21 17:03:14,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413686455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:14,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418587535] [2022-07-21 17:03:14,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:03:14,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:14,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:14,761 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:14,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-21 17:03:14,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:03:14,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:14,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 17:03:14,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:14,956 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 10 treesize of output 8 [2022-07-21 17:03:14,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:03:15,354 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 [2022-07-21 17:03:15,386 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 [2022-07-21 17:03:16,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:03:16,068 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-21 17:03:16,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2022-07-21 17:03:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 125 proven. 55 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 17:03:16,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:17,060 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:17,060 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 62 treesize of output 40 [2022-07-21 17:03:17,074 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:17,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2022-07-21 17:03:17,083 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:17,083 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 64 treesize of output 62 [2022-07-21 17:03:18,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:03:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 80 proven. 100 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 17:03:18,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418587535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:18,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:18,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 25] total 73 [2022-07-21 17:03:18,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729584713] [2022-07-21 17:03:18,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:18,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-21 17:03:18,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-21 17:03:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=4896, Unknown=4, NotChecked=0, Total=5256 [2022-07-21 17:03:18,035 INFO L87 Difference]: Start difference. First operand 4330 states and 4877 transitions. Second operand has 73 states, 73 states have (on average 3.493150684931507) internal successors, (255), 73 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:20,052 INFO L93 Difference]: Finished difference Result 4524 states and 5076 transitions. [2022-07-21 17:03:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-21 17:03:20,052 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.493150684931507) internal successors, (255), 73 states have internal predecessors, (255), 0 states have call successors, (0), 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 108 [2022-07-21 17:03:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:20,055 INFO L225 Difference]: With dead ends: 4524 [2022-07-21 17:03:20,055 INFO L226 Difference]: Without dead ends: 4524 [2022-07-21 17:03:20,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=888, Invalid=10450, Unknown=4, NotChecked=0, Total=11342 [2022-07-21 17:03:20,056 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 295 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 3278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1671 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:20,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1910 Invalid, 3278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1573 Invalid, 0 Unknown, 1671 Unchecked, 0.6s Time] [2022-07-21 17:03:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4524 states. [2022-07-21 17:03:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4524 to 4322. [2022-07-21 17:03:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4319 states have (on average 1.1264181523500811) internal successors, (4865), 4321 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 4865 transitions. [2022-07-21 17:03:20,080 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 4865 transitions. Word has length 108 [2022-07-21 17:03:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:20,081 INFO L495 AbstractCegarLoop]: Abstraction has 4322 states and 4865 transitions. [2022-07-21 17:03:20,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.493150684931507) internal successors, (255), 73 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 4865 transitions. [2022-07-21 17:03:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-21 17:03:20,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:20,084 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:20,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:20,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:20,301 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:03:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:20,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1723286055, now seen corresponding path program 12 times [2022-07-21 17:03:20,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:20,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410972958] [2022-07-21 17:03:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:20,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 28 proven. 209 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:03:20,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:20,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410972958] [2022-07-21 17:03:20,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410972958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:20,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848057219] [2022-07-21 17:03:20,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:03:20,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:20,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:20,471 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:20,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-21 17:03:20,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-21 17:03:20,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:20,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 17:03:20,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 192 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:03:21,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:21,490 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 [2022-07-21 17:03:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 66 proven. 171 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:03:21,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848057219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:21,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:21,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 43 [2022-07-21 17:03:21,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332835116] [2022-07-21 17:03:21,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:21,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-21 17:03:21,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:21,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-21 17:03:21,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 17:03:21,742 INFO L87 Difference]: Start difference. First operand 4322 states and 4865 transitions. Second operand has 44 states, 43 states have (on average 6.534883720930233) internal successors, (281), 44 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:22,660 INFO L93 Difference]: Finished difference Result 5028 states and 5670 transitions. [2022-07-21 17:03:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:03:22,660 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 6.534883720930233) internal successors, (281), 44 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-07-21 17:03:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:22,663 INFO L225 Difference]: With dead ends: 5028 [2022-07-21 17:03:22,663 INFO L226 Difference]: Without dead ends: 5028 [2022-07-21 17:03:22,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=788, Invalid=2872, Unknown=0, NotChecked=0, Total=3660 [2022-07-21 17:03:22,664 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1056 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:22,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1056 Valid, 593 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:03:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5028 states. [2022-07-21 17:03:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5028 to 4672. [2022-07-21 17:03:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4669 states have (on average 1.1304347826086956) internal successors, (5278), 4671 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 5278 transitions. [2022-07-21 17:03:22,692 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 5278 transitions. Word has length 110 [2022-07-21 17:03:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:22,692 INFO L495 AbstractCegarLoop]: Abstraction has 4672 states and 5278 transitions. [2022-07-21 17:03:22,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 6.534883720930233) internal successors, (281), 44 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 5278 transitions. [2022-07-21 17:03:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-21 17:03:22,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:22,696 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:22,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:22,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:22,896 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:03:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash -68855594, now seen corresponding path program 25 times [2022-07-21 17:03:22,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:22,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132337029] [2022-07-21 17:03:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:22,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 15 proven. 216 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 17:03:23,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:23,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132337029] [2022-07-21 17:03:23,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132337029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:23,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660190148] [2022-07-21 17:03:23,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:03:23,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:23,037 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:23,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-21 17:03:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:23,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-21 17:03:23,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:23,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:03:23,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:03:23,251 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 10 treesize of output 8 [2022-07-21 17:03:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 28 proven. 203 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 17:03:23,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 45 proven. 186 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 17:03:24,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660190148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:24,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:24,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-07-21 17:03:24,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754498824] [2022-07-21 17:03:24,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:24,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 17:03:24,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:24,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 17:03:24,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 17:03:24,007 INFO L87 Difference]: Start difference. First operand 4672 states and 5278 transitions. Second operand has 43 states, 42 states have (on average 6.095238095238095) internal successors, (256), 43 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:24,943 INFO L93 Difference]: Finished difference Result 5056 states and 5652 transitions. [2022-07-21 17:03:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 17:03:24,943 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 6.095238095238095) internal successors, (256), 43 states have internal predecessors, (256), 0 states have call successors, (0), 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 [2022-07-21 17:03:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:24,947 INFO L225 Difference]: With dead ends: 5056 [2022-07-21 17:03:24,947 INFO L226 Difference]: Without dead ends: 5056 [2022-07-21 17:03:24,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1024, Invalid=4088, Unknown=0, NotChecked=0, Total=5112 [2022-07-21 17:03:24,949 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1701 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:24,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1701 Valid, 584 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:03:24,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2022-07-21 17:03:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 4601. [2022-07-21 17:03:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4598 states have (on average 1.1309264897781643) internal successors, (5200), 4600 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 5200 transitions. [2022-07-21 17:03:24,999 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 5200 transitions. Word has length 111 [2022-07-21 17:03:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:24,999 INFO L495 AbstractCegarLoop]: Abstraction has 4601 states and 5200 transitions. [2022-07-21 17:03:24,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 6.095238095238095) internal successors, (256), 43 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 5200 transitions. [2022-07-21 17:03:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-21 17:03:25,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:25,002 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:25,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-07-21 17:03:25,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-07-21 17:03:25,220 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:03:25,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1746153090, now seen corresponding path program 26 times [2022-07-21 17:03:25,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:25,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259978881] [2022-07-21 17:03:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:25,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 28 proven. 