./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0235-1.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 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:39:34,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:39:34,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:39:34,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:39:34,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:39:34,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:39:34,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:39:34,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:39:34,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:39:34,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:39:34,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:39:34,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:39:34,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:39:34,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:39:34,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:39:34,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:39:34,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:39:34,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:39:34,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:39:34,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:39:34,636 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:39:34,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:39:34,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:39:34,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:39:34,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:39:34,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:39:34,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:39:34,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:39:34,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:39:34,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:39:34,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:39:34,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:39:34,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:39:34,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:39:34,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:39:34,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:39:34,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:39:34,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:39:34,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:39:34,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:39:34,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:39:34,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:39:34,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:39:34,687 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:39:34,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:39:34,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:39:34,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:39:34,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:39:34,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:39:34,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:39:34,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:39:34,689 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:39:34,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:39:34,690 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:39:34,691 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:39:34,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:39:34,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:39:34,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:39:34,691 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:39:34,692 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:39:34,692 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:39:34,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:39:34,692 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:39:34,692 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:39:34,692 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:39:34,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:39:34,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:39:34,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:39:34,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:39:34,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:39:34,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:39:34,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:39:34,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:39:34,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a [2022-07-20 05:39:34,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:39:34,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:39:34,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:39:34,934 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:39:34,935 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:39:34,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-1.i [2022-07-20 05:39:34,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d33cd3c17/75787c2e18f84999baa8a7caf317fe55/FLAGe632005d9 [2022-07-20 05:39:35,441 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:39:35,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-1.i [2022-07-20 05:39:35,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d33cd3c17/75787c2e18f84999baa8a7caf317fe55/FLAGe632005d9 [2022-07-20 05:39:35,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d33cd3c17/75787c2e18f84999baa8a7caf317fe55 [2022-07-20 05:39:35,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:39:35,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:39:35,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:39:35,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:39:35,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:39:35,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:39:35" (1/1) ... [2022-07-20 05:39:35,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba785a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:35, skipping insertion in model container [2022-07-20 05:39:35,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:39:35" (1/1) ... [2022-07-20 05:39:35,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:39:35,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:39:36,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:39:36,146 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:39:36,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:39:36,213 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:39:36,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36 WrapperNode [2022-07-20 05:39:36,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:39:36,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:39:36,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:39:36,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:39:36,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36" (1/1) ... [2022-07-20 05:39:36,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36" (1/1) ... [2022-07-20 05:39:36,287 INFO L137 Inliner]: procedures = 188, calls = 69, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 234 [2022-07-20 05:39:36,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:39:36,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:39:36,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:39:36,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:39:36,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36" (1/1) ... [2022-07-20 05:39:36,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36" (1/1) ... [2022-07-20 05:39:36,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36" (1/1) ... [2022-07-20 05:39:36,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36" (1/1) ... [2022-07-20 05:39:36,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36" (1/1) ... [2022-07-20 05:39:36,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36" (1/1) ... [2022-07-20 05:39:36,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36" (1/1) ... [2022-07-20 05:39:36,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:39:36,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:39:36,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:39:36,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:39:36,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36" (1/1) ... [2022-07-20 05:39:36,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:39:36,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:36,381 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) [2022-07-20 05:39:36,383 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 [2022-07-20 05:39:36,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 05:39:36,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 05:39:36,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 05:39:36,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 05:39:36,412 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-07-20 05:39:36,412 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-07-20 05:39:36,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:39:36,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 05:39:36,413 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2022-07-20 05:39:36,414 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2022-07-20 05:39:36,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 05:39:36,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:39:36,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:39:36,559 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:39:36,560 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:39:36,980 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:39:36,994 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:39:36,994 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-20 05:39:36,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:39:36 BoogieIcfgContainer [2022-07-20 05:39:36,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:39:36,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:39:36,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:39:37,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:39:37,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:39:35" (1/3) ... [2022-07-20 05:39:37,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b36317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:39:37, skipping insertion in model container [2022-07-20 05:39:37,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:36" (2/3) ... [2022-07-20 05:39:37,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b36317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:39:37, skipping insertion in model container [2022-07-20 05:39:37,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:39:36" (3/3) ... [2022-07-20 05:39:37,004 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-1.i [2022-07-20 05:39:37,017 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:39:37,017 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 85 error locations. [2022-07-20 05:39:37,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:39:37,076 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@20d30d91, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6738302e [2022-07-20 05:39:37,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 85 error locations. [2022-07-20 05:39:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 134 states have (on average 1.873134328358209) internal successors, (251), 219 states have internal predecessors, (251), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 05:39:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 05:39:37,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:37,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 05:39:37,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:37,102 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-07-20 05:39:37,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:37,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418560406] [2022-07-20 05:39:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:37,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:39:37,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:37,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418560406] [2022-07-20 05:39:37,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418560406] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:39:37,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:39:37,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:39:37,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753660526] [2022-07-20 05:39:37,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:39:37,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 05:39:37,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 05:39:37,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 05:39:37,290 INFO L87 Difference]: Start difference. First operand has 233 states, 134 states have (on average 1.873134328358209) internal successors, (251), 219 states have internal predecessors, (251), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:39:37,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:37,340 INFO L93 Difference]: Finished difference Result 233 states and 262 transitions. [2022-07-20 05:39:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 05:39:37,342 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-07-20 05:39:37,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:37,353 INFO L225 Difference]: With dead ends: 233 [2022-07-20 05:39:37,353 INFO L226 Difference]: Without dead ends: 231 [2022-07-20 05:39:37,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 05:39:37,358 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:37,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:39:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-20 05:39:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-07-20 05:39:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 133 states have (on average 1.7894736842105263) internal successors, (238), 217 states have internal predecessors, (238), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 05:39:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 260 transitions. [2022-07-20 05:39:37,420 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 260 transitions. Word has length 4 [2022-07-20 05:39:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:37,420 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 260 transitions. [2022-07-20 05:39:37,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:39:37,421 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 260 transitions. [2022-07-20 05:39:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 05:39:37,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:37,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 05:39:37,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:39:37,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:37,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:37,423 INFO L85 PathProgramCache]: Analyzing trace with hash 889932981, now seen corresponding path program 1 times [2022-07-20 05:39:37,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:37,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833727464] [2022-07-20 05:39:37,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:37,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:37,455 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:37,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732535594] [2022-07-20 05:39:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:37,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:37,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:37,458 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) [2022-07-20 05:39:37,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 05:39:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:37,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:39:37,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:37,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:39:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:39:37,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:39:37,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:37,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833727464] [2022-07-20 05:39:37,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:37,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732535594] [2022-07-20 05:39:37,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732535594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:39:37,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:39:37,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:39:37,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123141996] [2022-07-20 05:39:37,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:39:37,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:39:37,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:37,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:39:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:39:37,599 INFO L87 Difference]: Start difference. First operand 231 states and 260 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:39:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:37,711 INFO L93 Difference]: Finished difference Result 230 states and 259 transitions. [2022-07-20 05:39:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:39:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-20 05:39:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:37,713 INFO L225 Difference]: With dead ends: 230 [2022-07-20 05:39:37,713 INFO L226 Difference]: Without dead ends: 230 [2022-07-20 05:39:37,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:39:37,715 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 9 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:37,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 418 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:39:37,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-07-20 