./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 15fe42cb945ebd9019cc38134c29264613097f232589ff55d01d33d66b19d85f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:50:40,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:50:40,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:50:40,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:50:40,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:50:40,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:50:40,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:50:40,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:50:40,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:50:40,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:50:40,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:50:40,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:50:40,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:50:40,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:50:40,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:50:40,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:50:40,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:50:40,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:50:40,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:50:40,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:50:40,761 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:50:40,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:50:40,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:50:40,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:50:40,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:50:40,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:50:40,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:50:40,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:50:40,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:50:40,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:50:40,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:50:40,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:50:40,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:50:40,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:50:40,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:50:40,779 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:50:40,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:50:40,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:50:40,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:50:40,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:50:40,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:50:40,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:50:40,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 16:50:40,825 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:50:40,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:50:40,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:50:40,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:50:40,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:50:40,827 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:50:40,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:50:40,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:50:40,828 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:50:40,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:50:40,829 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:50:40,829 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:50:40,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:50:40,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:50:40,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:50:40,830 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:50:40,830 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:50:40,831 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 16:50:40,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:50:40,831 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:50:40,831 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:50:40,831 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:50:40,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:50:40,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:50:40,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:50:40,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:50:40,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:50:40,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:50:40,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 16:50:40,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 16:50:40,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15fe42cb945ebd9019cc38134c29264613097f232589ff55d01d33d66b19d85f [2022-07-21 16:50:41,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:50:41,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:50:41,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:50:41,162 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:50:41,163 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:50:41,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2022-07-21 16:50:41,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af3cf4d79/adcc22c96cf44a819b85745a43039db7/FLAG7ebc2c8a2 [2022-07-21 16:50:41,604 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:50:41,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2022-07-21 16:50:41,613 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af3cf4d79/adcc22c96cf44a819b85745a43039db7/FLAG7ebc2c8a2 [2022-07-21 16:50:41,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af3cf4d79/adcc22c96cf44a819b85745a43039db7 [2022-07-21 16:50:41,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:50:41,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:50:41,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:50:41,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:50:41,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:50:41,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:50:41" (1/1) ... [2022-07-21 16:50:41,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718ef852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:41, skipping insertion in model container [2022-07-21 16:50:41,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:50:41" (1/1) ... [2022-07-21 16:50:41,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:50:41,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:50:42,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:50:42,019 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:50:42,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:50:42,089 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:50:42,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42 WrapperNode [2022-07-21 16:50:42,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:50:42,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:50:42,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:50:42,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:50:42,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42" (1/1) ... [2022-07-21 16:50:42,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42" (1/1) ... [2022-07-21 16:50:42,152 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-07-21 16:50:42,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:50:42,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:50:42,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:50:42,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:50:42,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42" (1/1) ... [2022-07-21 16:50:42,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42" (1/1) ... [2022-07-21 16:50:42,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42" (1/1) ... [2022-07-21 16:50:42,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42" (1/1) ... [2022-07-21 16:50:42,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42" (1/1) ... [2022-07-21 16:50:42,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42" (1/1) ... [2022-07-21 16:50:42,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42" (1/1) ... [2022-07-21 16:50:42,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:50:42,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:50:42,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:50:42,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:50:42,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42" (1/1) ... [2022-07-21 16:50:42,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:50:42,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:42,220 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 16:50:42,229 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 16:50:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 16:50:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 16:50:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 16:50:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:50:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:50:42,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:50:42,319 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:50:42,320 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:50:42,612 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:50:42,617 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:50:42,617 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 16:50:42,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:50:42 BoogieIcfgContainer [2022-07-21 16:50:42,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:50:42,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:50:42,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:50:42,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:50:42,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:50:41" (1/3) ... [2022-07-21 16:50:42,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337841fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:50:42, skipping insertion in model container [2022-07-21 16:50:42,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:50:42" (2/3) ... [2022-07-21 16:50:42,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337841fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:50:42, skipping insertion in model container [2022-07-21 16:50:42,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:50:42" (3/3) ... [2022-07-21 16:50:42,625 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcspn-alloca-1.i [2022-07-21 16:50:42,639 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:50:42,639 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-21 16:50:42,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:50:42,694 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@1ed6fc82, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@481370f9 [2022-07-21 16:50:42,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-21 16:50:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) 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 16:50:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:50:42,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:42,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:42,706 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 16:50:42,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-21 16:50:42,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:42,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710583254] [2022-07-21 16:50:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:42,918 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 16:50:42,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:42,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710583254] [2022-07-21 16:50:42,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710583254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:42,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:42,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:42,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169376449] [2022-07-21 16:50:42,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:42,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:42,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:42,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:42,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:42,954 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) 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) 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 16:50:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:43,017 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-07-21 16:50:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:43,019 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 16:50:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:43,026 INFO L225 Difference]: With dead ends: 100 [2022-07-21 16:50:43,026 INFO L226 Difference]: Without dead ends: 96 [2022-07-21 16:50:43,029 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 16:50:43,032 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:43,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-21 16:50:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2022-07-21 16:50:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 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 16:50:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-21 16:50:43,075 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2022-07-21 16:50:43,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:43,076 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-21 16:50:43,076 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 16:50:43,077 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-21 16:50:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:50:43,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:43,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:43,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 16:50:43,082 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 16:50:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:43,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-21 16:50:43,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:43,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884066266] [2022-07-21 16:50:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:43,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:43,175 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 16:50:43,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:43,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884066266] [2022-07-21 16:50:43,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884066266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:43,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:43,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:50:43,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919931593] [2022-07-21 16:50:43,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:43,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:50:43,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:43,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:50:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:43,181 INFO L87 Difference]: Start difference. First operand 55 states and 63 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 16:50:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:43,232 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-07-21 16:50:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:50:43,233 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 16:50:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:43,234 INFO L225 Difference]: With dead ends: 53 [2022-07-21 16:50:43,235 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 16:50:43,236 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 16:50:43,239 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 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 16:50:43,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 16:50:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-21 16:50:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) 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 16:50:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-21 16:50:43,246 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-07-21 16:50:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:43,246 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-21 16:50:43,246 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 16:50:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-21 16:50:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:50:43,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:43,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:43,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 16:50:43,248 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 16:50:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:43,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-21 16:50:43,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:43,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486719612] [2022-07-21 16:50:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:43,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:43,354 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 16:50:43,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:43,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486719612] [2022-07-21 16:50:43,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486719612] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:43,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:43,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:43,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359622510] [2022-07-21 16:50:43,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:43,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:43,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:43,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:43,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:43,359 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 16:50:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:43,485 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2022-07-21 16:50:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:50:43,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 16:50:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:43,489 INFO L225 Difference]: With dead ends: 97 [2022-07-21 16:50:43,490 INFO L226 Difference]: Without dead ends: 97 [2022-07-21 16:50:43,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:50:43,495 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 146 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:43,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 96 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-21 16:50:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2022-07-21 16:50:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-21 16:50:43,509 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-07-21 16:50:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:43,510 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-21 16:50:43,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 16:50:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-21 16:50:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:50:43,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:43,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:43,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 16:50:43,515 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 16:50:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-21 16:50:43,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:43,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318535393] [2022-07-21 16:50:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:43,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:43,562 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 16:50:43,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:43,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318535393] [2022-07-21 16:50:43,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318535393] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:43,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:43,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:50:43,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994136478] [2022-07-21 16:50:43,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:43,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:43,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:43,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:43,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:43,567 INFO L87 Difference]: Start difference. First operand 55 states and 64 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 16:50:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:43,596 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-21 16:50:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:43,597 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 16:50:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:43,599 INFO L225 Difference]: With dead ends: 54 [2022-07-21 16:50:43,599 INFO L226 Difference]: Without dead ends: 54 [2022-07-21 16:50:43,599 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 16:50:43,604 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 38 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 16:50:43,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-21 16:50:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-21 16:50:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) 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 16:50:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-21 16:50:43,609 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2022-07-21 16:50:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:43,609 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-21 16:50:43,610 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 16:50:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-21 16:50:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:50:43,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:43,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:43,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 16:50:43,611 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 16:50:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:43,611 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-21 16:50:43,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:43,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157045676] [2022-07-21 16:50:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:43,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:43,642 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 16:50:43,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:43,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157045676] [2022-07-21 16:50:43,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157045676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:43,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:43,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:43,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117188003] [2022-07-21 16:50:43,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:43,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:43,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:43,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:43,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:43,644 INFO L87 Difference]: Start difference. First operand 54 states and 63 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 16:50:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:43,671 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-07-21 16:50:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:43,672 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 16:50:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:43,674 INFO L225 Difference]: With dead ends: 98 [2022-07-21 16:50:43,674 INFO L226 Difference]: Without dead ends: 98 [2022-07-21 16:50:43,674 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 16:50:43,676 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:43,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-21 16:50:43,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-07-21 16:50:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-07-21 16:50:43,692 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2022-07-21 16:50:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:43,692 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-07-21 16:50:43,693 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 16:50:43,693 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-07-21 16:50:43,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:50:43,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:43,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:43,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 16:50:43,697 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 16:50:43,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:43,698 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-21 16:50:43,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:43,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001531731] [2022-07-21 16:50:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:43,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:43,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:43,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001531731] [2022-07-21 16:50:43,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001531731] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:43,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:43,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:50:43,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335927941] [2022-07-21 16:50:43,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:43,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:50:43,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:50:43,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:43,746 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:43,766 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-07-21 16:50:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:50:43,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 16:50:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:43,767 INFO L225 Difference]: With dead ends: 63 [2022-07-21 16:50:43,767 INFO L226 Difference]: Without dead ends: 63 [2022-07-21 16:50:43,768 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 16:50:43,770 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:43,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-21 16:50:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-21 16:50:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) 