223 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:03:25,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:25,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259978881] [2022-07-21 17:03:25,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259978881] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:25,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390227669] [2022-07-21 17:03:25,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:03:25,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:25,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:25,369 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:25,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-21 17:03:25,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:03:25,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:25,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 17:03:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 206 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:03:25,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:26,016 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 5 treesize of output 3 [2022-07-21 17:03:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 206 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:03:26,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390227669] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:26,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:26,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 37 [2022-07-21 17:03:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452553671] [2022-07-21 17:03:26,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:26,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 17:03:26,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:26,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 17:03:26,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 17:03:26,054 INFO L87 Difference]: Start difference. First operand 4601 states and 5200 transitions. Second operand has 38 states, 37 states have (on average 6.108108108108108) internal successors, (226), 38 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:26,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:26,819 INFO L93 Difference]: Finished difference Result 4745 states and 5318 transitions. [2022-07-21 17:03:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 17:03:26,820 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 6.108108108108108) internal successors, (226), 38 states have internal predecessors, (226), 0 states have call successors, (0), 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 [2022-07-21 17:03:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:26,823 INFO L225 Difference]: With dead ends: 4745 [2022-07-21 17:03:26,823 INFO L226 Difference]: Without dead ends: 4745 [2022-07-21 17:03:26,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=850, Invalid=3182, Unknown=0, NotChecked=0, Total=4032 [2022-07-21 17:03:26,824 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 906 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:26,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 666 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:03:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4745 states. [2022-07-21 17:03:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4745 to 4601. [2022-07-21 17:03:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4598 states have (on average 1.1283166594171379) internal successors, (5188), 4600 states have internal predecessors, (5188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 5188 transitions. [2022-07-21 17:03:26,850 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 5188 transitions. Word has length 112 [2022-07-21 17:03:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:26,850 INFO L495 AbstractCegarLoop]: Abstraction has 4601 states and 5188 transitions. [2022-07-21 17:03:26,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 6.108108108108108) internal successors, (226), 38 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 5188 transitions. [2022-07-21 17:03:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-21 17:03:26,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:26,853 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:26,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:27,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:27,067 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:03:27,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1909538089, now seen corresponding path program 27 times [2022-07-21 17:03:27,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:27,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109552484] [2022-07-21 17:03:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:27,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 28 proven. 181 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:03:27,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:27,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109552484] [2022-07-21 17:03:27,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109552484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:27,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353334463] [2022-07-21 17:03:27,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:03:27,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:27,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:27,262 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:27,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-21 17:03:27,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 17:03:27,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:27,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 17:03:27,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:27,508 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 10 treesize of output 8 [2022-07-21 17:03:27,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:03:27,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:03:27,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:03:27,926 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-21 17:03:27,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2022-07-21 17:03:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-07-21 17:03:28,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:28,945 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:28,945 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 62 treesize of output 40 [2022-07-21 17:03:28,956 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:28,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2022-07-21 17:03:28,964 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:28,964 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 64 treesize of output 62 [2022-07-21 17:03:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-07-21 17:03:29,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353334463] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:29,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:29,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 41 [2022-07-21 17:03:29,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115012997] [2022-07-21 17:03:29,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:29,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 17:03:29,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:29,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 17:03:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1571, Unknown=10, NotChecked=0, Total=1722 [2022-07-21 17:03:29,537 INFO L87 Difference]: Start difference. First operand 4601 states and 5188 transitions. Second operand has 42 states, 41 states have (on average 4.585365853658536) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:32,971 INFO L93 Difference]: Finished difference Result 6243 states and 6980 transitions. [2022-07-21 17:03:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-21 17:03:32,971 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.585365853658536) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 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 [2022-07-21 17:03:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:32,975 INFO L225 Difference]: With dead ends: 6243 [2022-07-21 17:03:32,975 INFO L226 Difference]: Without dead ends: 6153 [2022-07-21 17:03:32,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 198 SyntacticMatches, 7 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3428 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1592, Invalid=12203, Unknown=11, NotChecked=0, Total=13806 [2022-07-21 17:03:32,977 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 184 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 445 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:32,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 412 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1239 Invalid, 0 Unknown, 445 Unchecked, 0.5s Time] [2022-07-21 17:03:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2022-07-21 17:03:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 5634. [2022-07-21 17:03:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5631 states have (on average 1.123779080092346) internal successors, (6328), 5633 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 6328 transitions. [2022-07-21 17:03:33,031 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 6328 transitions. Word has length 112 [2022-07-21 17:03:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:33,031 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 6328 transitions. [2022-07-21 17:03:33,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.585365853658536) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 6328 transitions. [2022-07-21 17:03:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-21 17:03:33,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:33,035 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:33,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:33,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-07-21 17:03:33,247 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:03:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash -770060734, now seen corresponding path program 28 times [2022-07-21 17:03:33,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:33,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860536184] [2022-07-21 17:03:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 35 proven. 217 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:03:33,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:33,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860536184] [2022-07-21 17:03:33,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860536184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:33,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787550125] [2022-07-21 17:03:33,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:03:33,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:33,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:33,484 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:33,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-21 17:03:33,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:03:33,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:33,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-21 17:03:33,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:33,711 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 10 treesize of output 8 [2022-07-21 17:03:33,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:03:33,927 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 14 treesize of output 10 [2022-07-21 17:03:33,961 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 17 treesize of output 19 [2022-07-21 17:03:37,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:03:37,939 INFO L356 Elim1Store]: treesize reduction 2, result has 86.7 percent of original size [2022-07-21 17:03:37,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 27 [2022-07-21 17:03:37,943 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 13 treesize of output 9 [2022-07-21 17:03:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 134 proven. 124 refuted. 1 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:03:37,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:39,024 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:39,025 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 62 treesize of output 40 [2022-07-21 17:03:39,040 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:39,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2022-07-21 17:03:39,050 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:39,050 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 64 treesize of output 62 [2022-07-21 17:03:39,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:03:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 130 proven. 