05:39:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-07-20 05:39:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 133 states have (on average 1.781954887218045) internal successors, (237), 216 states have internal predecessors, (237), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 05:39:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 259 transitions. [2022-07-20 05:39:37,725 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 259 transitions. Word has length 6 [2022-07-20 05:39:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:37,726 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 259 transitions. [2022-07-20 05:39:37,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:39:37,726 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 259 transitions. [2022-07-20 05:39:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:39:37,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:37,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:39:37,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 05:39:37,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:37,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:37,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1818119056, now seen corresponding path program 1 times [2022-07-20 05:39:37,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:37,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649626748] [2022-07-20 05:39:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:37,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:37,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:37,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800349918] [2022-07-20 05:39:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:37,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:37,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:37,957 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) [2022-07-20 05:39:37,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 05:39:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:38,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 05:39:38,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:38,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:39:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:39:38,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:39:38,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649626748] [2022-07-20 05:39:38,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800349918] [2022-07-20 05:39:38,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800349918] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:39:38,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:39:38,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:39:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434724831] [2022-07-20 05:39:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:39:38,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:39:38,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:38,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:39:38,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:39:38,175 INFO L87 Difference]: Start difference. First operand 230 states and 259 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:39:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:38,181 INFO L93 Difference]: Finished difference Result 229 states and 258 transitions. [2022-07-20 05:39:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:39:38,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 05:39:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:38,183 INFO L225 Difference]: With dead ends: 229 [2022-07-20 05:39:38,183 INFO L226 Difference]: Without dead ends: 229 [2022-07-20 05:39:38,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:39:38,184 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 0 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:38,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 443 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2022-07-20 05:39:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-20 05:39:38,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-07-20 05:39:38,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 133 states have (on average 1.7744360902255638) internal successors, (236), 215 states have internal predecessors, (236), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 05:39:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 258 transitions. [2022-07-20 05:39:38,194 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 258 transitions. Word has length 7 [2022-07-20 05:39:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:38,194 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 258 transitions. [2022-07-20 05:39:38,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:39:38,194 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 258 transitions. [2022-07-20 05:39:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:39:38,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:38,196 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-07-20 05:39:38,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 05:39:38,410 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,SelfDestructingSolverStorable2 [2022-07-20 05:39:38,410 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1115615018, now seen corresponding path program 1 times [2022-07-20 05:39:38,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:38,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4239558] [2022-07-20 05:39:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:38,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:38,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:38,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592458074] [2022-07-20 05:39:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:38,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:38,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:38,440 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) [2022-07-20 05:39:38,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 05:39:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:38,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 05:39:38,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:38,754 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:39:38,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:39:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-20 05:39:38,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:39:39,019 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 05:39:39,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-20 05:39:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-20 05:39:39,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:39,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4239558] [2022-07-20 05:39:39,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:39,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592458074] [2022-07-20 05:39:39,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592458074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:39:39,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:39:39,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-20 05:39:39,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405550286] [2022-07-20 05:39:39,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:39:39,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:39:39,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:39:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:39:39,044 INFO L87 Difference]: Start difference. First operand 229 states and 258 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-20 05:39:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:39,562 INFO L93 Difference]: Finished difference Result 364 states and 423 transitions. [2022-07-20 05:39:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:39:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-07-20 05:39:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:39,566 INFO L225 Difference]: With dead ends: 364 [2022-07-20 05:39:39,566 INFO L226 Difference]: Without dead ends: 364 [2022-07-20 05:39:39,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:39:39,567 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 215 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1921 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:39,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1921 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 843 Invalid, 0 Unknown, 301 Unchecked, 0.4s Time] [2022-07-20 05:39:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-20 05:39:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 227. [2022-07-20 05:39:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 133 states have (on average 1.7593984962406015) internal successors, (234), 213 states have internal predecessors, (234), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 05:39:39,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 256 transitions. [2022-07-20 05:39:39,585 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 256 transitions. Word has length 73 [2022-07-20 05:39:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:39,585 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 256 transitions. [2022-07-20 05:39:39,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-20 05:39:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 256 transitions. [2022-07-20 05:39:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:39:39,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:39,587 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-07-20 05:39:39,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 05:39:39,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:39,804 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1115615019, now seen corresponding path program 1 times [2022-07-20 05:39:39,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:39,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499629313] [2022-07-20 05:39:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:39,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:39,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:39,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637569907] [2022-07-20 05:39:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:39,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:39,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:39,848 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) [2022-07-20 05:39:39,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 05:39:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:40,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-20 05:39:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:42,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:39:42,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 05:39:42,622 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:39:42,622 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 [2022-07-20 05:39:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-20 05:39:42,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:39:42,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:42,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499629313] [2022-07-20 05:39:42,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:42,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637569907] [2022-07-20 05:39:42,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637569907] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:39:42,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:39:42,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-20 05:39:42,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003941039] [2022-07-20 05:39:42,780 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:39:42,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:39:42,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:39:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=205, Unknown=1, NotChecked=0, Total=240 [2022-07-20 05:39:42,781 INFO L87 Difference]: Start difference. First operand 227 states and 256 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:39:45,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:45,279 INFO L93 Difference]: Finished difference Result 337 states and 393 transitions. [2022-07-20 05:39:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:39:45,279 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2022-07-20 05:39:45,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:45,281 INFO L225 Difference]: With dead ends: 337 [2022-07-20 05:39:45,281 INFO L226 Difference]: Without dead ends: 337 [2022-07-20 05:39:45,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=64, Invalid=440, Unknown=2, NotChecked=0, Total=506 [2022-07-20 05:39:45,282 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 110 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:45,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1550 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 2111 Unchecked, 0.2s Time] [2022-07-20 05:39:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-20 05:39:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 236. [2022-07-20 05:39:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 140 states have (on average 1.7285714285714286) internal successors, (242), 220 states have internal predecessors, (242), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (19), 13 states have call predecessors, (19), 12 states have call successors, (19) [2022-07-20 05:39:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 273 transitions. [2022-07-20 05:39:45,292 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 273 transitions. Word has length 73 [2022-07-20 05:39:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:45,293 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 273 transitions. [2022-07-20 05:39:45,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:39:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 273 transitions. [2022-07-20 05:39:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-20 05:39:45,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:45,295 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-07-20 05:39:45,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:39:45,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:45,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:45,512 INFO L85 PathProgramCache]: Analyzing trace with hash -739950276, now seen corresponding path program 1 times [2022-07-20 05:39:45,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:45,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352261648] [2022-07-20 05:39:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:45,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:45,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:45,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105385553] [2022-07-20 05:39:45,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:45,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:45,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:45,543 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) [2022-07-20 05:39:45,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 05:39:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:45,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 05:39:45,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:45,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-20 05:39:46,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:39:46,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:39:46,177 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:39:46,178 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 [2022-07-20 05:39:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-20 05:39:46,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:39:46,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:46,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352261648] [2022-07-20 05:39:46,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:46,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105385553] [2022-07-20 05:39:46,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105385553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:39:46,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:39:46,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-20 05:39:46,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709329911] [2022-07-20 05:39:46,308 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:39:46,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:39:46,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:46,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:39:46,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:39:46,309 INFO L87 Difference]: Start difference. First operand 236 states and 273 transitions. Second operand has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:39:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:47,559 INFO L93 Difference]: Finished difference Result 336 states and 392 transitions. [2022-07-20 05:39:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:39:47,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-07-20 05:39:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:47,561 INFO L225 Difference]: With dead ends: 336 [2022-07-20 05:39:47,561 INFO L226 Difference]: Without dead ends: 336 [2022-07-20 05:39:47,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:39:47,562 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 111 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:47,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 697 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1165 Invalid, 0 Unknown, 550 Unchecked, 1.0s Time] [2022-07-20 05:39:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-07-20 05:39:47,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 226. [2022-07-20 