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 16:50:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-21 16:50:43,781 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2022-07-21 16:50:43,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:43,782 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-21 16:50:43,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-21 16:50:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:50:43,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:43,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:43,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 16:50:43,783 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 16:50:43,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:43,784 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-21 16:50:43,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:43,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836959160] [2022-07-21 16:50:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:43,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:43,886 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 16:50:43,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:43,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836959160] [2022-07-21 16:50:43,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836959160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:43,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:43,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:43,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594215563] [2022-07-21 16:50:43,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:43,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:43,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:43,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:43,888 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 16:50:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:43,984 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-07-21 16:50:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:50:43,984 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 16:50:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:43,985 INFO L225 Difference]: With dead ends: 98 [2022-07-21 16:50:43,985 INFO L226 Difference]: Without dead ends: 98 [2022-07-21 16:50:43,985 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 16:50:43,986 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 124 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:43,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 91 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:43,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-21 16:50:43,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-07-21 16:50:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:43,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-07-21 16:50:43,991 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2022-07-21 16:50:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:43,991 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-07-21 16:50:43,991 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 16:50:43,991 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-07-21 16:50:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:50:43,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:43,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:43,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 16:50:43,992 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 16:50:43,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:43,993 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-21 16:50:43,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:43,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834713697] [2022-07-21 16:50:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:43,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,027 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 16:50:44,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834713697] [2022-07-21 16:50:44,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834713697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:44,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:44,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:50:44,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894466578] [2022-07-21 16:50:44,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:44,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:44,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:44,030 INFO L87 Difference]: Start difference. First operand 65 states and 78 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 16:50:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,053 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-07-21 16:50:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:44,053 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 16:50:44,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,054 INFO L225 Difference]: With dead ends: 64 [2022-07-21 16:50:44,054 INFO L226 Difference]: Without dead ends: 64 [2022-07-21 16:50:44,054 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 16:50:44,055 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 89 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 36 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 16:50:44,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-21 16:50:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-21 16:50:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:44,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-07-21 16:50:44,058 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2022-07-21 16:50:44,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:44,058 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-07-21 16:50:44,058 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 16:50:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-07-21 16:50:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 16:50:44,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:44,059 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:44,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 16:50:44,060 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 16:50:44,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-21 16:50:44,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084802406] [2022-07-21 16:50:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,139 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 16:50:44,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:44,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084802406] [2022-07-21 16:50:44,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084802406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:44,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964241043] [2022-07-21 16:50:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:44,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:44,143 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 16:50:44,173 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 16:50:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:44,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 16:50:44,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:44,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:50:44,348 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 16:50:44,355 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 16:50:44,413 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 16:50:44,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:44,581 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 16:50:44,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964241043] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:44,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:44,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-21 16:50:44,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460534328] [2022-07-21 16:50:44,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:44,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:50:44,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:44,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:50:44,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:50:44,593 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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 16:50:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:44,776 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2022-07-21 16:50:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:50:44,776 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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 11 [2022-07-21 16:50:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:44,777 INFO L225 Difference]: With dead ends: 149 [2022-07-21 16:50:44,777 INFO L226 Difference]: Without dead ends: 149 [2022-07-21 16:50:44,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:50:44,778 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 207 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:44,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 281 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-21 16:50:44,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2022-07-21 16:50:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 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 16:50:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-21 16:50:44,781 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2022-07-21 16:50:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:44,781 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-21 16:50:44,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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 16:50:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-21 16:50:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 16:50:44,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:44,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:44,808 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 16:50:44,982 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 16:50:44,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:44,983 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2022-07-21 16:50:44,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:44,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397105957] [2022-07-21 16:50:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:44,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:45,013 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 16:50:45,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:45,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397105957] [2022-07-21 16:50:45,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397105957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:45,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:45,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:50:45,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154105117] [2022-07-21 16:50:45,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:45,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:50:45,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:50:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:50:45,020 INFO L87 Difference]: Start difference. First operand 59 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 16:50:45,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:45,053 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-21 16:50:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:45,054 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 16:50:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:45,055 INFO L225 Difference]: With dead ends: 57 [2022-07-21 16:50:45,055 INFO L226 Difference]: Without dead ends: 57 [2022-07-21 16:50:45,055 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 16:50:45,056 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:45,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-21 16:50:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-21 16:50:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) 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 16:50:45,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-21 16:50:45,062 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2022-07-21 16:50:45,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:45,062 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-21 16:50:45,062 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 16:50:45,062 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-21 16:50:45,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 16:50:45,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:45,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:45,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 16:50:45,065 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:45,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:45,066 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-21 16:50:45,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:45,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133124623] [2022-07-21 16:50:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:45,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:45,117 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 16:50:45,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:45,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133124623] [2022-07-21 16:50:45,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133124623] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:45,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:45,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:50:45,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905702692] [2022-07-21 16:50:45,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:45,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:50:45,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:45,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:50:45,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:50:45,120 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 16:50:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:45,182 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-21 16:50:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:50:45,182 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 16:50:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:45,187 INFO L225 Difference]: With dead ends: 80 [2022-07-21 16:50:45,187 INFO L226 Difference]: Without dead ends: 80 [2022-07-21 16:50:45,188 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 16:50:45,188 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 64 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 16:50:45,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 64 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-21 16:50:45,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2022-07-21 16:50:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.42) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-07-21 16:50:45,191 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2022-07-21 16:50:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:45,192 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-07-21 16:50:45,192 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 16:50:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-07-21 16:50:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:50:45,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:45,193 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:45,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 16:50:45,193 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 16:50:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-21 16:50:45,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:45,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417099477] [2022-07-21 16:50:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:45,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:45,253 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 16:50:45,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:45,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417099477] [2022-07-21 16:50:45,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417099477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:45,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992178401] [2022-07-21 16:50:45,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:45,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:45,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:45,256 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 16:50:45,265 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 16:50:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:45,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 16:50:45,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:45,335 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:50:45,336 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 16:50:45,409 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 16:50:45,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:45,555 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 16:50:45,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992178401] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:45,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:45,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-21 16:50:45,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550313637] [2022-07-21 16:50:45,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:45,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:50:45,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:45,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:50:45,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:50:45,557 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:45,736 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2022-07-21 16:50:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:50:45,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:50:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:45,737 INFO L225 Difference]: With dead ends: 124 [2022-07-21 16:50:45,738 INFO L226 Difference]: Without dead ends: 124 [2022-07-21 16:50:45,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:50:45,739 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 258 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:45,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 232 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-21 16:50:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 57. [2022-07-21 16:50:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) 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 16:50:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-21 16:50:45,742 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2022-07-21 16:50:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:45,742 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-21 16:50:45,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-21 16:50:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:50:45,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:45,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:45,763 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 16:50:45,944 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 16:50:45,944 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:45,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2022-07-21 16:50:45,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:45,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62128383] [2022-07-21 16:50:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:45,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,017 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 16:50:46,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:46,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62128383] [2022-07-21 16:50:46,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62128383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:46,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:46,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:46,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814158040] [2022-07-21 16:50:46,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:46,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:46,020 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 16:50:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,043 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-07-21 16:50:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:50:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16:50:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,045 INFO L225 Difference]: With dead ends: 56 [2022-07-21 16:50:46,045 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 16:50:46,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:46,045 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:46,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 70 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 16:50:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-21 16:50:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3555555555555556) 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 16:50:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-21 16:50:46,048 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2022-07-21 16:50:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,048 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-21 16:50:46,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-21 16:50:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:50:46,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:46,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 16:50:46,049 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2022-07-21 16:50:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591684661] [2022-07-21 16:50:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,108 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 16:50:46,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:46,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591684661] [2022-07-21 16:50:46,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591684661] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:46,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:46,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:50:46,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830019750] [2022-07-21 16:50:46,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:50:46,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:50:46,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:50:46,111 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 16:50:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,146 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-21 16:50:46,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:50:46,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16:50:46,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,147 INFO L225 Difference]: With dead ends: 50 [2022-07-21 16:50:46,147 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 16:50:46,147 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 16:50:46,148 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:46,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 16:50:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-21 16:50:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 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 16:50:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-07-21 16:50:46,150 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2022-07-21 16:50:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,150 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-07-21 16:50:46,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-07-21 16:50:46,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:50:46,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:46,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 16:50:46,155 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:46,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2022-07-21 16:50:46,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380626633] [2022-07-21 16:50:46,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,235 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 16:50:46,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:46,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380626633] [2022-07-21 16:50:46,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380626633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:46,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:46,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 16:50:46,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348895085] [2022-07-21 16:50:46,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:50:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:50:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:50:46,237 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 16:50:46,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,306 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-07-21 16:50:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:50:46,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 16:50:46,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,307 INFO L225 Difference]: With dead ends: 62 [2022-07-21 16:50:46,307 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 16:50:46,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:50:46,309 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:46,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 65 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:46,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 16:50:46,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-07-21 16:50:46,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) 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 16:50:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-21 16:50:46,312 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2022-07-21 16:50:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,313 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-21 16:50:46,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 16:50:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-21 16:50:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 16:50:46,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,314 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 16:50:46,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 16:50:46,314 