122 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:03:39,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787550125] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:39,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:39,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 66 [2022-07-21 17:03:39,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499961339] [2022-07-21 17:03:39,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:39,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 17:03:39,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 17:03:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=4006, Unknown=2, NotChecked=0, Total=4290 [2022-07-21 17:03:39,966 INFO L87 Difference]: Start difference. First operand 5634 states and 6328 transitions. Second operand has 66 states, 66 states have (on average 4.363636363636363) internal successors, (288), 66 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:43,663 INFO L93 Difference]: Finished difference Result 5645 states and 6313 transitions. [2022-07-21 17:03:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 17:03:43,663 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.363636363636363) internal successors, (288), 66 states have internal predecessors, (288), 0 states have call successors, (0), 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 115 [2022-07-21 17:03:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:43,667 INFO L225 Difference]: With dead ends: 5645 [2022-07-21 17:03:43,667 INFO L226 Difference]: Without dead ends: 5080 [2022-07-21 17:03:43,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=761, Invalid=8939, Unknown=2, NotChecked=0, Total=9702 [2022-07-21 17:03:43,668 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 233 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1465 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:43,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1419 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 766 Invalid, 0 Unknown, 1465 Unchecked, 0.2s Time] [2022-07-21 17:03:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2022-07-21 17:03:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 4960. [2022-07-21 17:03:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4957 states have (on average 1.1234617712326003) internal successors, (5569), 4959 states have internal predecessors, (5569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 5569 transitions. [2022-07-21 17:03:43,707 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 5569 transitions. Word has length 115 [2022-07-21 17:03:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:43,707 INFO L495 AbstractCegarLoop]: Abstraction has 4960 states and 5569 transitions. [2022-07-21 17:03:43,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.363636363636363) internal successors, (288), 66 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 5569 transitions. [2022-07-21 17:03:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-21 17:03:43,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:43,710 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:43,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:43,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-07-21 17:03:43,928 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:03:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash 987947017, now seen corresponding path program 29 times [2022-07-21 17:03:43,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:43,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272641788] [2022-07-21 17:03:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:43,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 35 proven. 231 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:03:44,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:44,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272641788] [2022-07-21 17:03:44,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272641788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:44,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687153790] [2022-07-21 17:03:44,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:03:44,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:44,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:44,516 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:44,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-21 17:03:44,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 17:03:44,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:44,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 115 conjunts are in the unsatisfiable core [2022-07-21 17:03:44,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:44,790 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:03:44,790 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:03:45,287 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 [2022-07-21 17:03:45,381 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 [2022-07-21 17:03:45,478 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 14 treesize of output 10 [2022-07-21 17:03:45,483 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:03:45,483 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 13 treesize of output 13 [2022-07-21 17:03:45,537 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 25 treesize of output 24 [2022-07-21 17:03:46,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:03:46,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 14 [2022-07-21 17:03:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 35 proven. 231 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:03:46,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:48,285 INFO L356 Elim1Store]: treesize reduction 189, result has 35.5 percent of original size [2022-07-21 17:03:48,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 5573 treesize of output 2857 [2022-07-21 17:03:48,307 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:48,308 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 2857 treesize of output 2727 [2022-07-21 17:03:48,694 INFO L356 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2022-07-21 17:03:48,694 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 28 treesize of output 22 [2022-07-21 17:03:48,737 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:03:48,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 158 [2022-07-21 17:03:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 35 proven. 231 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:03:50,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687153790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:50,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:50,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 34] total 88 [2022-07-21 17:03:50,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375326389] [2022-07-21 17:03:50,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:50,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-07-21 17:03:50,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:50,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-07-21 17:03:50,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=7252, Unknown=0, NotChecked=0, Total=7656 [2022-07-21 17:03:50,889 INFO L87 Difference]: Start difference. First operand 4960 states and 5569 transitions. Second operand has 88 states, 88 states have (on average 3.4431818181818183) internal successors, (303), 88 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:57,048 INFO L93 Difference]: Finished difference Result 4894 states and 5487 transitions. [2022-07-21 17:03:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-21 17:03:57,049 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.4431818181818183) internal successors, (303), 88 states have internal predecessors, (303), 0 states have call successors, (0), 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 115 [2022-07-21 17:03:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:57,052 INFO L225 Difference]: With dead ends: 4894 [2022-07-21 17:03:57,052 INFO L226 Difference]: Without dead ends: 4110 [2022-07-21 17:03:57,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 177 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4809 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1160, Invalid=18022, Unknown=0, NotChecked=0, Total=19182 [2022-07-21 17:03:57,054 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 830 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 4099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1480 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:57,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 1767 Invalid, 4099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2517 Invalid, 0 Unknown, 1480 Unchecked, 1.2s Time] [2022-07-21 17:03:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2022-07-21 17:03:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 4107. [2022-07-21 17:03:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4107 states, 4104 states have (on average 1.1335282651072125) internal successors, (4652), 4106 states have internal predecessors, (4652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4107 states to 4107 states and 4652 transitions. [2022-07-21 17:03:57,083 INFO L78 Accepts]: Start accepts. Automaton has 4107 states and 4652 transitions. Word has length 115 [2022-07-21 17:03:57,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:57,083 INFO L495 AbstractCegarLoop]: Abstraction has 4107 states and 4652 transitions. [2022-07-21 17:03:57,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.4431818181818183) internal successors, (303), 88 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4107 states and 4652 transitions. [2022-07-21 17:03:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-21 17:03:57,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:57,085 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:03:57,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:57,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-07-21 17:03:57,304 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:03:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:57,304 INFO L85 PathProgramCache]: Analyzing trace with hash 675387599, now seen corresponding path program 30 times [2022-07-21 17:03:57,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:03:57,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171361791] [2022-07-21 17:03:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:03:57,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:03:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:03:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 28 proven. 215 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 17:03:57,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:03:57,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171361791] [2022-07-21 17:03:57,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171361791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:03:57,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714532351] [2022-07-21 17:03:57,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:03:57,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:03:57,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:03:57,439 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:03:57,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-21 17:03:57,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-21 17:03:57,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:57,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 17:03:57,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:57,816 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 14 treesize of output 10 [2022-07-21 17:03:58,182 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 17:03:58,182 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 18 treesize of output 10 [2022-07-21 17:03:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 14 proven. 206 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-21 17:03:58,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:58,410 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 13 [2022-07-21 17:03:58,411 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 26 treesize of output 22 [2022-07-21 17:03:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 14 proven. 206 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-21 17:03:58,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714532351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:58,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:03:58,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 46 [2022-07-21 17:03:58,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138613454] [2022-07-21 17:03:58,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:58,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 17:03:58,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:03:58,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 17:03:58,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1947, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 17:03:58,508 INFO L87 Difference]: Start difference. First operand 4107 states and 4652 transitions. Second operand has 46 states, 46 states have (on average 5.065217391304348) internal successors, (233), 46 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:01,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:01,702 INFO L93 Difference]: Finished difference Result 4169 states and 4665 transitions. [2022-07-21 17:04:01,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-21 17:04:01,702 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.065217391304348) internal successors, (233), 46 states have internal predecessors, (233), 0 states have call successors, (0), 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 115 [2022-07-21 17:04:01,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:01,705 INFO L225 Difference]: With dead ends: 4169 [2022-07-21 17:04:01,705 INFO L226 Difference]: Without dead ends: 4145 [2022-07-21 17:04:01,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 198 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 4761 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1235, Invalid=16057, Unknown=0, NotChecked=0, Total=17292 [2022-07-21 17:04:01,706 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1728 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 4629 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 3356 SdHoareTripleChecker+Invalid, 5505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 4629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:01,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 3356 Invalid, 5505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 4629 Invalid, 0 Unknown, 697 Unchecked, 1.2s Time] [2022-07-21 17:04:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4145 states. [2022-07-21 17:04:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4145 to 3972. [2022-07-21 17:04:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3969 states have (on average 1.127739984882842) internal successors, (4476), 3971 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 4476 transitions. [2022-07-21 17:04:01,759 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 4476 transitions. Word has length 115 [2022-07-21 17:04:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:01,759 INFO L495 AbstractCegarLoop]: Abstraction has 3972 states and 4476 transitions. [2022-07-21 17:04:01,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.065217391304348) internal successors, (233), 46 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 4476 transitions. [2022-07-21 17:04:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-21 17:04:01,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:01,762 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:01,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:01,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:01,982 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:01,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1613237987, now seen corresponding path program 10 times [2022-07-21 17:04:01,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:01,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201672523] [2022-07-21 17:04:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:01,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 45 proven. 