05:39:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 133 states have (on average 1.7518796992481203) internal successors, (233), 212 states have internal predecessors, (233), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-20 05:39:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2022-07-20 05:39:47,570 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 74 [2022-07-20 05:39:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:47,570 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2022-07-20 05:39:47,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:39:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2022-07-20 05:39:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 05:39:47,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:47,572 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:39:47,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-20 05:39:47,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:47,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:47,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:47,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1635791477, now seen corresponding path program 1 times [2022-07-20 05:39:47,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:47,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958938218] [2022-07-20 05:39:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:47,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:47,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:47,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846376556] [2022-07-20 05:39:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:47,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:47,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:47,805 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) [2022-07-20 05:39:47,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 05:39:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:47,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 05:39:47,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:48,107 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:39:48,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:39:48,187 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:39:48,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:39:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 05:39:48,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:39:48,476 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 05:39:48,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-20 05:39:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 05:39:48,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:48,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958938218] [2022-07-20 05:39:48,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:48,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846376556] [2022-07-20 05:39:48,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846376556] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:39:48,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:39:48,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2022-07-20 05:39:48,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296057869] [2022-07-20 05:39:48,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:39:48,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 05:39:48,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 05:39:48,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-20 05:39:48,490 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 05:39:49,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:49,042 INFO L93 Difference]: Finished difference Result 369 states and 430 transitions. [2022-07-20 05:39:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:39:49,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2022-07-20 05:39:49,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:49,045 INFO L225 Difference]: With dead ends: 369 [2022-07-20 05:39:49,045 INFO L226 Difference]: Without dead ends: 369 [2022-07-20 05:39:49,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:39:49,046 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 289 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:49,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1804 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 912 Invalid, 0 Unknown, 368 Unchecked, 0.4s Time] [2022-07-20 05:39:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-07-20 05:39:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 232. [2022-07-20 05:39:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 138 states have (on average 1.7246376811594204) internal successors, (238), 216 states have internal predecessors, (238), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 05:39:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 264 transitions. [2022-07-20 05:39:49,058 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 264 transitions. Word has length 75 [2022-07-20 05:39:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:49,059 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 264 transitions. [2022-07-20 05:39:49,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 05:39:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 264 transitions. [2022-07-20 05:39:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 05:39:49,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:49,064 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:39:49,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:39:49,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:49,291 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:49,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1635791476, now seen corresponding path program 1 times [2022-07-20 05:39:49,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:49,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204369391] [2022-07-20 05:39:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:49,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:49,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:49,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412365197] [2022-07-20 05:39:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:49,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:49,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:49,327 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) [2022-07-20 05:39:49,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 05:39:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:49,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-20 05:39:49,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:49,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-20 05:39:50,074 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:39:50,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:39:50,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:39:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:39:50,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:39:50,258 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:39:50,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:39:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 05:39:50,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:39:50,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:50,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204369391] [2022-07-20 05:39:50,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:50,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412365197] [2022-07-20 05:39:50,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412365197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:39:50,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:39:50,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-20 05:39:50,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342269731] [2022-07-20 05:39:50,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:39:50,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 05:39:50,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 05:39:50,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:39:50,421 INFO L87 Difference]: Start difference. First operand 232 states and 264 transitions. Second operand has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:39:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:51,695 INFO L93 Difference]: Finished difference Result 333 states and 383 transitions. [2022-07-20 05:39:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:39:51,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2022-07-20 05:39:51,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:51,701 INFO L225 Difference]: With dead ends: 333 [2022-07-20 05:39:51,701 INFO L226 Difference]: Without dead ends: 333 [2022-07-20 05:39:51,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:39:51,702 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 113 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 2479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1318 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:51,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1257 Invalid, 2479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1149 Invalid, 0 Unknown, 1318 Unchecked, 1.0s Time] [2022-07-20 05:39:51,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-20 05:39:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 232. [2022-07-20 05:39:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 138 states have (on average 1.7173913043478262) internal successors, (237), 216 states have internal predecessors, (237), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 05:39:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 263 transitions. [2022-07-20 05:39:51,709 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 263 transitions. Word has length 75 [2022-07-20 05:39:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:51,710 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 263 transitions. [2022-07-20 05:39:51,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:39:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 263 transitions. [2022-07-20 05:39:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 05:39:51,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:51,711 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:39:51,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 05:39:51,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:51,928 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash 830071777, now seen corresponding path program 1 times [2022-07-20 05:39:51,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005882150] [2022-07-20 05:39:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:51,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:51,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050711367] [2022-07-20 05:39:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:51,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:51,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:51,954 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) [2022-07-20 05:39:51,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 05:39:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:52,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 05:39:52,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-20 05:39:52,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:39:52,175 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 6 [2022-07-20 05:39:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-20 05:39:52,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:52,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005882150] [2022-07-20 05:39:52,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:52,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050711367] [2022-07-20 05:39:52,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050711367] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:39:52,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:39:52,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-20 05:39:52,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261960347] [2022-07-20 05:39:52,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:39:52,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:39:52,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:52,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:39:52,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:39:52,247 INFO L87 Difference]: Start difference. First operand 232 states and 263 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:39:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:52,477 INFO L93 Difference]: Finished difference Result 250 states and 288 transitions. [2022-07-20 05:39:52,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:39:52,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-07-20 05:39:52,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:52,479 INFO L225 Difference]: With dead ends: 250 [2022-07-20 05:39:52,479 INFO L226 Difference]: Without dead ends: 250 [2022-07-20 05:39:52,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:39:52,480 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 305 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:52,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 1495 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:39:52,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-20 05:39:52,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 231. [2022-07-20 05:39:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 138 states have (on average 1.710144927536232) internal successors, (236), 215 states have internal predecessors, (236), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 05:39:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 262 transitions. [2022-07-20 05:39:52,486 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 262 transitions. Word has length 76 [2022-07-20 05:39:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:52,487 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 262 transitions. [2022-07-20 05:39:52,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:39:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 262 transitions. [2022-07-20 05:39:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-20 05:39:52,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:52,497 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:39:52,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 05:39:52,699 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,SelfDestructingSolverStorable8 [2022-07-20 05:39:52,700 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:52,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:52,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1164939870, now seen corresponding path program 1 times [2022-07-20 05:39:52,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:52,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249863774] [2022-07-20 05:39:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:52,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:52,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:52,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343420703] [2022-07-20 05:39:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:52,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:52,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:52,730 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) [2022-07-20 05:39:52,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 05:39:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:52,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:39:52,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 05:39:52,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:39:52,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:52,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249863774] [2022-07-20 05:39:52,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:52,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343420703] [2022-07-20 05:39:52,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343420703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:39:52,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:39:52,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:39:52,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30725193] [2022-07-20 05:39:52,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:39:52,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:39:52,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:52,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:39:52,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:39:52,901 INFO L87 Difference]: Start difference. First operand 231 states and 262 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:39:52,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:52,995 INFO L93 Difference]: Finished difference Result 238 states and 273 transitions. [2022-07-20 05:39:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:39:53,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2022-07-20 05:39:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:53,002 INFO L225 Difference]: With dead ends: 238 [2022-07-20 05:39:53,002 INFO L226 Difference]: Without dead ends: 238 [2022-07-20 05:39:53,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:39:53,003 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 90 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:53,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 353 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:39:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-20 05:39:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2022-07-20 05:39:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 138 states have (on average 1.7028985507246377) internal successors, (235), 214 states have internal predecessors, (235), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-20 05:39:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 