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,315 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2022-07-21 16:50:46,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326074157] [2022-07-21 16:50:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,348 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 16:50:46,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:46,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326074157] [2022-07-21 16:50:46,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326074157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:46,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:46,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:50:46,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021380706] [2022-07-21 16:50:46,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:50:46,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:50:46,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:50:46,351 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 16:50:46,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,356 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-07-21 16:50:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:50:46,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 16:50:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,357 INFO L225 Difference]: With dead ends: 59 [2022-07-21 16:50:46,357 INFO L226 Difference]: Without dead ends: 59 [2022-07-21 16:50:46,358 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 16:50:46,358 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 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 16:50:46,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-21 16:50:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-21 16:50:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 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 16:50:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-21 16:50:46,361 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2022-07-21 16:50:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,362 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-21 16:50:46,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 16:50:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-21 16:50:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 16:50:46,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:46,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 16:50:46,364 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:46,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2022-07-21 16:50:46,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259474376] [2022-07-21 16:50:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:46,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:46,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259474376] [2022-07-21 16:50:46,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259474376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:46,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:46,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 16:50:46,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929983323] [2022-07-21 16:50:46,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:50:46,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:50:46,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:50:46,472 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,537 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-07-21 16:50:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:50:46,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-21 16:50:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,538 INFO L225 Difference]: With dead ends: 71 [2022-07-21 16:50:46,538 INFO L226 Difference]: Without dead ends: 54 [2022-07-21 16:50:46,538 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 16:50:46,538 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 185 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 16:50:46,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 185 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-21 16:50:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-21 16:50:46,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 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 16:50:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-21 16:50:46,540 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2022-07-21 16:50:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,541 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-21 16:50:46,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-21 16:50:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 16:50:46,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:46,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 16:50:46,542 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:46,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2022-07-21 16:50:46,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609752271] [2022-07-21 16:50:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:46,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:46,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609752271] [2022-07-21 16:50:46,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609752271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:46,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:46,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 16:50:46,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241931034] [2022-07-21 16:50:46,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:50:46,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:50:46,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:50:46,638 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,704 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-07-21 16:50:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 16:50:46,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-21 16:50:46,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,705 INFO L225 Difference]: With dead ends: 74 [2022-07-21 16:50:46,705 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 16:50:46,705 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 16:50:46,706 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:46,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 165 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 16:50:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-07-21 16:50:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-07-21 16:50:46,708 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2022-07-21 16:50:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,708 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-07-21 16:50:46,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-07-21 16:50:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 16:50:46,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:46,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 16:50:46,710 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2022-07-21 16:50:46,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317227103] [2022-07-21 16:50:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:46,807 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 16:50:46,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:46,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317227103] [2022-07-21 16:50:46,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317227103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:46,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:46,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 16:50:46,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30848555] [2022-07-21 16:50:46,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:46,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:50:46,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:46,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:50:46,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:50:46,809 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:46,907 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-07-21 16:50:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 16:50:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-07-21 16:50:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:46,908 INFO L225 Difference]: With dead ends: 75 [2022-07-21 16:50:46,908 INFO L226 Difference]: Without dead ends: 75 [2022-07-21 16:50:46,908 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 16:50:46,909 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:46,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 187 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:50:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-21 16:50:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-07-21 16:50:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-21 16:50:46,911 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2022-07-21 16:50:46,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:46,912 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-21 16:50:46,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:46,912 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-21 16:50:46,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 16:50:46,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:46,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:46,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 16:50:46,915 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:46,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:46,915 INFO L85 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2022-07-21 16:50:46,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:46,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078436061] [2022-07-21 16:50:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:46,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:47,041 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 16:50:47,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:47,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078436061] [2022-07-21 16:50:47,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078436061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:50:47,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:50:47,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 16:50:47,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544898752] [2022-07-21 16:50:47,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:50:47,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 16:50:47,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 16:50:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:50:47,044 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:47,252 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2022-07-21 16:50:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:50:47,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-07-21 16:50:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:47,254 INFO L225 Difference]: With dead ends: 96 [2022-07-21 16:50:47,254 INFO L226 Difference]: Without dead ends: 96 [2022-07-21 16:50:47,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:50:47,255 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:47,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 197 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-21 16:50:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2022-07-21 16:50:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-07-21 16:50:47,262 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2022-07-21 16:50:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:47,262 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-07-21 16:50:47,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-07-21 16:50:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 16:50:47,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:47,262 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] [2022-07-21 16:50:47,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 16:50:47,263 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:47,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2022-07-21 16:50:47,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:47,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775375817] [2022-07-21 16:50:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:47,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:47,360 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 16:50:47,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:47,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775375817] [2022-07-21 16:50:47,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775375817] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:47,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048104647] [2022-07-21 16:50:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:47,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:47,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:47,362 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 16:50:47,389 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 16:50:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:47,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 16:50:47,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:47,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:50:47,450 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 16:50:47,454 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 16:50:47,578 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 16:50:47,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:47,723 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 16:50:47,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048104647] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:47,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:47,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2022-07-21 16:50:47,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417757794] [2022-07-21 16:50:47,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:47,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 16:50:47,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 16:50:47,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-21 16:50:47,725 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:47,921 INFO L93 Difference]: Finished difference Result 145 states and 163 transitions. [2022-07-21 16:50:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 16:50:47,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-21 16:50:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:47,922 INFO L225 Difference]: With dead ends: 145 [2022-07-21 16:50:47,922 INFO L226 Difference]: Without dead ends: 145 [2022-07-21 16:50:47,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 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 16:50:47,923 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 301 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:47,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 135 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-21 16:50:47,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 102. [2022-07-21 16:50:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 98 states have (on average 1.2142857142857142) internal successors, (119), 101 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-07-21 16:50:47,925 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 27 [2022-07-21 16:50:47,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:47,925 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-07-21 16:50:47,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-07-21 16:50:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 16:50:47,925 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:47,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:47,953 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 16:50:48,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:48,126 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:48,127 INFO L85 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2022-07-21 16:50:48,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:48,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056651783] [2022-07-21 16:50:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:48,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:48,237 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 16:50:48,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:48,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056651783] [2022-07-21 16:50:48,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056651783] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:48,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420374789] [2022-07-21 16:50:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:48,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:48,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:48,239 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 16:50:48,268 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 16:50:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:48,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 16:50:48,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:48,414 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 16:50:48,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:48,534 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 16:50:48,553 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 16:50:48,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420374789] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:48,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:48,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-07-21 16:50:48,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996992368] [2022-07-21 16:50:48,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:48,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 16:50:48,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 16:50:48,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-21 16:50:48,556 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:48,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:48,810 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2022-07-21 16:50:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:50:48,812 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-21 16:50:48,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:48,812 INFO L225 Difference]: With dead ends: 136 [2022-07-21 16:50:48,812 INFO L226 Difference]: Without dead ends: 136 [2022-07-21 16:50:48,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-07-21 16:50:48,813 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 409 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:48,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 250 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:50:48,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-21 16:50:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2022-07-21 16:50:48,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 97 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2022-07-21 16:50:48,815 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 30 [2022-07-21 16:50:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:48,815 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2022-07-21 16:50:48,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2022-07-21 16:50:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 16:50:48,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:48,816 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] [2022-07-21 16:50:48,837 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 16:50:49,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:49,027 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:49,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:49,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2022-07-21 16:50:49,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:49,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044041918] [2022-07-21 16:50:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:49,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:49,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:49,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044041918] [2022-07-21 16:50:49,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044041918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:49,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864668821] [2022-07-21 16:50:49,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:50:49,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:49,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:49,188 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 16:50:49,192 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 16:50:49,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:50:49,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:49,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 16:50:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:49,333 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 16:50:49,481 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 16:50:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:49,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:49,555 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 16:50:49,557 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 16:50:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:49,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864668821] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:49,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:49,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-07-21 16:50:49,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082516191] [2022-07-21 16:50:49,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:49,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 16:50:49,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 16:50:49,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-07-21 16:50:49,646 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:50,106 INFO L93 Difference]: Finished difference Result 184 states and 207 transitions. [2022-07-21 16:50:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:50:50,107 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-21 16:50:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:50,109 INFO L225 Difference]: With dead ends: 184 [2022-07-21 16:50:50,109 INFO L226 Difference]: Without dead ends: 184 [2022-07-21 16:50:50,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 16:50:50,110 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 328 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:50,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 390 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 261 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-07-21 16:50:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-21 16:50:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 138. [2022-07-21 16:50:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 137 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 159 transitions. [2022-07-21 16:50:50,114 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 159 transitions. Word has length 36 [2022-07-21 16:50:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:50,114 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 159 transitions. [2022-07-21 16:50:50,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 159 transitions. [2022-07-21 16:50:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 16:50:50,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:50,115 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] [2022-07-21 16:50:50,139 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 16:50:50,315 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,SelfDestructingSolverStorable22 [2022-07-21 16:50:50,315 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1892678105, now seen corresponding path program 2 times [2022-07-21 16:50:50,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:50,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117685582] [2022-07-21 16:50:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:50,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:50,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:50,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117685582] [2022-07-21 16:50:50,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117685582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:50,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036986422] [2022-07-21 16:50:50,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:50:50,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:50,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:50,488 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 16:50:50,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 16:50:50,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:50:50,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 16:50:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:50,578 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 16:50:50,661 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 11 treesize of output 7 [2022-07-21 16:50:50,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:50:50,724 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 16:50:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:50,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:50,775 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_279 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_279) |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 16:50:50,795 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:50:50,796 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 16:50:50,801 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:50:50,801 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 16:50:50,804 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 16:50:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:50,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036986422] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:50,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:50,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 22 [2022-07-21 16:50:50,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072957187] [2022-07-21 16:50:50,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:50,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 16:50:50,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:50,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 16:50:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=353, Unknown=1, NotChecked=38, Total=462 [2022-07-21 16:50:50,921 INFO L87 Difference]: Start difference. First operand 138 states and 159 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 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 16:50:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:51,125 INFO L93 Difference]: Finished difference Result 228 states and 257 transitions. [2022-07-21 16:50:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:50:51,125 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 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) Word has length 38 [2022-07-21 16:50:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:51,126 INFO L225 Difference]: With dead ends: 228 [2022-07-21 16:50:51,126 INFO L226 Difference]: Without dead ends: 183 [2022-07-21 16:50:51,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=540, Unknown=1, NotChecked=48, Total=702 [2022-07-21 16:50:51,127 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:51,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 221 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 159 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-07-21 16:50:51,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-21 16:50:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 176. [2022-07-21 16:50:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 174 states have (on average 1.1494252873563218) internal successors, (200), 175 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 200 transitions. [2022-07-21 16:50:51,141 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 200 transitions. Word has length 38 [2022-07-21 16:50:51,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:51,142 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 200 transitions. [2022-07-21 16:50:51,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 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 16:50:51,142 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 200 transitions. [2022-07-21 16:50:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 16:50:51,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:51,143 INFO L195 NwaCegarLoop]: trace histogram [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 16:50:51,171 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 16:50:51,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:51,356 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash -304963965, now seen corresponding path program 3 times [2022-07-21 16:50:51,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:51,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132925277] [2022-07-21 16:50:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:51,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:51,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:51,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132925277] [2022-07-21 16:50:51,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132925277] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:51,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103551458] [2022-07-21 16:50:51,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:50:51,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:51,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:51,472 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 16:50:51,473 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 16:50:51,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:50:51,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 16:50:51,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:51,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:51,849 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 16:50:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:51,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103551458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:51,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:51,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-07-21 16:50:51,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720241644] [2022-07-21 16:50:51,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:51,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 16:50:51,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:51,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 16:50:51,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-07-21 16:50:51,875 INFO L87 Difference]: Start difference. First operand 176 states and 200 transitions. Second operand has 25 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 25 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 16:50:52,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:52,352 INFO L93 Difference]: Finished difference Result 274 states and 309 transitions. [2022-07-21 16:50:52,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 16:50:52,352 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 25 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 40 [2022-07-21 16:50:52,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:52,353 INFO L225 Difference]: With dead ends: 274 [2022-07-21 16:50:52,353 INFO L226 Difference]: Without dead ends: 274 [2022-07-21 16:50:52,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 16:50:52,354 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 526 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:52,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 371 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:50:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-07-21 16:50:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 220. [2022-07-21 16:50:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 218 states have (on average 1.165137614678899) internal successors, (254), 219 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 254 transitions. [2022-07-21 16:50:52,360 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 254 transitions. Word has length 40 [2022-07-21 16:50:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:52,360 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 254 transitions. [2022-07-21 16:50:52,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 25 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 16:50:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 254 transitions. [2022-07-21 16:50:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 16:50:52,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:52,360 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] [2022-07-21 16:50:52,387 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 16:50:52,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:52,561 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:52,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:52,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2034497590, now seen corresponding path program 3 times [2022-07-21 16:50:52,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:52,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054629570] [2022-07-21 16:50:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:52,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:52,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:52,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054629570] [2022-07-21 16:50:52,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054629570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:52,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731344971] [2022-07-21 16:50:52,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:50:52,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:52,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:52,654 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 16:50:52,655 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 16:50:52,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:50:52,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 16:50:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:52,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:53,036 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 16:50:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:53,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731344971] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:53,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:53,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-07-21 16:50:53,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910351048] [2022-07-21 16:50:53,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:53,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 16:50:53,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:53,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 16:50:53,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:50:53,060 INFO L87 Difference]: Start difference. First operand 220 states and 254 transitions. Second operand has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:53,305 INFO L93 Difference]: Finished difference Result 370 states and 428 transitions. [2022-07-21 16:50:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:50:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-21 16:50:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:53,307 INFO L225 Difference]: With dead ends: 370 [2022-07-21 16:50:53,307 INFO L226 Difference]: Without dead ends: 370 [2022-07-21 16:50:53,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2022-07-21 16:50:53,308 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 454 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:53,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 340 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:53,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-07-21 16:50:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 295. [2022-07-21 16:50:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 293 states have (on average 1.1706484641638226) internal successors, (343), 294 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:53,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 343 transitions. [2022-07-21 16:50:53,313 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 343 transitions. Word has length 42 [2022-07-21 16:50:53,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:53,313 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 343 transitions. [2022-07-21 16:50:53,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 343 transitions. [2022-07-21 16:50:53,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 16:50:53,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:53,314 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-21 16:50:53,336 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 16:50:53,514 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,SelfDestructingSolverStorable25 [2022-07-21 16:50:53,515 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:53,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:53,515 INFO L85 PathProgramCache]: Analyzing trace with hash 371510231, now seen corresponding path program 4 times [2022-07-21 16:50:53,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:53,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927213151] [2022-07-21 16:50:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:53,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:53,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:53,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927213151] [2022-07-21 16:50:53,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927213151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:53,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146928331] [2022-07-21 16:50:53,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:50:53,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:53,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:53,974 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 16:50:53,975 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 16:50:54,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:50:54,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 16:50:54,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:54,076 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:50:54,076 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 16:50:54,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 16:50:54,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:50:54,581 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 16:50:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:54,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:54,920 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 16:50:54,922 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 16:50:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:55,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146928331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:55,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:55,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 41 [2022-07-21 16:50:55,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908386046] [2022-07-21 16:50:55,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:55,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 16:50:55,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 16:50:55,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 16:50:55,258 INFO L87 Difference]: Start difference. First operand 295 states and 343 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:56,457 INFO L93 Difference]: Finished difference Result 366 states and 419 transitions. [2022-07-21 16:50:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 16:50:56,458 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 0 states have call successors, (0), 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 16:50:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:56,459 INFO L225 Difference]: With dead ends: 366 [2022-07-21 16:50:56,459 INFO L226 Difference]: Without dead ends: 344 [2022-07-21 16:50:56,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=443, Invalid=3717, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 16:50:56,461 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 136 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:56,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 625 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 426 Invalid, 0 Unknown, 327 Unchecked, 0.2s Time] [2022-07-21 16:50:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-07-21 16:50:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 325. [2022-07-21 16:50:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.1702786377708978) internal successors, (378), 324 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 378 transitions. [2022-07-21 16:50:56,468 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 378 transitions. Word has length 46 [2022-07-21 16:50:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:56,468 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 378 transitions. [2022-07-21 16:50:56,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 378 transitions. [2022-07-21 16:50:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 16:50:56,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:56,469 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-21 16:50:56,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:50:56,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 16:50:56,693 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:56,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:56,694 INFO L85 PathProgramCache]: Analyzing trace with hash -129625868, now seen corresponding path program 5 times [2022-07-21 16:50:56,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:56,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636843905] [2022-07-21 16:50:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:56,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:56,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636843905] [2022-07-21 16:50:56,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636843905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713806829] [2022-07-21 16:50:56,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:50:56,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:56,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:56,852 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 16:50:56,862 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 16:50:56,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 16:50:56,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:56,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 16:50:56,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:56,968 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:50:56,968 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 16:50:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:57,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:50:57,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713806829] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:57,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:57,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-21 16:50:57,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615423829] [2022-07-21 16:50:57,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:57,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 16:50:57,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 16:50:57,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-07-21 16:50:57,482 INFO L87 Difference]: Start difference. First operand 325 states and 378 transitions. Second operand has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:58,061 INFO L93 Difference]: Finished difference Result 505 states and 580 transitions. [2022-07-21 16:50:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 16:50:58,061 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 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 50 [2022-07-21 16:50:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:58,063 INFO L225 Difference]: With dead ends: 505 [2022-07-21 16:50:58,063 INFO L226 Difference]: Without dead ends: 505 [2022-07-21 16:50:58,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 16:50:58,064 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 512 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:58,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 587 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:50:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-07-21 16:50:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 408. [2022-07-21 16:50:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 406 states have (on average 1.187192118226601) internal successors, (482), 407 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 482 transitions. [2022-07-21 16:50:58,072 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 482 transitions. Word has length 50 [2022-07-21 16:50:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:58,072 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 482 transitions. [2022-07-21 16:50:58,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 482 transitions. [2022-07-21 16:50:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 16:50:58,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:58,074 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:50:58,096 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 16:50:58,287 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,SelfDestructingSolverStorable27 [2022-07-21 16:50:58,287 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:58,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1685089117, now seen corresponding path program 1 times [2022-07-21 16:50:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:58,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696297699] [2022-07-21 16:50:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:58,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 16:50:58,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:58,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696297699] [2022-07-21 16:50:58,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696297699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:58,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145313318] [2022-07-21 16:50:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:58,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:58,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:58,369 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 16:50:58,372 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 16:50:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 16:50:58,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:58,469 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 6 treesize of output 5 [2022-07-21 16:50:58,589 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 16:50:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 16:50:58,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:50:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 16:50:58,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145313318] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:50:58,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:50:58,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 20 [2022-07-21 16:50:58,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491480389] [2022-07-21 16:50:58,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:50:58,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 16:50:58,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:50:58,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 16:50:58,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:50:58,661 INFO L87 Difference]: Start difference. First operand 408 states and 482 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:58,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:50:58,913 INFO L93 Difference]: Finished difference Result 528 states and 606 transitions. [2022-07-21 16:50:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:50:58,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-21 16:50:58,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:50:58,915 INFO L225 Difference]: With dead ends: 528 [2022-07-21 16:50:58,915 INFO L226 Difference]: Without dead ends: 528 [2022-07-21 16:50:58,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2022-07-21 16:50:58,916 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 141 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:50:58,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 242 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:50:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-07-21 16:50:58,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 408. [2022-07-21 16:50:58,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 406 states have (on average 1.187192118226601) internal successors, (482), 407 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 482 transitions. [2022-07-21 16:50:58,925 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 482 transitions. Word has length 51 [2022-07-21 16:50:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:50:58,925 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 482 transitions. [2022-07-21 16:50:58,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:50:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 482 transitions. [2022-07-21 16:50:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 16:50:58,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:50:58,927 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] [2022-07-21 16:50:58,950 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 16:50:59,139 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,SelfDestructingSolverStorable28 [2022-07-21 16:50:59,139 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:50:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:50:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1388988596, now seen corresponding path program 4 times [2022-07-21 16:50:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:50:59,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659677579] [2022-07-21 16:50:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:50:59,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:50:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:50:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:50:59,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:50:59,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659677579] [2022-07-21 16:50:59,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659677579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:50:59,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537029599] [2022-07-21 16:50:59,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:50:59,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:50:59,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:50:59,484 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 16:50:59,486 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 16:50:59,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:50:59,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:50:59,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 16:50:59,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:50:59,583 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:50:59,583 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 16:50:59,595 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 16:50:59,759 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 16:50:59,797 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 16:51:00,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:00,108 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 16:51:00,114 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 16:51:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:00,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:00,474 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:00,475 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 16:51:00,481 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:00,481 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 16:51:00,485 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 16:51:00,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:00,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537029599] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:00,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:00,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 37 [2022-07-21 16:51:00,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666037608] [2022-07-21 16:51:00,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:00,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 