200 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:04:02,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201672523] [2022-07-21 17:04:02,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201672523] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030857314] [2022-07-21 17:04:02,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:04:02,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:02,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:02,207 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:02,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-21 17:04:02,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:04:02,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:02,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 17:04:02,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:02,432 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:04:02,432 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:04:02,769 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 16 treesize of output 12 [2022-07-21 17:04:03,262 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:03,262 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 19 treesize of output 19 [2022-07-21 17:04:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 72 proven. 173 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:04:03,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:03,975 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 13 [2022-07-21 17:04:03,976 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 26 treesize of output 22 [2022-07-21 17:04:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 91 proven. 154 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:04:04,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030857314] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:04,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:04,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 65 [2022-07-21 17:04:04,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455309645] [2022-07-21 17:04:04,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:04,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-21 17:04:04,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:04,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-21 17:04:04,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=3867, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 17:04:04,792 INFO L87 Difference]: Start difference. First operand 3972 states and 4476 transitions. Second operand has 66 states, 65 states have (on average 4.2615384615384615) internal successors, (277), 66 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:07,281 INFO L93 Difference]: Finished difference Result 4051 states and 4547 transitions. [2022-07-21 17:04:07,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 17:04:07,282 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.2615384615384615) internal successors, (277), 66 states have internal predecessors, (277), 0 states have call successors, (0), 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 115 [2022-07-21 17:04:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:07,285 INFO L225 Difference]: With dead ends: 4051 [2022-07-21 17:04:07,285 INFO L226 Difference]: Without dead ends: 4051 [2022-07-21 17:04:07,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1996, Invalid=8716, Unknown=0, NotChecked=0, Total=10712 [2022-07-21 17:04:07,286 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 789 mSDsluCounter, 2063 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 3984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:07,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 2197 Invalid, 3984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3806 Invalid, 0 Unknown, 118 Unchecked, 1.2s Time] [2022-07-21 17:04:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2022-07-21 17:04:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3986. [2022-07-21 17:04:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3986 states, 3983 states have (on average 1.127793120763244) internal successors, (4492), 3985 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 4492 transitions. [2022-07-21 17:04:07,314 INFO L78 Accepts]: Start accepts. Automaton has 3986 states and 4492 transitions. Word has length 115 [2022-07-21 17:04:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:07,314 INFO L495 AbstractCegarLoop]: Abstraction has 3986 states and 4492 transitions. [2022-07-21 17:04:07,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.2615384615384615) internal successors, (277), 66 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:07,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3986 states and 4492 transitions. [2022-07-21 17:04:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-21 17:04:07,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:07,317 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:07,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:07,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:07,532 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:07,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash 16289344, now seen corresponding path program 13 times [2022-07-21 17:04:07,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:07,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30828937] [2022-07-21 17:04:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:07,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 61 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:08,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:08,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30828937] [2022-07-21 17:04:08,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30828937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:08,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659984007] [2022-07-21 17:04:08,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:04:08,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:08,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:08,018 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:08,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-21 17:04:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:08,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-21 17:04:08,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:08,518 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 14 treesize of output 10 [2022-07-21 17:04:08,555 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:04:08,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 17 treesize of output 23 [2022-07-21 17:04:08,559 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 8 treesize of output 3 [2022-07-21 17:04:09,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:09,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:04:09,453 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 17:04:09,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 18 [2022-07-21 17:04:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 61 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:09,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:09,808 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:09,809 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 47 treesize of output 36 [2022-07-21 17:04:09,822 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-21 17:04:09,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 61 [2022-07-21 17:04:09,836 INFO L356 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-07-21 17:04:09,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 41 [2022-07-21 17:04:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 61 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:10,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659984007] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:10,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:10,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 65 [2022-07-21 17:04:10,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841182383] [2022-07-21 17:04:10,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:10,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-21 17:04:10,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:10,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-21 17:04:10,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3938, Unknown=4, NotChecked=0, Total=4160 [2022-07-21 17:04:10,287 INFO L87 Difference]: Start difference. First operand 3986 states and 4492 transitions. Second operand has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:10,911 INFO L93 Difference]: Finished difference Result 4520 states and 5063 transitions. [2022-07-21 17:04:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 17:04:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 0 states have call successors, (0), 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 [2022-07-21 17:04:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:10,914 INFO L225 Difference]: With dead ends: 4520 [2022-07-21 17:04:10,915 INFO L226 Difference]: Without dead ends: 4425 [2022-07-21 17:04:10,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=304, Invalid=5698, Unknown=4, NotChecked=0, Total=6006 [2022-07-21 17:04:10,916 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 65 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:10,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1340 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 882 Invalid, 0 Unknown, 538 Unchecked, 0.3s Time] [2022-07-21 17:04:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4425 states. [2022-07-21 17:04:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4425 to 4422. [2022-07-21 17:04:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4419 states have (on average 1.1235573659198914) internal successors, (4965), 4421 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 4965 transitions. [2022-07-21 17:04:10,946 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 4965 transitions. Word has length 117 [2022-07-21 17:04:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:10,946 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 4965 transitions. [2022-07-21 17:04:10,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 4965 transitions. [2022-07-21 17:04:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-21 17:04:10,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:10,949 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:10,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:11,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:11,164 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:11,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1458493435, now seen corresponding path program 31 times [2022-07-21 17:04:11,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:11,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658399938] [2022-07-21 17:04:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:11,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 28 proven. 