261 transitions. [2022-07-20 05:39:53,014 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 261 transitions. Word has length 78 [2022-07-20 05:39:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:53,015 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 261 transitions. [2022-07-20 05:39:53,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:39:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 261 transitions. [2022-07-20 05:39:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-20 05:39:53,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:53,016 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:39:53,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 05:39:53,239 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,SelfDestructingSolverStorable9 [2022-07-20 05:39:53,239 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash -76043767, now seen corresponding path program 1 times [2022-07-20 05:39:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:53,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419475559] [2022-07-20 05:39:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:53,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:53,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:53,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143730989] [2022-07-20 05:39:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:53,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:53,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:53,256 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) [2022-07-20 05:39:53,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 05:39:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:53,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 05:39:53,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:53,511 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:39:53,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:39:53,575 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:39:53,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:39:53,665 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:39:53,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:39:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 05:39:53,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:39:53,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:53,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419475559] [2022-07-20 05:39:53,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:53,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143730989] [2022-07-20 05:39:53,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143730989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:39:53,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:39:53,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-20 05:39:53,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651204526] [2022-07-20 05:39:53,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:39:53,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:39:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:39:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:39:53,873 INFO L87 Difference]: Start difference. First operand 230 states and 261 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:39:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:54,387 INFO L93 Difference]: Finished difference Result 399 states and 465 transitions. [2022-07-20 05:39:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:39:54,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2022-07-20 05:39:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:54,389 INFO L225 Difference]: With dead ends: 399 [2022-07-20 05:39:54,389 INFO L226 Difference]: Without dead ends: 399 [2022-07-20 05:39:54,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-07-20 05:39:54,390 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 263 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:54,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 2065 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 964 Invalid, 0 Unknown, 480 Unchecked, 0.4s Time] [2022-07-20 05:39:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-20 05:39:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 262. [2022-07-20 05:39:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 165 states have (on average 1.612121212121212) internal successors, (266), 240 states have internal predecessors, (266), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 05:39:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 302 transitions. [2022-07-20 05:39:54,400 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 302 transitions. Word has length 82 [2022-07-20 05:39:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:54,400 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 302 transitions. [2022-07-20 05:39:54,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:39:54,400 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 302 transitions. [2022-07-20 05:39:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-20 05:39:54,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:54,401 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:39:54,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:39:54,625 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,SelfDestructingSolverStorable10 [2022-07-20 05:39:54,625 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:54,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:54,625 INFO L85 PathProgramCache]: Analyzing trace with hash -76043766, now seen corresponding path program 1 times [2022-07-20 05:39:54,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:54,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502932458] [2022-07-20 05:39:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:54,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:54,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:54,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794182869] [2022-07-20 05:39:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:54,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:54,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:54,641 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) [2022-07-20 05:39:54,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 05:39:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:54,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-20 05:39:54,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:54,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-20 05:39:55,469 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:39:55,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:39:55,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:39:55,815 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:39:55,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:39:55,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:39:56,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:39:56,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:39:56,022 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:39:56,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:39:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 05:39:56,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:39:56,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:56,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502932458] [2022-07-20 05:39:56,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:56,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794182869] [2022-07-20 05:39:56,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794182869] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:39:56,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:39:56,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-07-20 05:39:56,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006488890] [2022-07-20 05:39:56,295 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:39:56,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 05:39:56,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:56,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 05:39:56,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-07-20 05:39:56,296 INFO L87 Difference]: Start difference. First operand 262 states and 302 transitions. Second operand has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:39:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:57,789 INFO L93 Difference]: Finished difference Result 371 states and 431 transitions. [2022-07-20 05:39:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:39:57,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2022-07-20 05:39:57,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:57,791 INFO L225 Difference]: With dead ends: 371 [2022-07-20 05:39:57,791 INFO L226 Difference]: Without dead ends: 371 [2022-07-20 05:39:57,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-07-20 05:39:57,792 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 116 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 3920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2784 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:57,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1442 Invalid, 3920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1124 Invalid, 0 Unknown, 2784 Unchecked, 1.1s Time] [2022-07-20 05:39:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-07-20 05:39:57,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 269. [2022-07-20 05:39:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 172 states have (on average 1.5930232558139534) internal successors, (274), 247 states have internal predecessors, (274), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 05:39:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 310 transitions. [2022-07-20 05:39:57,800 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 310 transitions. Word has length 82 [2022-07-20 05:39:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:57,800 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 310 transitions. [2022-07-20 05:39:57,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:39:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 310 transitions. [2022-07-20 05:39:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-20 05:39:57,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:57,801 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:39:57,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-20 05:39:58,007 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,SelfDestructingSolverStorable11 [2022-07-20 05:39:58,007 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:58,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1937610552, now seen corresponding path program 1 times [2022-07-20 05:39:58,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:58,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126677642] [2022-07-20 05:39:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:58,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:58,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:58,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154562808] [2022-07-20 05:39:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:58,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:58,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:58,021 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) [2022-07-20 05:39:58,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 05:39:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:58,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:39:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 05:39:58,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:39:58,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:39:58,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126677642] [2022-07-20 05:39:58,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:39:58,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154562808] [2022-07-20 05:39:58,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154562808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:39:58,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:39:58,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:39:58,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327851940] [2022-07-20 05:39:58,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:39:58,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:39:58,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:39:58,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:39:58,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:39:58,185 INFO L87 Difference]: Start difference. First operand 269 states and 310 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:39:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:39:58,304 INFO L93 Difference]: Finished difference Result 282 states and 328 transitions. [2022-07-20 05:39:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:39:58,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 83 [2022-07-20 05:39:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:39:58,306 INFO L225 Difference]: With dead ends: 282 [2022-07-20 05:39:58,306 INFO L226 Difference]: Without dead ends: 282 [2022-07-20 05:39:58,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:39:58,307 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 157 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:39:58,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 517 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:39:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-07-20 05:39:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 268. [2022-07-20 05:39:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 172 states have (on average 1.5872093023255813) internal successors, (273), 246 states have internal predecessors, (273), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 05:39:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 309 transitions. [2022-07-20 05:39:58,315 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 309 transitions. Word has length 83 [2022-07-20 05:39:58,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:39:58,315 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 309 transitions. [2022-07-20 05:39:58,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:39:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 309 transitions. [2022-07-20 05:39:58,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-20 05:39:58,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:39:58,316 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:39:58,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 05:39:58,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 05:39:58,529 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:39:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:39:58,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1937610553, now seen corresponding path program 1 times [2022-07-20 05:39:58,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:39:58,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411382964] [2022-07-20 05:39:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:58,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:39:58,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:39:58,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143586078] [2022-07-20 05:39:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:39:58,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:39:58,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:39:58,564 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) [2022-07-20 05:39:58,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 05:39:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:39:58,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-20 05:39:58,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:39:58,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-20 05:39:58,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:39:59,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:39:59,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:40:00,018 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:00,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:00,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:00,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:40:00,463 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:40:00,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:40:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 05:40:01,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:01,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:01,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411382964] [2022-07-20 05:40:01,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:01,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143586078] [2022-07-20 05:40:01,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143586078] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:01,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:01,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-20 05:40:01,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061854722] [2022-07-20 05:40:01,869 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:01,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 05:40:01,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 05:40:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:40:01,871 INFO L87 Difference]: Start difference. First operand 268 states and 309 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:02,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:02,573 INFO L93 Difference]: Finished difference Result 415 states and 499 transitions. [2022-07-20 05:40:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:40:02,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2022-07-20 05:40:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:02,575 