16:51:00,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:00,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 16:51:00,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1196, Unknown=17, NotChecked=0, Total=1332 [2022-07-21 16:51:00,883 INFO L87 Difference]: Start difference. First operand 408 states and 482 transitions. Second operand has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 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 16:51:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:01,638 INFO L93 Difference]: Finished difference Result 495 states and 577 transitions. [2022-07-21 16:51:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 16:51:01,639 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 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 53 [2022-07-21 16:51:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:01,640 INFO L225 Difference]: With dead ends: 495 [2022-07-21 16:51:01,640 INFO L226 Difference]: Without dead ends: 466 [2022-07-21 16:51:01,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=295, Invalid=2658, Unknown=17, NotChecked=0, Total=2970 [2022-07-21 16:51:01,642 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 102 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:01,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 648 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 270 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2022-07-21 16:51:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-07-21 16:51:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 460. [2022-07-21 16:51:01,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 458 states have (on average 1.1746724890829694) internal successors, (538), 459 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 538 transitions. [2022-07-21 16:51:01,650 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 538 transitions. Word has length 53 [2022-07-21 16:51:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:01,650 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 538 transitions. [2022-07-21 16:51:01,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 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 16:51:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 538 transitions. [2022-07-21 16:51:01,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 16:51:01,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:01,651 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-21 16:51:01,677 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 16:51:01,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:01,874 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:01,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:01,875 INFO L85 PathProgramCache]: Analyzing trace with hash 509273480, now seen corresponding path program 6 times [2022-07-21 16:51:01,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:01,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163248560] [2022-07-21 16:51:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:01,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:02,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:02,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163248560] [2022-07-21 16:51:02,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163248560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:02,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239769053] [2022-07-21 16:51:02,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:51:02,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:02,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:02,067 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 16:51:02,067 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 16:51:02,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 16:51:02,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 16:51:02,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:02,257 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 16:51:02,647 INFO L356 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2022-07-21 16:51:02,648 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 28 treesize of output 18 [2022-07-21 16:51:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:02,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:02,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-07-21 16:51:02,880 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 16:51:02,881 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 51 treesize of output 43 [2022-07-21 16:51:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:03,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239769053] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:03,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:03,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 42 [2022-07-21 16:51:03,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683625216] [2022-07-21 16:51:03,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:03,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 16:51:03,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:03,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 16:51:03,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1559, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 16:51:03,043 INFO L87 Difference]: Start difference. First operand 460 states and 538 transitions. Second operand has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 42 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:04,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:04,471 INFO L93 Difference]: Finished difference Result 946 states and 1080 transitions. [2022-07-21 16:51:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 16:51:04,471 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 42 states have internal predecessors, (132), 0 states have call successors, (0), 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 56 [2022-07-21 16:51:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:04,474 INFO L225 Difference]: With dead ends: 946 [2022-07-21 16:51:04,474 INFO L226 Difference]: Without dead ends: 918 [2022-07-21 16:51:04,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=739, Invalid=5423, Unknown=0, NotChecked=0, Total=6162 [2022-07-21 16:51:04,476 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 398 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:04,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 1440 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 987 Invalid, 0 Unknown, 397 Unchecked, 0.4s Time] [2022-07-21 16:51:04,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-07-21 16:51:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 570. [2022-07-21 16:51:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 568 states have (on average 1.1778169014084507) internal successors, (669), 569 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:04,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 669 transitions. [2022-07-21 16:51:04,489 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 669 transitions. Word has length 56 [2022-07-21 16:51:04,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:04,489 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 669 transitions. [2022-07-21 16:51:04,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 42 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 669 transitions. [2022-07-21 16:51:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 16:51:04,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:04,491 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] [2022-07-21 16:51:04,519 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 16:51:04,714 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,SelfDestructingSolverStorable30 [2022-07-21 16:51:04,714 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1575476041, now seen corresponding path program 5 times [2022-07-21 16:51:04,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:04,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093293012] [2022-07-21 16:51:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:04,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:04,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:04,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093293012] [2022-07-21 16:51:04,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093293012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:04,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864830624] [2022-07-21 16:51:04,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:51:04,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:04,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:04,845 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 16:51:04,846 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 16:51:04,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 16:51:04,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:04,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 16:51:04,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:05,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:05,314 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 16:51:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:05,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864830624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:05,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:05,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-07-21 16:51:05,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686394096] [2022-07-21 16:51:05,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:05,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 16:51:05,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:05,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 16:51:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-07-21 16:51:05,337 INFO L87 Difference]: Start difference. First operand 570 states and 669 transitions. Second operand has 24 states, 23 states have (on average 5.391304347826087) internal successors, (124), 24 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 16:51:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:05,671 INFO L93 Difference]: Finished difference Result 1190 states and 1421 transitions. [2022-07-21 16:51:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:51:05,672 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.391304347826087) internal successors, (124), 24 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 57 [2022-07-21 16:51:05,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:05,676 INFO L225 Difference]: With dead ends: 1190 [2022-07-21 16:51:05,676 INFO L226 Difference]: Without dead ends: 1190 [2022-07-21 16:51:05,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 16:51:05,678 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 524 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:05,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 581 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:51:05,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-07-21 16:51:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 718. [2022-07-21 16:51:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 716 states have (on average 1.1857541899441342) internal successors, (849), 717 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 849 transitions. [2022-07-21 16:51:05,701 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 849 transitions. Word has length 57 [2022-07-21 16:51:05,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:05,702 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 849 transitions. [2022-07-21 16:51:05,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.391304347826087) internal successors, (124), 24 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 16:51:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 849 transitions. [2022-07-21 16:51:05,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 16:51:05,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:05,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1] [2022-07-21 16:51:05,729 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 16:51:05,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:05,923 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:05,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1096484145, now seen corresponding path program 2 times [2022-07-21 16:51:05,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:05,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786302310] [2022-07-21 16:51:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:05,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 16:51:06,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:06,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786302310] [2022-07-21 16:51:06,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786302310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:06,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719787483] [2022-07-21 16:51:06,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:06,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:06,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:06,118 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 16:51:06,119 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 16:51:06,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:06,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:06,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 16:51:06,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:06,285 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 16:51:06,607 INFO L356 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2022-07-21 16:51:06,607 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 28 treesize of output 18 [2022-07-21 16:51:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 16:51:06,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:06,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-07-21 16:51:06,836 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-21 16:51:06,836 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 45 treesize of output 39 [2022-07-21 16:51:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 16:51:06,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719787483] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:06,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:06,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-07-21 16:51:06,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383213928] [2022-07-21 16:51:06,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:06,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 16:51:06,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 16:51:06,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:51:06,940 INFO L87 Difference]: Start difference. First operand 718 states and 849 transitions. Second operand has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:07,631 INFO L93 Difference]: Finished difference Result 787 states and 909 transitions. [2022-07-21 16:51:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 16:51:07,639 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-21 16:51:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:07,641 INFO L225 Difference]: With dead ends: 787 [2022-07-21 16:51:07,641 INFO L226 Difference]: Without dead ends: 787 [2022-07-21 16:51:07,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=481, Invalid=2941, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 16:51:07,642 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 92 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:07,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 533 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 338 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-07-21 16:51:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-07-21 16:51:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 654. [2022-07-21 16:51:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 652 states have (on average 1.1794478527607362) internal successors, (769), 653 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 769 transitions. [2022-07-21 16:51:07,653 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 769 transitions. Word has length 57 [2022-07-21 16:51:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:07,653 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 769 transitions. [2022-07-21 16:51:07,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 769 transitions. [2022-07-21 16:51:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 16:51:07,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:07,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:07,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 16:51:07,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:07,872 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash 517217176, now seen corresponding path program 1 times [2022-07-21 16:51:07,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:07,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197492383] [2022-07-21 16:51:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 16:51:07,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:07,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197492383] [2022-07-21 16:51:07,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197492383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:07,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99759191] [2022-07-21 16:51:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:07,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:07,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:07,989 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 16:51:07,991 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 16:51:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 16:51:08,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:08,075 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 16:51:08,210 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 16:51:08,235 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 16:51:08,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:08,489 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:08,490 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 10 [2022-07-21 16:51:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:08,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:08,599 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_601) |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 16:51:08,603 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:08,603 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 16:51:08,607 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:08,607 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 16:51:08,609 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 16:51:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:08,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99759191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:08,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:08,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-07-21 16:51:08,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059180567] [2022-07-21 16:51:08,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:08,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 16:51:08,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:08,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 16:51:08,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=789, Unknown=1, NotChecked=56, Total=930 [2022-07-21 16:51:08,776 INFO L87 Difference]: Start difference. First operand 654 states and 769 transitions. Second operand has 31 states, 31 states have (on average 4.516129032258065) internal successors, (140), 31 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 16:51:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:09,358 INFO L93 Difference]: Finished difference Result 813 states and 929 transitions. [2022-07-21 16:51:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 16:51:09,358 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.516129032258065) internal successors, (140), 31 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 59 [2022-07-21 16:51:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:09,360 INFO L225 Difference]: With dead ends: 813 [2022-07-21 16:51:09,360 INFO L226 Difference]: Without dead ends: 813 [2022-07-21 16:51:09,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=1845, Unknown=1, NotChecked=88, Total=2162 [2022-07-21 16:51:09,361 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 155 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:09,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 588 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 428 Invalid, 0 Unknown, 263 Unchecked, 0.2s Time] [2022-07-21 16:51:09,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-07-21 16:51:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 735. [2022-07-21 16:51:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 733 states have (on average 1.159618008185539) internal successors, (850), 734 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 850 transitions. [2022-07-21 16:51:09,379 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 850 transitions. Word has length 59 [2022-07-21 16:51:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:09,379 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 850 transitions. [2022-07-21 16:51:09,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.516129032258065) internal successors, (140), 31 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 16:51:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 850 transitions. [2022-07-21 16:51:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 16:51:09,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:09,381 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-21 16:51:09,409 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 16:51:09,609 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,SelfDestructingSolverStorable33 [2022-07-21 16:51:09,610 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:09,610 INFO L85 PathProgramCache]: Analyzing trace with hash 223488613, now seen corresponding path program 7 times [2022-07-21 16:51:09,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:09,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529823488] [2022-07-21 16:51:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:09,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:09,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:09,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529823488] [2022-07-21 16:51:09,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529823488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:09,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366492213] [2022-07-21 16:51:09,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:51:09,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:09,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:09,795 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 16:51:09,797 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 16:51:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:09,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 16:51:09,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:09,897 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:51:09,898 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 16:51:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:10,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:10,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366492213] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:10,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:10,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2022-07-21 16:51:10,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776874961] [2022-07-21 16:51:10,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:10,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 16:51:10,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:10,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 16:51:10,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1351, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 16:51:10,538 INFO L87 Difference]: Start difference. First operand 735 states and 850 transitions. Second operand has 40 states, 39 states have (on average 4.3076923076923075) internal successors, (168), 40 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 16:51:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:11,399 INFO L93 Difference]: Finished difference Result 1179 states and 1336 transitions. [2022-07-21 16:51:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 16:51:11,399 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.3076923076923075) internal successors, (168), 40 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 60 [2022-07-21 16:51:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:11,402 INFO L225 Difference]: With dead ends: 1179 [2022-07-21 16:51:11,402 INFO L226 Difference]: Without dead ends: 1179 [2022-07-21 16:51:11,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 16:51:11,403 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 564 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:11,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1045 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 16:51:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-07-21 16:51:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 893. [2022-07-21 16:51:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 891 states have (on average 1.1728395061728396) internal successors, (1045), 892 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1045 transitions. [2022-07-21 16:51:11,418 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1045 transitions. Word has length 60 [2022-07-21 16:51:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:11,418 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1045 transitions. [2022-07-21 16:51:11,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.3076923076923075) internal successors, (168), 40 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 16:51:11,418 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1045 transitions. [2022-07-21 16:51:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 16:51:11,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:11,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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 16:51:11,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-21 16:51:11,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:11,635 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash 276863736, now seen corresponding path program 1 times [2022-07-21 