245 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:04:11,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:11,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658399938] [2022-07-21 17:04:11,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658399938] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:11,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247242992] [2022-07-21 17:04:11,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:04:11,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:11,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:11,338 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:11,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-21 17:04:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:11,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 17:04:11,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:11,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:11,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:04:11,588 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 10 treesize of output 8 [2022-07-21 17:04:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:04:12,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 17:04:12,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247242992] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:12,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:12,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-07-21 17:04:12,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881138881] [2022-07-21 17:04:12,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:12,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:04:12,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:12,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:04:12,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 17:04:12,791 INFO L87 Difference]: Start difference. First operand 4422 states and 4965 transitions. Second operand has 49 states, 48 states have (on average 6.208333333333333) internal successors, (298), 49 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:14,297 INFO L93 Difference]: Finished difference Result 4679 states and 5208 transitions. [2022-07-21 17:04:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 17:04:14,299 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 6.208333333333333) internal successors, (298), 49 states have internal predecessors, (298), 0 states have call successors, (0), 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 119 [2022-07-21 17:04:14,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:14,303 INFO L225 Difference]: With dead ends: 4679 [2022-07-21 17:04:14,303 INFO L226 Difference]: Without dead ends: 4679 [2022-07-21 17:04:14,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1347, Invalid=5459, Unknown=0, NotChecked=0, Total=6806 [2022-07-21 17:04:14,304 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1450 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:14,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1450 Valid, 630 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:04:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2022-07-21 17:04:14,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4191. [2022-07-21 17:04:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 4188 states have (on average 1.1244030563514804) internal successors, (4709), 4190 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 4709 transitions. [2022-07-21 17:04:14,333 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 4709 transitions. Word has length 119 [2022-07-21 17:04:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:14,333 INFO L495 AbstractCegarLoop]: Abstraction has 4191 states and 4709 transitions. [2022-07-21 17:04:14,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 6.208333333333333) internal successors, (298), 49 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 4709 transitions. [2022-07-21 17:04:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-21 17:04:14,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:14,335 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:14,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:14,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:14,549 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:14,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash 299514316, now seen corresponding path program 32 times [2022-07-21 17:04:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:14,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368424206] [2022-07-21 17:04:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:14,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 28 proven. 231 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 17:04:14,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:14,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368424206] [2022-07-21 17:04:14,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368424206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:14,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182363672] [2022-07-21 17:04:14,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:04:14,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:14,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:14,796 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:14,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-21 17:04:15,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:04:15,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:15,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-21 17:04:15,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:15,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:15,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:04:15,069 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 10 treesize of output 8 [2022-07-21 17:04:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 45 proven. 214 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 17:04:15,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 66 proven. 193 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 17:04:16,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182363672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:16,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:16,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-07-21 17:04:16,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662207197] [2022-07-21 17:04:16,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:16,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:04:16,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:04:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 17:04:16,208 INFO L87 Difference]: Start difference. First operand 4191 states and 4709 transitions. Second operand has 49 states, 48 states have (on average 5.958333333333333) internal successors, (286), 49 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:17,400 INFO L93 Difference]: Finished difference Result 4510 states and 5017 transitions. [2022-07-21 17:04:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 17:04:17,401 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 5.958333333333333) internal successors, (286), 49 states have internal predecessors, (286), 0 states have call successors, (0), 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 119 [2022-07-21 17:04:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:17,403 INFO L225 Difference]: With dead ends: 4510 [2022-07-21 17:04:17,403 INFO L226 Difference]: Without dead ends: 4510 [2022-07-21 17:04:17,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1439, Invalid=5701, Unknown=0, NotChecked=0, Total=7140 [2022-07-21 17:04:17,404 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1326 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:17,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 639 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:04:17,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2022-07-21 17:04:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4191. [2022-07-21 17:04:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 4188 states have (on average 1.1234479465138492) internal successors, (4705), 4190 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 4705 transitions. [2022-07-21 17:04:17,427 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 4705 transitions. Word has length 119 [2022-07-21 17:04:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:17,427 INFO L495 AbstractCegarLoop]: Abstraction has 4191 states and 4705 transitions. [2022-07-21 17:04:17,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 5.958333333333333) internal successors, (286), 49 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 4705 transitions. [2022-07-21 17:04:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-21 17:04:17,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:17,429 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:17,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:17,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-07-21 17:04:17,647 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash -834729973, now seen corresponding path program 33 times [2022-07-21 17:04:17,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:17,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229826241] [2022-07-21 17:04:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:17,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 28 proven. 221 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 17:04:17,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:17,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229826241] [2022-07-21 17:04:17,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229826241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:17,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580378410] [2022-07-21 17:04:17,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:04:17,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:17,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:17,854 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:17,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-21 17:04:18,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 17:04:18,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:18,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 17:04:18,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:18,160 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 10 treesize of output 8 [2022-07-21 17:04:18,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:04:18,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:04:18,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-21 17:04:18,599 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-21 17:04:18,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2022-07-21 17:04:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 12 proven. 125 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-21 17:04:18,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:19,630 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:19,630 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 62 treesize of output 40 [2022-07-21 17:04:19,641 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:19,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2022-07-21 17:04:19,648 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:19,648 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 64 treesize of output 62 [2022-07-21 17:04:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-21 17:04:20,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580378410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:20,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:20,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 41 [2022-07-21 17:04:20,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571711330] [2022-07-21 17:04:20,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:20,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 17:04:20,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 17:04:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1570, Unknown=11, NotChecked=0, Total=1722 [2022-07-21 17:04:20,203 INFO L87 Difference]: Start difference. First operand 4191 states and 4705 transitions. Second operand has 42 states, 41 states have (on average 4.658536585365853) internal successors, (191), 42 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:23,117 INFO L93 Difference]: Finished difference Result 4312 states and 4749 transitions. [2022-07-21 17:04:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-21 17:04:23,118 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.658536585365853) internal successors, (191), 42 states have internal predecessors, (191), 0 states have call successors, (0), 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 119 [2022-07-21 17:04:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:23,121 INFO L225 Difference]: With dead ends: 4312 [2022-07-21 17:04:23,121 INFO L226 Difference]: Without dead ends: 4312 [2022-07-21 17:04:23,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 212 SyntacticMatches, 6 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4281 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1908, Invalid=13830, Unknown=12, NotChecked=0, Total=15750 [2022-07-21 17:04:23,123 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 207 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:23,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 419 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1583 Invalid, 0 Unknown, 331 Unchecked, 0.5s Time] [2022-07-21 17:04:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2022-07-21 17:04:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 2115. [2022-07-21 17:04:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2113 states have (on average 1.101751064836725) internal successors, (2328), 2114 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 2328 transitions. [2022-07-21 17:04:23,143 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 2328 transitions. Word has length 119 [2022-07-21 17:04:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:23,143 INFO L495 AbstractCegarLoop]: Abstraction has 2115 states and 2328 transitions. [2022-07-21 17:04:23,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.658536585365853) internal successors, (191), 42 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 2328 transitions. [2022-07-21 17:04:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-21 17:04:23,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:23,145 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:23,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:23,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:23,355 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:23,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:23,355 INFO L85 PathProgramCache]: Analyzing trace with hash -142572733, now seen corresponding path program 14 times [2022-07-21 17:04:23,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:23,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521243136] [2022-07-21 17:04:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:23,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 45 proven. 284 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:23,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:23,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521243136] [2022-07-21 17:04:23,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521243136] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:23,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328781335] [2022-07-21 17:04:23,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:04:23,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:23,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:23,496 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:23,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-21 17:04:23,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:04:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:23,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 17:04:23,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 66 proven. 