INFO L225 Difference]: With dead ends: 415 [2022-07-20 05:40:02,576 INFO L226 Difference]: Without dead ends: 415 [2022-07-20 05:40:02,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-07-20 05:40:02,577 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 114 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2581 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:02,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1780 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 2581 Unchecked, 0.2s Time] [2022-07-20 05:40:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-07-20 05:40:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 311. [2022-07-20 05:40:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 209 states have (on average 1.5119617224880382) internal successors, (316), 283 states have internal predecessors, (316), 22 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (39), 24 states have call predecessors, (39), 22 states have call successors, (39) [2022-07-20 05:40:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 377 transitions. [2022-07-20 05:40:02,588 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 377 transitions. Word has length 83 [2022-07-20 05:40:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:02,589 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 377 transitions. [2022-07-20 05:40:02,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 377 transitions. [2022-07-20 05:40:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-20 05:40:02,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:02,590 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:02,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:02,811 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,SelfDestructingSolverStorable13 [2022-07-20 05:40:02,811 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:02,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:02,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1702611176, now seen corresponding path program 1 times [2022-07-20 05:40:02,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:02,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350837505] [2022-07-20 05:40:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:02,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:02,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:02,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324116208] [2022-07-20 05:40:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:02,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:02,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:02,831 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) [2022-07-20 05:40:02,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 05:40:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-20 05:40:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:03,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-20 05:40:03,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:40:03,951 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:03,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:03,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:40:04,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:04,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:40:04,315 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:40:04,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:40:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 05:40:05,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:05,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:05,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350837505] [2022-07-20 05:40:05,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:05,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324116208] [2022-07-20 05:40:05,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324116208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:05,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:05,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-20 05:40:05,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841167053] [2022-07-20 05:40:05,658 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:05,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 05:40:05,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:05,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 05:40:05,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-20 05:40:05,660 INFO L87 Difference]: Start difference. First operand 311 states and 377 transitions. Second operand has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:06,068 INFO L93 Difference]: Finished difference Result 517 states and 654 transitions. [2022-07-20 05:40:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 05:40:06,069 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2022-07-20 05:40:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:06,071 INFO L225 Difference]: With dead ends: 517 [2022-07-20 05:40:06,071 INFO L226 Difference]: Without dead ends: 517 [2022-07-20 05:40:06,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-07-20 05:40:06,072 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 170 mSDsluCounter, 2751 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 5428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5192 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:06,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 3012 Invalid, 5428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 0 Unknown, 5192 Unchecked, 0.2s Time] [2022-07-20 05:40:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-07-20 05:40:06,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 318. [2022-07-20 05:40:06,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 290 states have internal predecessors, (324), 22 states have call successors, (22), 3 states have call predecessors, (22), 6 states have return successors, (55), 24 states have call predecessors, (55), 22 states have call successors, (55) [2022-07-20 05:40:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 401 transitions. [2022-07-20 05:40:06,085 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 401 transitions. Word has length 84 [2022-07-20 05:40:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:06,086 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 401 transitions. [2022-07-20 05:40:06,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 401 transitions. [2022-07-20 05:40:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-20 05:40:06,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:06,087 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:06,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:06,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:06,304 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash 567625738, now seen corresponding path program 2 times [2022-07-20 05:40:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:06,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197620663] [2022-07-20 05:40:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:06,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:06,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:06,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854249718] [2022-07-20 05:40:06,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:40:06,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:06,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:06,326 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) [2022-07-20 05:40:06,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 05:40:06,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:40:06,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:40:06,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 05:40:06,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:06,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:40:06,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-20 05:40:07,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:07,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:40:07,664 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:07,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:08,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:08,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:40:08,018 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:40:08,018 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 [2022-07-20 05:40:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 05:40:09,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:09,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:09,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197620663] [2022-07-20 05:40:09,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:09,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854249718] [2022-07-20 05:40:09,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854249718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:09,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:09,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-20 05:40:09,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184725348] [2022-07-20 05:40:09,315 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:09,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:40:09,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:40:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:40:09,316 INFO L87 Difference]: Start difference. First operand 318 states and 401 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:09,978 INFO L93 Difference]: Finished difference Result 483 states and 610 transitions. [2022-07-20 05:40:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:40:09,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 84 [2022-07-20 05:40:09,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:09,981 INFO L225 Difference]: With dead ends: 483 [2022-07-20 05:40:09,981 INFO L226 Difference]: Without dead ends: 483 [2022-07-20 05:40:09,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-07-20 05:40:09,982 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 114 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1856 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:09,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 923 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 219 Invalid, 0 Unknown, 1856 Unchecked, 0.2s Time] [2022-07-20 05:40:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-07-20 05:40:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 333. [2022-07-20 05:40:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 225 states have (on average 1.4844444444444445) internal successors, (334), 301 states have internal predecessors, (334), 26 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (68), 28 states have call predecessors, (68), 26 states have call successors, (68) [2022-07-20 05:40:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 428 transitions. [2022-07-20 05:40:10,003 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 428 transitions. Word has length 84 [2022-07-20 05:40:10,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:10,003 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 428 transitions. [2022-07-20 05:40:10,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 428 transitions. [2022-07-20 05:40:10,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-20 05:40:10,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:10,005 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:10,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:10,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-20 05:40:10,223 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:10,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1414632217, now seen corresponding path program 3 times [2022-07-20 05:40:10,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:10,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7761172] [2022-07-20 05:40:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:10,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:10,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:10,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783142063] [2022-07-20 05:40:10,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:40:10,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:10,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:10,240 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) [2022-07-20 05:40:10,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 05:40:10,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 05:40:10,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:40:10,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 05:40:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-20 05:40:10,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:40:10,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7761172] [2022-07-20 05:40:10,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:10,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783142063] [2022-07-20 05:40:10,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783142063] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:40:10,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:40:10,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:40:10,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114112923] [2022-07-20 05:40:10,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:40:10,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:40:10,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:40:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:40:10,412 INFO L87 Difference]: Start difference. First operand 333 states and 428 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:40:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:10,454 INFO L93 Difference]: Finished difference Result 298 states and 356 transitions. [2022-07-20 05:40:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:40:10,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 85 [2022-07-20 05:40:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:10,456 INFO L225 Difference]: With dead ends: 298 [2022-07-20 05:40:10,456 INFO L226 Difference]: Without dead ends: 288 [2022-07-20 05:40:10,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:40:10,457 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 17 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:10,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 709 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:40:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-20 05:40:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 270. [2022-07-20 05:40:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 174 states have (on average 1.5804597701149425) internal successors, (275), 248 states have internal predecessors, (275), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 05:40:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 311 transitions. [2022-07-20 05:40:10,465 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 311 transitions. Word has length 85 [2022-07-20 05:40:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:10,465 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 311 transitions. [2022-07-20 05:40:10,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:40:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 311 transitions. [2022-07-20 05:40:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-20 05:40:10,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:10,466 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:10,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:10,691 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,SelfDestructingSolverStorable16 [2022-07-20 05:40:10,691 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:10,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:10,691 INFO L85 PathProgramCache]: Analyzing trace with hash -560943855, now seen corresponding path program 4 times [2022-07-20 05:40:10,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:10,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618519501] [2022-07-20 05:40:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:10,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:10,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:10,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653035033] [2022-07-20 05:40:10,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:40:10,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:10,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:10,706 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) [2022-07-20 05:40:10,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 05:40:10,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:40:10,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:40:10,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-20 05:40:10,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:10,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:40:10,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:40:11,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:11,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-20 05:40:11,480 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:11,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:11,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:11,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-20 05:40:11,625 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:40:11,626 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 [2022-07-20 05:40:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-20 05:40:12,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:12,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618519501] [2022-07-20 05:40:12,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653035033] [2022-07-20 05:40:12,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653035033] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:12,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:12,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-20 