16:51:11,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:11,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770366412] [2022-07-21 16:51:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:11,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:11,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:11,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770366412] [2022-07-21 16:51:11,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770366412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:11,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842140672] [2022-07-21 16:51:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:11,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:11,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:11,966 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 16:51:11,969 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 16:51:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:12,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 16:51:12,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:12,065 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:51:12,065 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 16:51:12,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 16:51:12,288 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:51:12,288 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 16:51:12,307 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 16:51:13,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:13,579 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 22 treesize of output 11 [2022-07-21 16:51:13,585 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:51:13,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 16:51:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:13,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:13,847 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:13,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 16:51:13,854 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:13,854 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 16:51:13,857 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 16:51:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:14,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842140672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:14,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:14,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-07-21 16:51:14,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052994102] [2022-07-21 16:51:14,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:14,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 16:51:14,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 16:51:14,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1822, Unknown=1, NotChecked=0, Total=1980 [2022-07-21 16:51:14,337 INFO L87 Difference]: Start difference. First operand 893 states and 1045 transitions. Second operand has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 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 16:51:15,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:15,619 INFO L93 Difference]: Finished difference Result 1210 states and 1398 transitions. [2022-07-21 16:51:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 16:51:15,619 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 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 63 [2022-07-21 16:51:15,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:15,621 INFO L225 Difference]: With dead ends: 1210 [2022-07-21 16:51:15,621 INFO L226 Difference]: Without dead ends: 1078 [2022-07-21 16:51:15,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=553, Invalid=3606, Unknown=1, NotChecked=0, Total=4160 [2022-07-21 16:51:15,622 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 856 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 482 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:15,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 962 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 781 Invalid, 0 Unknown, 482 Unchecked, 0.3s Time] [2022-07-21 16:51:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2022-07-21 16:51:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 970. [2022-07-21 16:51:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 968 states have (on average 1.1725206611570247) internal successors, (1135), 969 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1135 transitions. [2022-07-21 16:51:15,637 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1135 transitions. Word has length 63 [2022-07-21 16:51:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:15,637 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 1135 transitions. [2022-07-21 16:51:15,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 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 16:51:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1135 transitions. [2022-07-21 16:51:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 16:51:15,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:15,639 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:15,662 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 16:51:15,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:15,862 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash -525028771, now seen corresponding path program 1 times [2022-07-21 16:51:15,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:15,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048261319] [2022-07-21 16:51:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:15,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:51:16,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:16,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048261319] [2022-07-21 16:51:16,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048261319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:16,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763104826] [2022-07-21 16:51:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:16,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:16,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:16,414 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 16:51:16,415 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 16:51:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:16,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 16:51:16,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:16,603 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 16:51:16,797 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 16:51:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:51:16,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:16,892 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 16:51:16,893 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 16:51:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:51:16,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763104826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:16,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:16,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 33 [2022-07-21 16:51:16,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739652801] [2022-07-21 16:51:16,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:16,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 16:51:16,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:16,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 16:51:16,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 16:51:16,993 INFO L87 Difference]: Start difference. First operand 970 states and 1135 transitions. Second operand has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:19,004 INFO L93 Difference]: Finished difference Result 1266 states and 1439 transitions. [2022-07-21 16:51:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 16:51:19,004 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 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 16:51:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:19,007 INFO L225 Difference]: With dead ends: 1266 [2022-07-21 16:51:19,007 INFO L226 Difference]: Without dead ends: 1202 [2022-07-21 16:51:19,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=527, Invalid=4029, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 16:51:19,008 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 407 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:19,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 1632 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1422 Invalid, 0 Unknown, 261 Unchecked, 0.6s Time] [2022-07-21 16:51:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-07-21 16:51:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1000. [2022-07-21 16:51:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 998 states have (on average 1.1733466933867736) internal successors, (1171), 999 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1171 transitions. [2022-07-21 16:51:19,022 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1171 transitions. Word has length 63 [2022-07-21 16:51:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:19,023 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1171 transitions. [2022-07-21 16:51:19,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1171 transitions. [2022-07-21 16:51:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 16:51:19,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:19,024 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-21 16:51:19,048 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 16:51:19,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:19,248 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:19,248 INFO L85 PathProgramCache]: Analyzing trace with hash 265315897, now seen corresponding path program 8 times [2022-07-21 16:51:19,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:19,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538140543] [2022-07-21 16:51:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:19,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:19,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:19,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538140543] [2022-07-21 16:51:19,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538140543] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:19,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076610320] [2022-07-21 16:51:19,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:19,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:19,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:19,449 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 16:51:19,450 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 16:51:19,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:19,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:19,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 16:51:19,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:19,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:19,831 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 16:51:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:19,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:19,914 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 16:51:19,916 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 16:51:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:20,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076610320] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:20,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:20,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 34 [2022-07-21 16:51:20,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800228975] [2022-07-21 16:51:20,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:20,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 16:51:20,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:20,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 16:51:20,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 16:51:20,006 INFO L87 Difference]: Start difference. First operand 1000 states and 1171 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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 16:51:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:20,929 INFO L93 Difference]: Finished difference Result 1591 states and 1803 transitions. [2022-07-21 16:51:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 16:51:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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 66 [2022-07-21 16:51:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:20,933 INFO L225 Difference]: With dead ends: 1591 [2022-07-21 16:51:20,933 INFO L226 Difference]: Without dead ends: 1494 [2022-07-21 16:51:20,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=463, Invalid=2843, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 16:51:20,934 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 750 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:20,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1473 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 16:51:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-07-21 16:51:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1190. [2022-07-21 16:51:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1188 states have (on average 1.1750841750841752) internal successors, (1396), 1189 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1396 transitions. [2022-07-21 16:51:20,949 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1396 transitions. Word has length 66 [2022-07-21 16:51:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:20,949 INFO L495 AbstractCegarLoop]: Abstraction has 1190 states and 1396 transitions. [2022-07-21 16:51:20,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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 16:51:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1396 transitions. [2022-07-21 16:51:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 16:51:20,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:20,950 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] [2022-07-21 16:51:20,975 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 16:51:21,167 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,SelfDestructingSolverStorable37 [2022-07-21 16:51:21,167 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 16:51:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2040073837, now seen corresponding path program 6 times [2022-07-21 16:51:21,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:21,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759592784] [2022-07-21 16:51:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:21,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:21,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:21,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759592784] [2022-07-21 16:51:21,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759592784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:21,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274702826] [2022-07-21 16:51:21,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:51:21,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:21,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:21,358 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 16:51:21,386 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 16:51:21,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 16:51:21,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:21,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 16:51:21,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:21,504 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 16:51:21,510 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 16:51:21,685 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 16:51:21,714 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 16:51:25,869 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 16:51:26,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:26,155 INFO L356 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2022-07-21 16:51:26,155 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 16 [2022-07-21 16:51:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 36 refuted. 22 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:26,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:26,855 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:26,856 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 16:51:26,888 INFO L356 Elim1Store]: treesize reduction 2, result has 94.6 percent of original size [2022-07-21 16:51:26,889 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 101 treesize of output 108 [2022-07-21 16:51:26,900 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:26,900 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 70 treesize of output 68 [2022-07-21 16:51:27,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:27,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 40 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:27,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274702826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:27,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:27,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19] total 48 [2022-07-21 16:51:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969903722] [2022-07-21 16:51:27,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:27,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 16:51:27,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 16:51:27,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2088, Unknown=3, NotChecked=0, Total=2256 [2022-07-21 16:51:27,707 INFO L87 Difference]: Start difference. First operand 1190 states and 1396 transitions. Second operand has 48 states, 48 states have (on average 4.0) internal successors, (192), 48 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:28,393 INFO L93 Difference]: Finished difference Result 1329 states and 1547 transitions. [2022-07-21 16:51:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 16:51:28,394 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.0) internal successors, (192), 48 states have internal predecessors, (192), 0 states have call successors, (0), 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 68 [2022-07-21 16:51:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:28,396 INFO L225 Difference]: With dead ends: 1329 [2022-07-21 16:51:28,396 INFO L226 Difference]: Without dead ends: 1289 [2022-07-21 16:51:28,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=349, Invalid=3808, Unknown=3, NotChecked=0, Total=4160 [2022-07-21 16:51:28,397 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 122 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:28,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1208 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 374 Invalid, 0 Unknown, 341 Unchecked, 0.1s Time] [2022-07-21 16:51:28,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-07-21 16:51:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1270. [2022-07-21 16:51:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1268 states have (on average 1.1687697160883281) internal successors, (1482), 1269 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1482 transitions. [2022-07-21 16:51:28,410 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1482 transitions. Word has length 68 [2022-07-21 16:51:28,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:28,410 INFO L495 AbstractCegarLoop]: Abstraction has 1270 states and 1482 transitions. [2022-07-21 16:51:28,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.0) internal successors, (192), 48 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:28,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1482 transitions. [2022-07-21 16:51:28,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 16:51:28,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:28,412 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-21 16:51:28,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-21 16:51:28,625 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,SelfDestructingSolverStorable38 [2022-07-21 16:51:28,626 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:28,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:28,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1055980246, now seen corresponding path program 9 times [2022-07-21 16:51:28,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:28,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945425677] [2022-07-21 16:51:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:28,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:28,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:28,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945425677] [2022-07-21 16:51:28,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945425677] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:28,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811766746] [2022-07-21 16:51:28,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:51:28,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:28,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:28,859 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 16:51:28,860 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 16:51:29,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 16:51:29,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:29,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 16:51:29,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:29,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:29,548 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 16:51:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:29,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811766746] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:29,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:29,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-07-21 16:51:29,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302608947] [2022-07-21 16:51:29,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:29,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 16:51:29,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:29,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 16:51:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 16:51:29,583 INFO L87 Difference]: Start difference. First operand 1270 states and 1482 transitions. Second operand has 41 states, 40 states have (on average 4.325) internal successors, (173), 41 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 16:51:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:30,353 INFO L93 Difference]: Finished difference Result 1716 states and 1946 transitions. [2022-07-21 16:51:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 16:51:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.325) internal successors, (173), 41 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 70 [2022-07-21 16:51:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:30,357 INFO L225 Difference]: With dead ends: 1716 [2022-07-21 16:51:30,357 INFO L226 Difference]: Without dead ends: 1716 [2022-07-21 16:51:30,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=555, Invalid=2415, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 16:51:30,357 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 751 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:30,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 1066 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 16:51:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-07-21 16:51:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1306. [2022-07-21 16:51:30,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1304 states have (on average 1.1717791411042944) internal successors, (1528), 1305 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1528 transitions. [2022-07-21 16:51:30,374 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1528 transitions. Word has length 70 [2022-07-21 16:51:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:30,374 INFO L495 AbstractCegarLoop]: Abstraction has 1306 states and 1528 transitions. [2022-07-21 16:51:30,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.325) internal successors, (173), 41 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 16:51:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1528 transitions. [2022-07-21 16:51:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 16:51:30,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:30,376 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2022-07-21 16:51:30,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-21 16:51:30,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-21 16:51:30,587 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1326947479, now seen corresponding path program 3 times [2022-07-21 16:51:30,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:30,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659639281] [2022-07-21 16:51:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:30,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:51:30,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659639281] [2022-07-21 16:51:30,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659639281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141328298] [2022-07-21 16:51:30,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:51:30,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:30,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:30,909 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 16:51:30,911 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 16:51:31,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 16:51:31,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:31,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 16:51:31,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:31,080 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 6 treesize of output 5 [2022-07-21 16:51:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 16:51:31,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:31,746 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-21 16:51:31,746 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 16 treesize of output 11 [2022-07-21 16:51:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 16:51:31,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141328298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:31,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:31,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 39 [2022-07-21 16:51:31,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661709398] [2022-07-21 