263 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:23,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:24,202 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 5 treesize of output 3 [2022-07-21 17:04:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 66 proven. 263 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:24,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328781335] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:24,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:24,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 39 [2022-07-21 17:04:24,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041732400] [2022-07-21 17:04:24,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:24,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 17:04:24,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:24,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 17:04:24,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 17:04:24,230 INFO L87 Difference]: Start difference. First operand 2115 states and 2328 transitions. Second operand has 40 states, 39 states have (on average 6.461538461538462) internal successors, (252), 40 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:24,715 INFO L93 Difference]: Finished difference Result 4032 states and 4444 transitions. [2022-07-21 17:04:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:04:24,715 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 6.461538461538462) internal successors, (252), 40 states have internal predecessors, (252), 0 states have call successors, (0), 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 121 [2022-07-21 17:04:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:24,719 INFO L225 Difference]: With dead ends: 4032 [2022-07-21 17:04:24,719 INFO L226 Difference]: Without dead ends: 4032 [2022-07-21 17:04:24,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 218 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=514, Invalid=2138, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 17:04:24,720 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 532 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:24,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 936 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:04:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4032 states. [2022-07-21 17:04:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4032 to 2347. [2022-07-21 17:04:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2345 states have (on average 1.1019189765458421) internal successors, (2584), 2346 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 2584 transitions. [2022-07-21 17:04:24,742 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 2584 transitions. Word has length 121 [2022-07-21 17:04:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:24,742 INFO L495 AbstractCegarLoop]: Abstraction has 2347 states and 2584 transitions. [2022-07-21 17:04:24,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 6.461538461538462) internal successors, (252), 40 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 2584 transitions. [2022-07-21 17:04:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-21 17:04:24,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:24,744 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:24,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:24,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:24,957 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:24,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:24,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1509957751, now seen corresponding path program 5 times [2022-07-21 17:04:24,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:24,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982423794] [2022-07-21 17:04:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:24,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 45 proven. 250 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-21 17:04:25,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:25,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982423794] [2022-07-21 17:04:25,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982423794] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:25,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129711855] [2022-07-21 17:04:25,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:04:25,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:25,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:25,168 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:25,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-21 17:04:25,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-21 17:04:25,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:25,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 17:04:25,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:25,441 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:04:25,441 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:04:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 66 proven. 229 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-21 17:04:25,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 91 proven. 204 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-21 17:04:26,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129711855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:26,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:26,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 53 [2022-07-21 17:04:26,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495794681] [2022-07-21 17:04:26,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:26,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 17:04:26,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 17:04:26,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2477, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 17:04:26,313 INFO L87 Difference]: Start difference. First operand 2347 states and 2584 transitions. Second operand has 54 states, 53 states have (on average 5.433962264150943) internal successors, (288), 54 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:27,272 INFO L93 Difference]: Finished difference Result 2743 states and 2994 transitions. [2022-07-21 17:04:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 17:04:27,272 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 5.433962264150943) internal successors, (288), 54 states have internal predecessors, (288), 0 states have call successors, (0), 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 126 [2022-07-21 17:04:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:27,274 INFO L225 Difference]: With dead ends: 2743 [2022-07-21 17:04:27,274 INFO L226 Difference]: Without dead ends: 2743 [2022-07-21 17:04:27,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1172, Invalid=4528, Unknown=0, NotChecked=0, Total=5700 [2022-07-21 17:04:27,275 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 755 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:27,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 1224 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:04:27,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2022-07-21 17:04:27,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2389. [2022-07-21 17:04:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2387 states have (on average 1.1026392961876832) internal successors, (2632), 2388 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 2632 transitions. [2022-07-21 17:04:27,307 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 2632 transitions. Word has length 126 [2022-07-21 17:04:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:27,308 INFO L495 AbstractCegarLoop]: Abstraction has 2389 states and 2632 transitions. [2022-07-21 17:04:27,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 5.433962264150943) internal successors, (288), 54 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 2632 transitions. [2022-07-21 17:04:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-21 17:04:27,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:27,310 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:27,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:27,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-07-21 17:04:27,519 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:27,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:27,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2034437485, now seen corresponding path program 1 times [2022-07-21 17:04:27,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:27,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764887407] [2022-07-21 17:04:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:27,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 68 proven. 278 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 17:04:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764887407] [2022-07-21 17:04:27,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764887407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205066487] [2022-07-21 17:04:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:27,853 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:27,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-21 17:04:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:28,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-21 17:04:28,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:28,122 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 10 treesize of output 8 [2022-07-21 17:04:28,451 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 14 treesize of output 10 [2022-07-21 17:04:28,493 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 17 treesize of output 19 [2022-07-21 17:04:28,734 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 [2022-07-21 17:04:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 68 proven. 278 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 17:04:28,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:28,880 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3840 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3840) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:04:28,884 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:28,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 17:04:28,889 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:28,889 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 37 treesize of output 37 [2022-07-21 17:04:28,892 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 [2022-07-21 17:04:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 68 proven. 278 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 17:04:29,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205066487] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:29,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:29,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 42 [2022-07-21 17:04:29,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372662967] [2022-07-21 17:04:29,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:29,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 17:04:29,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:29,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 17:04:29,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1539, Unknown=1, NotChecked=78, Total=1722 [2022-07-21 17:04:29,157 INFO L87 Difference]: Start difference. First operand 2389 states and 2632 transitions. Second operand has 42 states, 42 states have (on average 4.357142857142857) internal successors, (183), 42 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) [2022-07-21 17:04:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:30,432 INFO L93 Difference]: Finished difference Result 3689 states and 4059 transitions. [2022-07-21 17:04:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 17:04:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.357142857142857) internal successors, (183), 42 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 128 [2022-07-21 17:04:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:30,434 INFO L225 Difference]: With dead ends: 3689 [2022-07-21 17:04:30,434 INFO L226 Difference]: Without dead ends: 2425 [2022-07-21 17:04:30,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 235 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=207, Invalid=3101, Unknown=2, NotChecked=112, Total=3422 [2022-07-21 17:04:30,435 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 121 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 2327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:30,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 1588 Invalid, 2327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2217 Invalid, 0 Unknown, 99 Unchecked, 0.7s Time] [2022-07-21 17:04:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-07-21 17:04:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2361. [2022-07-21 17:04:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2359 states have (on average 1.1089444679949132) internal successors, (2616), 2360 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 2616 transitions. [2022-07-21 17:04:30,449 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 2616 transitions. Word has length 128 [2022-07-21 17:04:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:30,449 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 2616 transitions. [2022-07-21 17:04:30,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.357142857142857) internal successors, (183), 42 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) [2022-07-21 17:04:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 2616 transitions. [2022-07-21 17:04:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-21 17:04:30,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:30,451 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:30,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:30,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-07-21 17:04:30,669 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:30,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1049209251, now seen corresponding path program 11 times [2022-07-21 17:04:30,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:30,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2364937] [2022-07-21 17:04:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:30,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 211 proven. 