05:40:12,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024881972] [2022-07-20 05:40:12,459 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:12,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:40:12,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:40:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:40:12,460 INFO L87 Difference]: Start difference. First operand 270 states and 311 transitions. Second operand has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:12,861 INFO L93 Difference]: Finished difference Result 417 states and 501 transitions. [2022-07-20 05:40:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:40:12,862 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2022-07-20 05:40:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:12,866 INFO L225 Difference]: With dead ends: 417 [2022-07-20 05:40:12,866 INFO L226 Difference]: Without dead ends: 417 [2022-07-20 05:40:12,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-07-20 05:40:12,868 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 114 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2089 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:12,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1022 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 223 Invalid, 0 Unknown, 2089 Unchecked, 0.2s Time] [2022-07-20 05:40:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-07-20 05:40:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 313. [2022-07-20 05:40:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 211 states have (on average 1.5071090047393365) internal successors, (318), 285 states have internal predecessors, (318), 22 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (39), 24 states have call predecessors, (39), 22 states have call successors, (39) [2022-07-20 05:40:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 379 transitions. [2022-07-20 05:40:12,883 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 379 transitions. Word has length 89 [2022-07-20 05:40:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:12,883 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 379 transitions. [2022-07-20 05:40:12,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 379 transitions. [2022-07-20 05:40:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-20 05:40:12,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:12,884 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:12,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:13,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 05:40:13,099 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:13,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1182337176, now seen corresponding path program 5 times [2022-07-20 05:40:13,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:13,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830049214] [2022-07-20 05:40:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:13,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:13,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:13,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002795356] [2022-07-20 05:40:13,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:40:13,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:13,119 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) [2022-07-20 05:40:13,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 05:40:13,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:40:13,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:40:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:40:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-20 05:40:13,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-20 05:40:13,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:13,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830049214] [2022-07-20 05:40:13,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:13,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002795356] [2022-07-20 05:40:13,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002795356] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:40:13,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:40:13,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-20 05:40:13,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869831393] [2022-07-20 05:40:13,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:13,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:40:13,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:13,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:40:13,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:40:13,552 INFO L87 Difference]: Start difference. First operand 313 states and 379 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-20 05:40:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:13,744 INFO L93 Difference]: Finished difference Result 302 states and 347 transitions. [2022-07-20 05:40:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:40:13,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 90 [2022-07-20 05:40:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:13,746 INFO L225 Difference]: With dead ends: 302 [2022-07-20 05:40:13,746 INFO L226 Difference]: Without dead ends: 287 [2022-07-20 05:40:13,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:40:13,747 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 60 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:13,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1180 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:40:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-20 05:40:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-07-20 05:40:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 190 states have (on average 1.5473684210526315) internal successors, (294), 264 states have internal predecessors, (294), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 05:40:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 330 transitions. [2022-07-20 05:40:13,754 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 330 transitions. Word has length 90 [2022-07-20 05:40:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:13,754 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 330 transitions. [2022-07-20 05:40:13,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-20 05:40:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 330 transitions. [2022-07-20 05:40:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-20 05:40:13,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:13,755 INFO L195 NwaCegarLoop]: trace histogram [22, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:13,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:13,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:13,968 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:13,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1234441241, now seen corresponding path program 6 times [2022-07-20 05:40:13,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:13,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347185729] [2022-07-20 05:40:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:13,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:13,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167056441] [2022-07-20 05:40:13,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:40:13,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:13,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:13,990 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) [2022-07-20 05:40:14,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 05:40:16,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-20 05:40:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:40:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 05:40:16,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-20 05:40:16,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-20 05:40:16,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:16,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347185729] [2022-07-20 05:40:16,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:16,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167056441] [2022-07-20 05:40:16,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167056441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:40:16,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:40:16,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-20 05:40:16,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936698370] [2022-07-20 05:40:16,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:16,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:40:16,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:16,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:40:16,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:40:16,217 INFO L87 Difference]: Start difference. First operand 287 states and 330 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-20 05:40:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:16,459 INFO L93 Difference]: Finished difference Result 301 states and 346 transitions. [2022-07-20 05:40:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:40:16,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 105 [2022-07-20 05:40:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:16,461 INFO L225 Difference]: With dead ends: 301 [2022-07-20 05:40:16,461 INFO L226 Difference]: Without dead ends: 291 [2022-07-20 05:40:16,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:40:16,462 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 72 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:16,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1649 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:40:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-07-20 05:40:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-07-20 05:40:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.5257731958762886) internal successors, (296), 268 states have internal predecessors, (296), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 05:40:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 332 transitions. [2022-07-20 05:40:16,468 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 332 transitions. Word has length 105 [2022-07-20 05:40:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:16,468 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 332 transitions. [2022-07-20 05:40:16,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-20 05:40:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 332 transitions. [2022-07-20 05:40:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 05:40:16,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:16,470 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:16,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:16,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:16,687 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash 927290713, now seen corresponding path program 7 times [2022-07-20 05:40:16,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:16,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761933983] [2022-07-20 05:40:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:16,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:16,716 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:16,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455027511] [2022-07-20 05:40:16,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:40:16,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:16,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:16,718 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) [2022-07-20 05:40:16,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 05:40:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:17,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-20 05:40:17,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:17,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:40:18,274 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:18,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:18,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:40:18,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:18,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:40:18,436 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:40:18,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:40:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 326 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-07-20 05:40:18,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:18,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761933983] [2022-07-20 05:40:18,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:18,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455027511] [2022-07-20 05:40:18,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455027511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:18,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:18,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-20 05:40:18,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131651389] [2022-07-20 05:40:18,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:18,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 05:40:18,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 05:40:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:40:18,608 INFO L87 Difference]: Start difference. First operand 291 states and 332 transitions. Second operand has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:19,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:19,846 INFO L93 Difference]: Finished difference Result 516 states and 602 transitions. [2022-07-20 05:40:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:40:19,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 109 [2022-07-20 05:40:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:19,848 INFO L225 Difference]: With dead ends: 516 [2022-07-20 05:40:19,848 INFO L226 Difference]: Without dead ends: 516 [2022-07-20 05:40:19,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:40:19,849 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 292 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:19,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 793 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1829 Invalid, 0 Unknown, 713 Unchecked, 1.1s Time] [2022-07-20 05:40:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-07-20 05:40:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 299. [2022-07-20 05:40:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 202 states have (on average 1.5198019801980198) internal successors, (307), 276 states have internal predecessors, (307), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 05:40:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 343 transitions. [2022-07-20 05:40:19,858 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 343 transitions. Word has length 109 [2022-07-20 05:40:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:19,858 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 343 transitions. [2022-07-20 05:40:19,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 343 transitions. [2022-07-20 05:40:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 05:40:19,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:19,860 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:19,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:20,071 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,SelfDestructingSolverStorable20 [2022-07-20 05:40:20,072 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:20,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2068145114, now seen corresponding path program 1 times [2022-07-20 05:40:20,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:20,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083761475] [2022-07-20 05:40:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:20,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:20,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:20,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642649435] [2022-07-20 05:40:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:20,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:20,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:20,096 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) [2022-07-20 05:40:20,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 05:40:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:20,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:40:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:40:20,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:40:20,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:20,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083761475] [2022-07-20 05:40:20,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:20,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642649435] [2022-07-20 05:40:20,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642649435] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:40:20,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:40:20,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:40:20,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972744799] [2022-07-20 05:40:20,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:40:20,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:40:20,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:20,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:40:20,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:20,376 INFO L87 Difference]: Start difference. First operand 299 states and 343 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:40:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:20,487 INFO L93 Difference]: Finished difference Result 304 states and 351 transitions. [2022-07-20 05:40:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:40:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 