16:51:31,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:31,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 16:51:31,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:31,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 16:51:31,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 16:51:31,792 INFO L87 Difference]: Start difference. First operand 1306 states and 1528 transitions. Second operand has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:33,778 INFO L93 Difference]: Finished difference Result 2346 states and 2628 transitions. [2022-07-21 16:51:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-21 16:51:33,779 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 0 states have call successors, (0), 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 71 [2022-07-21 16:51:33,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:33,783 INFO L225 Difference]: With dead ends: 2346 [2022-07-21 16:51:33,783 INFO L226 Difference]: Without dead ends: 2312 [2022-07-21 16:51:33,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3391 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1175, Invalid=8725, Unknown=0, NotChecked=0, Total=9900 [2022-07-21 16:51:33,784 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 550 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:33,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1147 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1133 Invalid, 0 Unknown, 434 Unchecked, 0.4s Time] [2022-07-21 16:51:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2022-07-21 16:51:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1234. [2022-07-21 16:51:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1232 states have (on average 1.1647727272727273) internal successors, (1435), 1233 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1435 transitions. [2022-07-21 16:51:33,802 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1435 transitions. Word has length 71 [2022-07-21 16:51:33,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:33,803 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1435 transitions. [2022-07-21 16:51:33,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1435 transitions. [2022-07-21 16:51:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 16:51:33,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:33,805 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] [2022-07-21 16:51:33,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-21 16:51:34,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:34,028 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 16:51:34,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:34,029 INFO L85 PathProgramCache]: Analyzing trace with hash 316354352, now seen corresponding path program 7 times [2022-07-21 16:51:34,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:34,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551911302] [2022-07-21 16:51:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:34,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:34,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:34,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551911302] [2022-07-21 16:51:34,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551911302] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:34,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903710610] [2022-07-21 16:51:34,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:51:34,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:34,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:34,184 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 16:51:34,185 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 16:51:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:34,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 16:51:34,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:34,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:34,334 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 16:51:34,338 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 16:51:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:34,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 28 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:35,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903710610] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:35,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:35,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2022-07-21 16:51:35,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101274615] [2022-07-21 16:51:35,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:35,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 16:51:35,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:35,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 16:51:35,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 16:51:35,107 INFO L87 Difference]: Start difference. First operand 1234 states and 1435 transitions. Second operand has 34 states, 33 states have (on average 6.03030303030303) internal successors, (199), 34 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:35,829 INFO L93 Difference]: Finished difference Result 2609 states and 3047 transitions. [2022-07-21 16:51:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:51:35,830 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 6.03030303030303) internal successors, (199), 34 states have internal predecessors, (199), 0 states have call successors, (0), 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 16:51:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:35,835 INFO L225 Difference]: With dead ends: 2609 [2022-07-21 16:51:35,835 INFO L226 Difference]: Without dead ends: 2609 [2022-07-21 16:51:35,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 16:51:35,835 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 829 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:35,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 990 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:51:35,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2022-07-21 16:51:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1441. [2022-07-21 16:51:35,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1439 states have (on average 1.1695621959694231) internal successors, (1683), 1440 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:35,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 1683 transitions. [2022-07-21 16:51:35,853 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 1683 transitions. Word has length 72 [2022-07-21 16:51:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:35,853 INFO L495 AbstractCegarLoop]: Abstraction has 1441 states and 1683 transitions. [2022-07-21 16:51:35,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 6.03030303030303) internal successors, (199), 34 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 1683 transitions. [2022-07-21 16:51:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 16:51:35,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:35,856 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:35,873 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 16:51:36,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:36,059 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2092129770, now seen corresponding path program 10 times [2022-07-21 16:51:36,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:36,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168767503] [2022-07-21 16:51:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:36,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:36,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:36,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168767503] [2022-07-21 16:51:36,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168767503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:36,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773707895] [2022-07-21 16:51:36,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:51:36,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:36,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:36,329 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 16:51:36,330 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 16:51:36,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:51:36,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:36,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 16:51:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:36,448 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:51:36,448 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 16:51:36,708 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 16:51:37,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:51:37,136 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 16:51:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 86 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:37,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:37,557 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 16:51:37,560 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 16:51:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 77 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:38,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773707895] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:38,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:38,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 55 [2022-07-21 16:51:38,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933676166] [2022-07-21 16:51:38,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:38,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-21 16:51:38,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:38,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-21 16:51:38,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2702, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 16:51:38,072 INFO L87 Difference]: Start difference. First operand 1441 states and 1683 transitions. Second operand has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:39,077 INFO L93 Difference]: Finished difference Result 1790 states and 2078 transitions. [2022-07-21 16:51:39,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 16:51:39,078 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 0 states have call successors, (0), 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 16:51:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:39,081 INFO L225 Difference]: With dead ends: 1790 [2022-07-21 16:51:39,081 INFO L226 Difference]: Without dead ends: 1750 [2022-07-21 16:51:39,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=742, Invalid=6230, Unknown=0, NotChecked=0, Total=6972 [2022-07-21 16:51:39,082 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 234 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:39,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1449 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 781 Invalid, 0 Unknown, 237 Unchecked, 0.3s Time] [2022-07-21 16:51:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2022-07-21 16:51:39,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1577. [2022-07-21 16:51:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1575 states have (on average 1.1739682539682539) internal successors, (1849), 1576 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 1849 transitions. [2022-07-21 16:51:39,099 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 1849 transitions. Word has length 76 [2022-07-21 16:51:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:39,099 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 1849 transitions. [2022-07-21 16:51:39,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 1849 transitions. [2022-07-21 16:51:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-21 16:51:39,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:39,102 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1] [2022-07-21 16:51:39,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 16:51:39,325 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,SelfDestructingSolverStorable42 [2022-07-21 16:51:39,325 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:39,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1513885830, now seen corresponding path program 1 times [2022-07-21 16:51:39,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:39,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141442176] [2022-07-21 16:51:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:39,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 53 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 16:51:39,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141442176] [2022-07-21 16:51:39,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141442176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388730346] [2022-07-21 16:51:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:39,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:39,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:39,411 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 16:51:39,412 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 16:51:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:39,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 16:51:39,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:39,543 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 6 treesize of output 5 [2022-07-21 16:51:39,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-21 16:51:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 53 proven. 11 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 16:51:39,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 16:51:39,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388730346] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:39,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:39,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-07-21 16:51:39,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066985126] [2022-07-21 16:51:39,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:39,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 16:51:39,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 16:51:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-21 16:51:39,661 INFO L87 Difference]: Start difference. First operand 1577 states and 1849 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 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 16:51:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:39,833 INFO L93 Difference]: Finished difference Result 1632 states and 1882 transitions. [2022-07-21 16:51:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:51:39,833 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-21 16:51:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:39,836 INFO L225 Difference]: With dead ends: 1632 [2022-07-21 16:51:39,842 INFO L226 Difference]: Without dead ends: 1632 [2022-07-21 16:51:39,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:51:39,843 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 83 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:39,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 304 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:51:39,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2022-07-21 16:51:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1367. [2022-07-21 16:51:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1365 states have (on average 1.1824175824175824) internal successors, (1614), 1366 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1614 transitions. [2022-07-21 16:51:39,857 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1614 transitions. Word has length 78 [2022-07-21 16:51:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:39,857 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 1614 transitions. [2022-07-21 16:51:39,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 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 16:51:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1614 transitions. [2022-07-21 16:51:39,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 16:51:39,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:39,859 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 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] [2022-07-21 16:51:39,885 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 16:51:40,075 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,SelfDestructingSolverStorable43 [2022-07-21 16:51:40,075 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1870203680, now seen corresponding path program 2 times [2022-07-21 16:51:40,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:40,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503524365] [2022-07-21 16:51:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:40,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 91 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:51:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503524365] [2022-07-21 16:51:40,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503524365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520325727] [2022-07-21 16:51:40,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:40,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:40,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:40,350 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 16:51:40,351 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 16:51:40,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:40,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:40,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 16:51:40,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:40,553 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 16:51:40,766 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 16:51:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 86 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 16:51:40,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:40,864 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 16:51:40,868 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 16:51:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 86 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 16:51:40,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520325727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:40,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:40,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 34 [2022-07-21 16:51:40,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268894723] [2022-07-21 16:51:40,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:40,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 16:51:40,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:40,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 16:51:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 16:51:40,971 INFO L87 Difference]: Start difference. First operand 1367 states and 1614 transitions. Second operand has 34 states, 34 states have (on average 4.382352941176471) internal successors, (149), 34 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:42,195 INFO L93 Difference]: Finished difference Result 1898 states and 2148 transitions. [2022-07-21 16:51:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 16:51:42,195 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.382352941176471) internal successors, (149), 34 states have internal predecessors, (149), 0 states have call successors, (0), 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 79 [2022-07-21 16:51:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:42,198 INFO L225 Difference]: With dead ends: 1898 [2022-07-21 16:51:42,198 INFO L226 Difference]: Without dead ends: 1830 [2022-07-21 16:51:42,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=575, Invalid=3331, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 16:51:42,199 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 592 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:42,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1232 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1185 Invalid, 0 Unknown, 66 Unchecked, 0.4s Time] [2022-07-21 16:51:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-07-21 16:51:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1199. [2022-07-21 16:51:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1197 states have (on average 1.177109440267335) internal successors, (1409), 1198 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1409 transitions. [2022-07-21 16:51:42,210 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1409 transitions. Word has length 79 [2022-07-21 16:51:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:42,210 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 1409 transitions. [2022-07-21 16:51:42,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.382352941176471) internal successors, (149), 34 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:42,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1409 transitions. [2022-07-21 16:51:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 16:51:42,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:42,211 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:51:42,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-21 16:51:42,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:42,412 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:42,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash -882077113, now seen corresponding path program 11 times [2022-07-21 16:51:42,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:42,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412378351] [2022-07-21 16:51:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:42,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:42,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:42,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412378351] [2022-07-21 16:51:42,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412378351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:42,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458107279] [2022-07-21 16:51:42,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:51:42,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:42,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:42,688 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 16:51:42,689 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 16:51:42,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 16:51:42,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:42,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 16:51:42,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:42,873 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:51:42,873 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 16:51:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:43,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:43,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458107279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:43,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:43,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2022-07-21 16:51:43,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825040416] [2022-07-21 16:51:43,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:43,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 16:51:43,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:43,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 16:51:43,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 16:51:43,900 INFO L87 Difference]: Start difference. First operand 1199 states and 1409 transitions. Second operand has 48 states, 47 states have (on average 4.723404255319149) internal successors, (222), 48 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 16:51:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:45,209 INFO L93 Difference]: Finished difference Result 2443 states and 2752 transitions. [2022-07-21 16:51:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 16:51:45,209 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.723404255319149) internal successors, (222), 48 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 80 [2022-07-21 16:51:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:45,215 INFO L225 Difference]: With dead ends: 2443 [2022-07-21 16:51:45,215 INFO L226 Difference]: Without dead ends: 2443 [2022-07-21 16:51:45,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=950, Invalid=3742, Unknown=0, NotChecked=0, Total=4692 [2022-07-21 16:51:45,216 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 711 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:45,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 1619 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2192 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 16:51:45,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2022-07-21 16:51:45,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1434. [2022-07-21 16:51:45,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1432 states have (on average 1.1906424581005586) internal successors, (1705), 1433 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1705 transitions. [2022-07-21 16:51:45,236 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1705 transitions. Word has length 80 [2022-07-21 16:51:45,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:45,236 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1705 transitions. [2022-07-21 16:51:45,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.723404255319149) internal successors, (222), 48 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 16:51:45,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1705 transitions. [2022-07-21 16:51:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 16:51:45,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:45,238 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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 16:51:45,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-21 16:51:45,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:45,452 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2132340658, now seen corresponding path program 2 times [2022-07-21 16:51:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:45,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835144216] [2022-07-21 16:51:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:45,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 37 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:45,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:45,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835144216] [2022-07-21 16:51:45,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835144216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:45,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664938120] [2022-07-21 16:51:45,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:45,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:45,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:45,648 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 16:51:45,673 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 16:51:45,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:45,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:45,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 16:51:45,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:45,792 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 16:51:45,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-21 16:51:45,993 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 16:51:46,156 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 16:51:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 37 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:46,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:46,234 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1113 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1113) |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 16:51:46,238 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:46,238 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 16:51:46,242 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:46,243 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 16:51:46,245 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 16:51:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 37 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:46,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664938120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:46,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:46,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 28 [2022-07-21 16:51:46,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426396446] [2022-07-21 16:51:46,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:46,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 16:51:46,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 16:51:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=621, Unknown=1, NotChecked=50, Total=756 [2022-07-21 16:51:46,380 INFO L87 Difference]: Start difference. First operand 1434 states and 1705 transitions. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 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 16:51:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:46,873 INFO L93 Difference]: Finished difference Result 2063 states and 2438 transitions. [2022-07-21 16:51:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:51:46,873 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 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 80 [2022-07-21 16:51:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:46,877 INFO L225 Difference]: With dead ends: 2063 [2022-07-21 16:51:46,877 INFO L226 Difference]: Without dead ends: 1719 [2022-07-21 16:51:46,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1171, Unknown=1, NotChecked=70, Total=1406 [2022-07-21 16:51:46,878 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 136 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:46,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1636 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 836 Invalid, 0 Unknown, 232 Unchecked, 0.3s Time] [2022-07-21 16:51:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-07-21 16:51:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1518. [2022-07-21 16:51:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1516 states have (on average 1.1926121372031662) internal successors, (1808), 1517 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 1808 transitions. [2022-07-21 16:51:46,890 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 1808 transitions. Word has length 80 [2022-07-21 16:51:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:46,891 INFO L495 AbstractCegarLoop]: Abstraction has 1518 states and 1808 transitions. [2022-07-21 16:51:46,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 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 16:51:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 1808 transitions. [2022-07-21 16:51:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 16:51:46,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:46,893 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] [2022-07-21 16:51:46,916 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 16:51:47,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:47,103 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:47,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:47,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1590636166, now seen corresponding path program 8 times [2022-07-21 16:51:47,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:47,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971046824] [2022-07-21 16:51:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:47,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:47,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971046824] [2022-07-21 16:51:47,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971046824] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165889191] [2022-07-21 16:51:47,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:51:47,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:47,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:47,311 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 16:51:47,312 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 16:51:47,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:51:47,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:47,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 16:51:47,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:47,444 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 16:51:47,586 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 16:51:47,609 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 16:51:47,792 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 16:51:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:47,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:47,883 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1151) |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 16:51:47,887 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:47,887 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 16:51:47,891 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:51:47,892 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 37 treesize of output 37 [2022-07-21 16:51:47,894 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 16:51:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:48,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165889191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:48,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:48,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 32 [2022-07-21 16:51:48,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347333740] [2022-07-21 16:51:48,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:48,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 16:51:48,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:48,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 16:51:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=844, Unknown=1, NotChecked=58, Total=992 [2022-07-21 16:51:48,093 INFO L87 Difference]: Start difference. First operand 1518 states and 1808 transitions. Second operand has 32 states, 32 states have (on average 4.9375) internal successors, (158), 32 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:48,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:48,673 INFO L93 Difference]: Finished difference Result 2439 states and 2898 transitions. [2022-07-21 16:51:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 16:51:48,673 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.9375) internal successors, (158), 32 states have internal predecessors, (158), 0 states have call successors, (0), 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 83 [2022-07-21 16:51:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:48,676 INFO L225 Difference]: With dead ends: 2439 [2022-07-21 16:51:48,676 INFO L226 Difference]: Without dead ends: 1940 [2022-07-21 16:51:48,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 148 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1559, Unknown=1, NotChecked=80, Total=1806 [2022-07-21 16:51:48,677 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 218 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:48,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1418 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1044 Invalid, 0 Unknown, 130 Unchecked, 0.4s Time] [2022-07-21 16:51:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-07-21 16:51:48,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1691. [2022-07-21 16:51:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1689 states have (on average 1.1936056838365896) internal successors, (2016), 1690 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2016 transitions. [2022-07-21 16:51:48,703 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2016 transitions. Word has length 83 [2022-07-21 16:51:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:48,703 INFO L495 AbstractCegarLoop]: Abstraction has 1691 states and 2016 transitions. [2022-07-21 16:51:48,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.9375) internal successors, (158), 32 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2016 transitions. [2022-07-21 16:51:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-21 16:51:48,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:48,705 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-21 16:51:48,732 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 16:51:48,924 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,SelfDestructingSolverStorable47 [2022-07-21 16:51:48,924 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:48,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1484661605, now seen corresponding path program 12 times [2022-07-21 16:51:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:48,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246156552] [2022-07-21 16:51:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:48,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:49,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:49,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246156552] [2022-07-21 16:51:49,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246156552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:49,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414583410] [2022-07-21 16:51:49,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:51:49,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:49,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:49,235 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 16:51:49,237 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 16:51:49,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-21 16:51:49,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:49,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 16:51:49,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:49,574 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 16:51:49,750 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 16:51:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:49,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:49,857 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 16:51:49,865 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 16:51:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:50,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414583410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:50,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:50,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 40 [2022-07-21 16:51:50,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264477972] [2022-07-21 16:51:50,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:50,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 16:51:50,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:50,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 16:51:50,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 16:51:50,003 INFO L87 Difference]: Start difference. First operand 1691 states and 2016 transitions. Second operand has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:51,700 INFO L93 Difference]: Finished difference Result 3640 states and 4169 transitions. [2022-07-21 16:51:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 16:51:51,700 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 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 86 [2022-07-21 16:51:51,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:51,704 INFO L225 Difference]: With dead ends: 3640 [2022-07-21 16:51:51,704 INFO L226 Difference]: Without dead ends: 3589 [2022-07-21 16:51:51,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 150 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=565, Invalid=4691, Unknown=0, NotChecked=0, Total=5256 [2022-07-21 16:51:51,704 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 803 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 2748 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 3583 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:51,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 3583 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2748 Invalid, 0 Unknown, 111 Unchecked, 1.0s Time] [2022-07-21 16:51:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2022-07-21 16:51:51,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2089. [2022-07-21 16:51:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2087 states have (on average 1.1998083373263058) internal successors, (2504), 2088 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 2504 transitions. [2022-07-21 16:51:51,734 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 2504 transitions. Word has length 86 [2022-07-21 16:51:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:51,735 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 2504 transitions. [2022-07-21 16:51:51,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 2504 transitions. [2022-07-21 16:51:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 16:51:51,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:51,738 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] [2022-07-21 16:51:51,763 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 16:51:51,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-21 16:51:51,951 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:51,952 INFO L85 PathProgramCache]: Analyzing trace with hash 915408445, now seen corresponding path program 9 times [2022-07-21 16:51:51,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:51,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511417399] [2022-07-21 16:51:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:51,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:52,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511417399] [2022-07-21 16:51:52,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511417399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:52,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088684497] [2022-07-21 16:51:52,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:51:52,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:52,138 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 16:51:52,139 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 16:51:52,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 16:51:52,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:52,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 16:51:52,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:52,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:52,835 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 16:51:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:51:52,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088684497] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:52,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:52,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-07-21 16:51:52,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319890033] [2022-07-21 16:51:52,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:52,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 16:51:52,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:52,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 16:51:52,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 16:51:52,883 INFO L87 Difference]: Start difference. First operand 2089 states and 2504 transitions. Second operand has 37 states, 36 states have (on average 6.361111111111111) internal successors, (229), 37 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:53,397 INFO L93 Difference]: Finished difference Result 3092 states and 3684 transitions. [2022-07-21 16:51:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 16:51:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 6.361111111111111) internal successors, (229), 37 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-21 16:51:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:53,400 INFO L225 Difference]: With dead ends: 3092 [2022-07-21 16:51:53,400 INFO L226 Difference]: Without dead ends: 3092 [2022-07-21 16:51:53,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=489, Invalid=1961, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 16:51:53,401 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 891 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:53,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 933 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:51:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3092 states. [2022-07-21 16:51:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3092 to 2346. [2022-07-21 16:51:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2344 states have (on average 1.2005119453924915) internal successors, (2814), 2345 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 2814 transitions. [2022-07-21 16:51:53,432 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 2814 transitions. Word has length 87 [2022-07-21 16:51:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:53,433 INFO L495 AbstractCegarLoop]: Abstraction has 2346 states and 2814 transitions. [2022-07-21 16:51:53,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 6.361111111111111) internal successors, (229), 37 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 2814 transitions. [2022-07-21 16:51:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-21 16:51:53,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:53,435 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-21 16:51:53,457 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 16:51:53,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-21 16:51:53,655 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash 777978040, now seen corresponding path program 13 times [2022-07-21 16:51:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:53,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155330291] [2022-07-21 16:51:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:53,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:53,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155330291] [2022-07-21 16:51:53,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155330291] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:53,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447923896] [2022-07-21 16:51:53,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:51:53,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:53,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:53,932 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 16:51:53,933 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 16:51:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:54,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-21 16:51:54,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:54,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:51:54,807 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 16:51:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:51:54,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447923896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:51:54,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:51:54,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 42 [2022-07-21 16:51:54,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553105130] [2022-07-21 16:51:54,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:51:54,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 16:51:54,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:51:54,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 16:51:54,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 16:51:54,850 INFO L87 Difference]: Start difference. First operand 2346 states and 2814 transitions. Second operand has 43 states, 42 states have (on average 4.476190476190476) internal successors, (188), 43 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 16:51:56,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:51:56,389 INFO L93 Difference]: Finished difference Result 4323 states and 4961 transitions. [2022-07-21 16:51:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 16:51:56,390 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.476190476190476) internal successors, (188), 43 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 90 [2022-07-21 16:51:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:51:56,394 INFO L225 Difference]: With dead ends: 4323 [2022-07-21 16:51:56,394 INFO L226 Difference]: Without dead ends: 4323 [2022-07-21 16:51:56,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=819, Invalid=3603, Unknown=0, NotChecked=0, Total=4422 [2022-07-21 16:51:56,395 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 1095 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:51:56,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 1709 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2221 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 16:51:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2022-07-21 16:51:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 2776. [2022-07-21 16:51:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2774 states have (on average 1.2108868060562366) internal successors, (3359), 2775 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:51:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 3359 transitions. [2022-07-21 16:51:56,424 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 3359 transitions. Word has length 90 [2022-07-21 16:51:56,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:51:56,424 INFO L495 AbstractCegarLoop]: Abstraction has 2776 states and 3359 transitions. [2022-07-21 16:51:56,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.476190476190476) internal successors, (188), 43 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 16:51:56,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 3359 transitions. [2022-07-21 16:51:56,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 16:51:56,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:51:56,427 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 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 16:51:56,451 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 16:51:56,639 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,SelfDestructingSolverStorable50 [2022-07-21 16:51:56,639 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:51:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:51:56,640 INFO L85 PathProgramCache]: Analyzing trace with hash 422434722, now seen corresponding path program 3 times [2022-07-21 16:51:56,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:51:56,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493237664] [2022-07-21 16:51:56,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:51:56,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:51:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:51:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 16:51:56,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:51:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493237664] [2022-07-21 16:51:56,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493237664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:51:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809514307] [2022-07-21 16:51:56,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:51:56,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:51:56,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:51:56,882 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 16:51:56,883 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 16:51:57,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 16:51:57,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:51:57,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-21 16:51:57,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:51:57,047 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 16:51:57,119 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 16:51:57,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:57,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-07-21 16:51:57,363 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 30 treesize of output 25 [2022-07-21 16:51:57,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:57,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-07-21 16:51:57,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:57,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-07-21 16:51:57,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:57,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-07-21 16:51:57,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:57,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-07-21 16:51:57,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:57,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-07-21 16:51:57,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:51:57,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-07-21 16:51:58,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 40 [2022-07-21 16:51:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 49 proven. 43 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-21 16:51:58,882 INFO L328 TraceCheckSpWp]: Computing backward predicates...