141 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:04:30,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:30,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2364937] [2022-07-21 17:04:30,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2364937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:30,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719084292] [2022-07-21 17:04:30,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:04:30,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:30,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:30,926 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:30,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-21 17:04:31,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-21 17:04:31,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 17:04:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:31,251 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:04:31,251 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:04:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 261 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:04:31,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 261 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 17:04:32,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719084292] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:32,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:32,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 55 [2022-07-21 17:04:32,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082821762] [2022-07-21 17:04:32,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:32,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-21 17:04:32,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:32,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-21 17:04:32,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=2462, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 17:04:32,089 INFO L87 Difference]: Start difference. First operand 2361 states and 2616 transitions. Second operand has 55 states, 55 states have (on average 4.636363636363637) internal successors, (255), 55 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:33,022 INFO L93 Difference]: Finished difference Result 4086 states and 4438 transitions. [2022-07-21 17:04:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-21 17:04:33,022 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.636363636363637) internal successors, (255), 55 states have internal predecessors, (255), 0 states have call successors, (0), 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 129 [2022-07-21 17:04:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:33,026 INFO L225 Difference]: With dead ends: 4086 [2022-07-21 17:04:33,026 INFO L226 Difference]: Without dead ends: 4084 [2022-07-21 17:04:33,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2300, Invalid=7600, Unknown=0, NotChecked=0, Total=9900 [2022-07-21 17:04:33,027 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1608 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:33,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 726 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:04:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2022-07-21 17:04:33,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 3215. [2022-07-21 17:04:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3215 states, 3213 states have (on average 1.1126672891378773) internal successors, (3575), 3214 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 3575 transitions. [2022-07-21 17:04:33,051 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 3575 transitions. Word has length 129 [2022-07-21 17:04:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:33,052 INFO L495 AbstractCegarLoop]: Abstraction has 3215 states and 3575 transitions. [2022-07-21 17:04:33,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.636363636363637) internal successors, (255), 55 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 3575 transitions. [2022-07-21 17:04:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-21 17:04:33,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:33,054 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:33,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:33,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:33,268 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:33,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:33,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1395817447, now seen corresponding path program 15 times [2022-07-21 17:04:33,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:33,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229643492] [2022-07-21 17:04:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:33,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 71 proven. 336 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:33,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:33,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229643492] [2022-07-21 17:04:33,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229643492] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:33,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100846958] [2022-07-21 17:04:33,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:04:33,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:33,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:33,533 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:33,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-21 17:04:33,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-21 17:04:33,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:33,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-21 17:04:33,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:33,877 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 10 treesize of output 8 [2022-07-21 17:04:34,113 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 14 treesize of output 10 [2022-07-21 17:04:34,151 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 17 treesize of output 19 [2022-07-21 17:04:34,514 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 [2022-07-21 17:04:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 71 proven. 336 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:34,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:34,647 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3967 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3967) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-21 17:04:34,672 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:34,673 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 23 treesize of output 24 [2022-07-21 17:04:34,676 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:34,676 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 37 treesize of output 37 [2022-07-21 17:04:34,700 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 [2022-07-21 17:04:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 71 proven. 336 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:34,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100846958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:34,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:34,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 42 [2022-07-21 17:04:34,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606201655] [2022-07-21 17:04:34,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:34,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 17:04:34,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:34,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 17:04:34,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1530, Unknown=1, NotChecked=78, Total=1722 [2022-07-21 17:04:34,985 INFO L87 Difference]: Start difference. First operand 3215 states and 3575 transitions. Second operand has 42 states, 42 states have (on average 5.357142857142857) internal successors, (225), 42 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:35,553 INFO L93 Difference]: Finished difference Result 5360 states and 5938 transitions. [2022-07-21 17:04:35,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 17:04:35,554 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.357142857142857) internal successors, (225), 42 states have internal predecessors, (225), 0 states have call successors, (0), 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 132 [2022-07-21 17:04:35,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:35,556 INFO L225 Difference]: With dead ends: 5360 [2022-07-21 17:04:35,556 INFO L226 Difference]: Without dead ends: 4125 [2022-07-21 17:04:35,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 238 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=187, Invalid=2468, Unknown=1, NotChecked=100, Total=2756 [2022-07-21 17:04:35,557 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 92 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:35,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1765 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 741 Invalid, 0 Unknown, 164 Unchecked, 0.3s Time] [2022-07-21 17:04:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2022-07-21 17:04:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3447. [2022-07-21 17:04:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3445 states have (on average 1.1132075471698113) internal successors, (3835), 3446 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 3835 transitions. [2022-07-21 17:04:35,576 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 3835 transitions. Word has length 132 [2022-07-21 17:04:35,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:35,576 INFO L495 AbstractCegarLoop]: Abstraction has 3447 states and 3835 transitions. [2022-07-21 17:04:35,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.357142857142857) internal successors, (225), 42 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 3835 transitions. [2022-07-21 17:04:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-21 17:04:35,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:35,578 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:35,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:35,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:35,797 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:35,797 INFO L85 PathProgramCache]: Analyzing trace with hash -782868425, now seen corresponding path program 6 times [2022-07-21 17:04:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:35,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630246245] [2022-07-21 17:04:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:35,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 207 proven. 122 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 17:04:36,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:36,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630246245] [2022-07-21 17:04:36,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630246245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:36,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299970757] [2022-07-21 17:04:36,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:04:36,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:36,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:36,009 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:36,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-21 17:04:36,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-21 17:04:36,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:36,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 17:04:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:36,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:36,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:04:36,527 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 10 treesize of output 8 [2022-07-21 17:04:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 213 proven. 113 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-21 17:04:37,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 213 proven. 