111 [2022-07-20 05:40:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:20,489 INFO L225 Difference]: With dead ends: 304 [2022-07-20 05:40:20,489 INFO L226 Difference]: Without dead ends: 304 [2022-07-20 05:40:20,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:20,489 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 76 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:20,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 358 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:40:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-20 05:40:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2022-07-20 05:40:20,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 202 states have (on average 1.5148514851485149) internal successors, (306), 275 states have internal predecessors, (306), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-20 05:40:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 342 transitions. [2022-07-20 05:40:20,496 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 342 transitions. Word has length 111 [2022-07-20 05:40:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:20,496 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 342 transitions. [2022-07-20 05:40:20,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:40:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 342 transitions. [2022-07-20 05:40:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-20 05:40:20,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:20,498 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:20,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:20,698 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,SelfDestructingSolverStorable21 [2022-07-20 05:40:20,699 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:20,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:20,699 INFO L85 PathProgramCache]: Analyzing trace with hash -807331391, now seen corresponding path program 1 times [2022-07-20 05:40:20,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:20,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669912804] [2022-07-20 05:40:20,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:20,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:20,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:20,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916875407] [2022-07-20 05:40:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:20,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:20,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:20,724 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) [2022-07-20 05:40:20,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 05:40:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:20,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 05:40:20,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:21,100 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:21,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:21,166 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:21,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:21,257 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:40:21,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-07-20 05:40:21,385 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:40:21,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 05:40:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 328 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-20 05:40:21,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:21,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:21,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669912804] [2022-07-20 05:40:21,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:21,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916875407] [2022-07-20 05:40:21,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916875407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:21,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:21,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-20 05:40:21,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489473760] [2022-07-20 05:40:21,967 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:21,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:40:21,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:40:21,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-07-20 05:40:21,969 INFO L87 Difference]: Start difference. First operand 298 states and 342 transitions. Second operand has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:26,577 INFO L93 Difference]: Finished difference Result 421 states and 488 transitions. [2022-07-20 05:40:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:40:26,578 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 115 [2022-07-20 05:40:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:26,579 INFO L225 Difference]: With dead ends: 421 [2022-07-20 05:40:26,579 INFO L226 Difference]: Without dead ends: 421 [2022-07-20 05:40:26,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 05:40:26,580 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 206 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 661 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:26,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 2657 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 814 Invalid, 0 Unknown, 661 Unchecked, 0.4s Time] [2022-07-20 05:40:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-07-20 05:40:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 411. [2022-07-20 05:40:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 302 states have (on average 1.403973509933775) internal successors, (424), 374 states have internal predecessors, (424), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-20 05:40:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 482 transitions. [2022-07-20 05:40:26,590 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 482 transitions. Word has length 115 [2022-07-20 05:40:26,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:26,590 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 482 transitions. [2022-07-20 05:40:26,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 482 transitions. [2022-07-20 05:40:26,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-20 05:40:26,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:26,591 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:26,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:26,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:26,811 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:26,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:26,812 INFO L85 PathProgramCache]: Analyzing trace with hash -807331390, now seen corresponding path program 1 times [2022-07-20 05:40:26,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:26,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004524064] [2022-07-20 05:40:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:26,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:26,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683441496] [2022-07-20 05:40:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:26,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:26,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:26,843 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) [2022-07-20 05:40:26,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 05:40:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:30,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-20 05:40:30,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:30,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-20 05:40:30,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-20 05:40:31,565 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:40:31,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2022-07-20 05:40:31,618 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:31,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:32,089 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:40:32,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2022-07-20 05:40:32,156 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:32,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:32,465 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:40:32,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2022-07-20 05:40:32,533 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-20 05:40:32,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-20 05:40:32,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:32,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:40:32,855 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-20 05:40:32,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-07-20 05:40:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 215 proven. 295 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-20 05:40:33,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:33,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:33,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004524064] [2022-07-20 05:40:33,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:33,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683441496] [2022-07-20 05:40:33,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683441496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:33,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:33,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-20 05:40:33,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335775447] [2022-07-20 05:40:33,271 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:33,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 05:40:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:33,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 05:40:33,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:40:33,272 INFO L87 Difference]: Start difference. First operand 411 states and 482 transitions. Second operand has 29 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:40:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:35,266 INFO L93 Difference]: Finished difference Result 521 states and 612 transitions. [2022-07-20 05:40:35,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 05:40:35,267 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 115 [2022-07-20 05:40:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:35,270 INFO L225 Difference]: With dead ends: 521 [2022-07-20 05:40:35,270 INFO L226 Difference]: Without dead ends: 521 [2022-07-20 05:40:35,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 05:40:35,271 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 112 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 4077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2868 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:35,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1679 Invalid, 4077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1197 Invalid, 0 Unknown, 2868 Unchecked, 1.5s Time] [2022-07-20 05:40:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-07-20 05:40:35,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 418. [2022-07-20 05:40:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 309 states have (on average 1.3980582524271845) internal successors, (432), 381 states have internal predecessors, (432), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-20 05:40:35,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 490 transitions. [2022-07-20 05:40:35,280 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 490 transitions. Word has length 115 [2022-07-20 05:40:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:35,280 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 490 transitions. [2022-07-20 05:40:35,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:40:35,281 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 490 transitions. [2022-07-20 05:40:35,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-20 05:40:35,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:35,282 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:35,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-20 05:40:35,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:35,503 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash 742530710, now seen corresponding path program 1 times [2022-07-20 05:40:35,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:35,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545723942] [2022-07-20 05:40:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:35,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:35,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:35,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060936937] [2022-07-20 05:40:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:35,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:35,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:35,532 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) [2022-07-20 05:40:35,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 05:40:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:40:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:40:35,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:40:35,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:35,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545723942] [2022-07-20 05:40:35,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:35,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060936937] [2022-07-20 05:40:35,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060936937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:40:35,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:40:35,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:40:35,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312064020] [2022-07-20 05:40:35,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:40:35,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:40:35,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:35,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:40:35,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:40:35,878 INFO L87 Difference]: Start difference. First operand 418 states and 490 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:35,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:35,997 INFO L93 Difference]: Finished difference Result 426 states and 501 transitions. [2022-07-20 05:40:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:40:35,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 116 [2022-07-20 05:40:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:35,999 INFO L225 Difference]: With dead ends: 426 [2022-07-20 05:40:35,999 INFO L226 Difference]: Without dead ends: 426 [2022-07-20 05:40:35,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:40:36,000 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 130 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:36,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 514 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:40:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-07-20 05:40:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 417. [2022-07-20 05:40:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 309 states have (on average 1.3948220064724919) internal successors, (431), 380 states have internal predecessors, (431), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-20 05:40:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 489 transitions. [2022-07-20 05:40:36,008 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 489 transitions. Word has length 116 [2022-07-20 05:40:36,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:36,009 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 489 transitions. [2022-07-20 05:40:36,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 489 transitions. [2022-07-20 05:40:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-20 05:40:36,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:36,010 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:36,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:36,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-20 05:40:36,223 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:36,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:36,224 INFO L85 PathProgramCache]: Analyzing trace with hash 742530711, now seen corresponding path program 1 times [2022-07-20 05:40:36,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:36,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471119068] [2022-07-20 05:40:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:36,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:36,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:36,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955785754] [2022-07-20 05:40:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:36,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:36,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:36,257 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) [2022-07-20 05:40:36,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 05:40:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:36,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 05:40:36,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-20 05:40:36,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:36,788 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:40:36,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-20 05:40:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-20 05:40:37,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:37,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471119068] [2022-07-20 05:40:37,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:37,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955785754] [2022-07-20 