113 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-21 17:04:37,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299970757] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:37,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:37,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 46 [2022-07-21 17:04:37,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319920450] [2022-07-21 17:04:37,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:37,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 17:04:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 17:04:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1747, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 17:04:37,510 INFO L87 Difference]: Start difference. First operand 3447 states and 3835 transitions. Second operand has 46 states, 46 states have (on average 5.565217391304348) internal successors, (256), 46 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:38,348 INFO L93 Difference]: Finished difference Result 4175 states and 4609 transitions. [2022-07-21 17:04:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:04:38,349 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.565217391304348) internal successors, (256), 46 states have internal predecessors, (256), 0 states have call successors, (0), 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 133 [2022-07-21 17:04:38,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:38,351 INFO L225 Difference]: With dead ends: 4175 [2022-07-21 17:04:38,351 INFO L226 Difference]: Without dead ends: 3444 [2022-07-21 17:04:38,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=697, Invalid=3085, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 17:04:38,352 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 255 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:38,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 649 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:04:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2022-07-21 17:04:38,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3386. [2022-07-21 17:04:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3384 states have (on average 1.1125886524822695) internal successors, (3765), 3385 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 3765 transitions. [2022-07-21 17:04:38,371 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 3765 transitions. Word has length 133 [2022-07-21 17:04:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:38,371 INFO L495 AbstractCegarLoop]: Abstraction has 3386 states and 3765 transitions. [2022-07-21 17:04:38,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.565217391304348) internal successors, (256), 46 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 3765 transitions. [2022-07-21 17:04:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-21 17:04:38,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:38,373 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:38,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-07-21 17:04:38,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-07-21 17:04:38,573 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:38,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:38,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1429738854, now seen corresponding path program 12 times [2022-07-21 17:04:38,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:38,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516988925] [2022-07-21 17:04:38,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:38,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 207 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-21 17:04:38,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:38,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516988925] [2022-07-21 17:04:38,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516988925] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:38,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964493473] [2022-07-21 17:04:38,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:04:38,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:38,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:38,784 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:38,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-21 17:04:39,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-21 17:04:39,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:39,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 17:04:39,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:04:39,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 17:04:39,439 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 10 treesize of output 8 [2022-07-21 17:04:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 261 proven. 66 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-21 17:04:40,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 261 proven. 66 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-21 17:04:40,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964493473] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:40,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:40,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 49 [2022-07-21 17:04:40,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661565790] [2022-07-21 17:04:40,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:40,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:04:40,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:40,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:04:40,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=1954, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 17:04:40,536 INFO L87 Difference]: Start difference. First operand 3386 states and 3765 transitions. Second operand has 49 states, 49 states have (on average 5.204081632653061) internal successors, (255), 49 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:41,708 INFO L93 Difference]: Finished difference Result 3792 states and 4160 transitions. [2022-07-21 17:04:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 17:04:41,708 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.204081632653061) internal successors, (255), 49 states have internal predecessors, (255), 0 states have call successors, (0), 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 133 [2022-07-21 17:04:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:41,710 INFO L225 Difference]: With dead ends: 3792 [2022-07-21 17:04:41,711 INFO L226 Difference]: Without dead ends: 3670 [2022-07-21 17:04:41,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1049, Invalid=4501, Unknown=0, NotChecked=0, Total=5550 [2022-07-21 17:04:41,711 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 248 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:41,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 809 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:04:41,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2022-07-21 17:04:41,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2901. [2022-07-21 17:04:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2899 states have (on average 1.1110727837185237) internal successors, (3221), 2900 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 3221 transitions. [2022-07-21 17:04:41,729 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 3221 transitions. Word has length 133 [2022-07-21 17:04:41,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:41,729 INFO L495 AbstractCegarLoop]: Abstraction has 2901 states and 3221 transitions. [2022-07-21 17:04:41,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.204081632653061) internal successors, (255), 49 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:41,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 3221 transitions. [2022-07-21 17:04:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-21 17:04:41,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:41,731 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:41,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:41,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-07-21 17:04:41,959 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:41,959 INFO L85 PathProgramCache]: Analyzing trace with hash -606633852, now seen corresponding path program 16 times [2022-07-21 17:04:41,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:41,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998716808] [2022-07-21 17:04:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:41,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 66 proven. 370 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:42,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:42,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998716808] [2022-07-21 17:04:42,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998716808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:42,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387816928] [2022-07-21 17:04:42,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:04:42,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:42,138 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:42,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-21 17:04:42,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:04:42,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:04:42,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-21 17:04:42,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:04:42,416 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:04:42,417 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 17:04:42,422 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 10 treesize of output 8 [2022-07-21 17:04:42,731 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 16 treesize of output 12 [2022-07-21 17:04:42,756 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 19 treesize of output 21 [2022-07-21 17:04:43,392 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:43,392 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 19 treesize of output 19 [2022-07-21 17:04:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 98 proven. 338 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:43,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:04:44,163 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4179 (Array Int Int)) (|v_ULTIMATE.start_substring_~ps~0#1.offset_375| Int)) (or (not (<= 0 |v_ULTIMATE.start_substring_~ps~0#1.offset_375|)) (<= (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_375| 9) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4179) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |v_ULTIMATE.start_substring_~ps~0#1.offset_375|)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps~0#1.offset_375|))) is different from false [2022-07-21 17:04:44,168 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:44,168 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 23 treesize of output 24 [2022-07-21 17:04:44,171 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:04:44,172 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 37 treesize of output 37 [2022-07-21 17:04:44,174 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 [2022-07-21 17:04:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 120 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:04:45,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387816928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:04:45,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:04:45,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 66 [2022-07-21 17:04:45,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817917091] [2022-07-21 17:04:45,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:04:45,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-21 17:04:45,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:04:45,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-21 17:04:45,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=3827, Unknown=1, NotChecked=128, Total=4422 [2022-07-21 17:04:45,080 INFO L87 Difference]: Start difference. First operand 2901 states and 3221 transitions. Second operand has 67 states, 66 states have (on average 6.0606060606060606) internal successors, (400), 67 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:46,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:04:46,695 INFO L93 Difference]: Finished difference Result 3800 states and 4200 transitions. [2022-07-21 17:04:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 17:04:46,696 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 6.0606060606060606) internal successors, (400), 67 states have internal predecessors, (400), 0 states have call successors, (0), 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 136 [2022-07-21 17:04:46,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:04:46,699 INFO L225 Difference]: With dead ends: 3800 [2022-07-21 17:04:46,699 INFO L226 Difference]: Without dead ends: 3800 [2022-07-21 17:04:46,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1533, Invalid=6842, Unknown=1, NotChecked=180, Total=8556 [2022-07-21 17:04:46,700 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 2937 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2937 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 2899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:04:46,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2937 Valid, 1452 Invalid, 2899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 2452 Invalid, 0 Unknown, 207 Unchecked, 0.8s Time] [2022-07-21 17:04:46,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3800 states. [2022-07-21 17:04:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3800 to 3485. [2022-07-21 17:04:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3485 states, 3483 states have (on average 1.1108240022968705) internal successors, (3869), 3484 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 3869 transitions. [2022-07-21 17:04:46,721 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 3869 transitions. Word has length 136 [2022-07-21 17:04:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:04:46,721 INFO L495 AbstractCegarLoop]: Abstraction has 3485 states and 3869 transitions. [2022-07-21 17:04:46,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 6.0606060606060606) internal successors, (400), 67 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:04:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 3869 transitions. [2022-07-21 17:04:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-21 17:04:46,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:04:46,723 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:04:46,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-07-21 17:04:46,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-07-21 17:04:46,942 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 17:04:46,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:04:46,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1565650746, now seen corresponding path program 7 times [2022-07-21 17:04:46,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:04:46,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545793920] [2022-07-21 17:04:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:04:46,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:04:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:04:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 207 proven. 147 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 17:04:47,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:04:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545793920] [2022-07-21 17:04:47,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545793920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:04:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795147941] [2022-07-21 17:04:47,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:04:47,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:04:47,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:04:47,150 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:04:47,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process