05:40:37,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955785754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:40:37,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:40:37,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-20 05:40:37,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488477388] [2022-07-20 05:40:37,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:37,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:40:37,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:37,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:40:37,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:40:37,020 INFO L87 Difference]: Start difference. First operand 417 states and 489 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-20 05:40:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:37,268 INFO L93 Difference]: Finished difference Result 425 states and 500 transitions. [2022-07-20 05:40:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:40:37,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 116 [2022-07-20 05:40:37,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:37,270 INFO L225 Difference]: With dead ends: 425 [2022-07-20 05:40:37,270 INFO L226 Difference]: Without dead ends: 425 [2022-07-20 05:40:37,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:40:37,271 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 340 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:37,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 2244 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:40:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-07-20 05:40:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 416. [2022-07-20 05:40:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 309 states have (on average 1.3915857605177993) internal successors, (430), 379 states have internal predecessors, (430), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-20 05:40:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 488 transitions. [2022-07-20 05:40:37,280 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 488 transitions. Word has length 116 [2022-07-20 05:40:37,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:37,280 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 488 transitions. [2022-07-20 05:40:37,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-20 05:40:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 488 transitions. [2022-07-20 05:40:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-20 05:40:37,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:37,281 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:37,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-20 05:40:37,503 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,SelfDestructingSolverStorable25 [2022-07-20 05:40:37,503 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:37,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash 607443032, now seen corresponding path program 1 times [2022-07-20 05:40:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:37,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949764373] [2022-07-20 05:40:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:37,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:37,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:37,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177786313] [2022-07-20 05:40:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:37,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:37,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:37,527 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) [2022-07-20 05:40:37,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 05:40:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:37,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:40:37,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:40:37,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:40:37,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:37,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949764373] [2022-07-20 05:40:37,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177786313] [2022-07-20 05:40:37,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177786313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:40:37,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:40:37,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:40:37,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817179702] [2022-07-20 05:40:37,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:40:37,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:40:37,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:37,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:40:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:37,905 INFO L87 Difference]: Start difference. First operand 416 states and 488 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:40:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:38,018 INFO L93 Difference]: Finished difference Result 419 states and 493 transitions. [2022-07-20 05:40:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:40:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 118 [2022-07-20 05:40:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:38,020 INFO L225 Difference]: With dead ends: 419 [2022-07-20 05:40:38,020 INFO L226 Difference]: Without dead ends: 419 [2022-07-20 05:40:38,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:38,020 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 60 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:38,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 364 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:40:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-07-20 05:40:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 415. [2022-07-20 05:40:38,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 309 states have (on average 1.3883495145631068) internal successors, (429), 378 states have internal predecessors, (429), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-20 05:40:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 487 transitions. [2022-07-20 05:40:38,028 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 487 transitions. Word has length 118 [2022-07-20 05:40:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:38,028 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 487 transitions. [2022-07-20 05:40:38,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:40:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 487 transitions. [2022-07-20 05:40:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-20 05:40:38,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:38,029 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:38,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:38,255 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,SelfDestructingSolverStorable26 [2022-07-20 05:40:38,255 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:38,256 INFO L85 PathProgramCache]: Analyzing trace with hash -755993409, now seen corresponding path program 1 times [2022-07-20 05:40:38,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:38,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693903726] [2022-07-20 05:40:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:38,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:38,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:38,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907210600] [2022-07-20 05:40:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:38,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:38,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:38,298 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) [2022-07-20 05:40:38,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 05:40:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:38,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-20 05:40:38,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:38,823 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:38,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:38,928 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-20 05:40:38,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-20 05:40:39,062 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-20 05:40:39,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-07-20 05:40:39,196 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-20 05:40:39,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 52 [2022-07-20 05:40:39,436 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-20 05:40:39,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 59 [2022-07-20 05:40:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 5 proven. 498 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-20 05:40:42,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:42,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:42,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693903726] [2022-07-20 05:40:42,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:42,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907210600] [2022-07-20 05:40:42,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907210600] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:42,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:42,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-20 05:40:42,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84674980] [2022-07-20 05:40:42,315 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:42,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 05:40:42,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:42,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 05:40:42,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=722, Unknown=1, NotChecked=0, Total=812 [2022-07-20 05:40:42,316 INFO L87 Difference]: Start difference. First operand 415 states and 487 transitions. Second operand has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:40:46,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:46,799 INFO L93 Difference]: Finished difference Result 665 states and 794 transitions. [2022-07-20 05:40:46,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 05:40:46,799 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 122 [2022-07-20 05:40:46,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:46,801 INFO L225 Difference]: With dead ends: 665 [2022-07-20 05:40:46,801 INFO L226 Difference]: Without dead ends: 665 [2022-07-20 05:40:46,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=174, Invalid=1229, Unknown=3, NotChecked=0, Total=1406 [2022-07-20 05:40:46,802 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 137 mSDsluCounter, 3003 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:46,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 3219 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 550 Invalid, 0 Unknown, 658 Unchecked, 0.2s Time] [2022-07-20 05:40:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-07-20 05:40:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 660. [2022-07-20 05:40:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 525 states have (on average 1.3085714285714285) internal successors, (687), 594 states have internal predecessors, (687), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-20 05:40:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 791 transitions. [2022-07-20 05:40:46,814 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 791 transitions. Word has length 122 [2022-07-20 05:40:46,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:46,814 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 791 transitions. [2022-07-20 05:40:46,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:40:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 791 transitions. [2022-07-20 05:40:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-20 05:40:46,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:46,815 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:46,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-20 05:40:47,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-20 05:40:47,031 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash -755993408, now seen corresponding path program 1 times [2022-07-20 05:40:47,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:47,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222567214] [2022-07-20 05:40:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:47,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:47,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:47,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107788779] [2022-07-20 05:40:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:47,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:47,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:47,059 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) [2022-07-20 05:40:47,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 05:40:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:47,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 168 conjunts are in the unsatisfiable core [2022-07-20 05:40:47,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:47,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-20 05:40:47,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-20 05:40:48,671 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:40:48,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2022-07-20 05:40:48,721 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:48,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:49,036 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:40:49,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2022-07-20 05:40:49,102 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-20 05:40:49,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-20 05:40:49,417 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:40:49,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2022-07-20 05:40:49,497 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-20 05:40:49,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-07-20 05:40:50,039 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-07-20 05:40:50,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 32 treesize of output 57 [2022-07-20 05:40:50,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:40:50,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:50,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:40:50,479 INFO L356 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2022-07-20 05:40:50,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 39 [2022-07-20 05:40:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 20 proven. 342 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-07-20 05:40:50,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:50,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:50,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222567214] [2022-07-20 05:40:50,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:50,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107788779] [2022-07-20 05:40:50,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107788779] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:50,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:50,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-20 05:40:50,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144952912] [2022-07-20 05:40:50,943 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:50,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 05:40:50,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:50,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 05:40:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:40:50,945 INFO L87 Difference]: Start difference. First operand 660 states and 791 transitions. Second operand has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 05:40:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:53,213 INFO L93 Difference]: Finished difference Result 785 states and 937 transitions. [2022-07-20 05:40:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 05:40:53,214 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 122 [2022-07-20 05:40:53,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:53,217 INFO L225 Difference]: With dead ends: 785 [2022-07-20 05:40:53,217 INFO L226 Difference]: Without dead ends: 785 [2022-07-20 05:40:53,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 05:40:53,218 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 115 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1110 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:53,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 788 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1055 Invalid, 0 Unknown, 1110 Unchecked, 1.7s Time] [2022-07-20 05:40:53,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-20 05:40:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 667. [2022-07-20 05:40:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 532 states have (on average 1.306390977443609) internal successors, (695), 601 states have internal predecessors, (695), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-20 05:40:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 799 transitions. [2022-07-20 05:40:53,234 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 799 transitions. Word has length 122 [2022-07-20 05:40:53,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:53,235 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 799 transitions. [2022-07-20 05:40:53,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 05:40:53,235 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 799 transitions. [2022-07-20 05:40:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-20 05:40:53,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:53,236 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:53,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-20 05:40:53,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 05:40:53,455 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:53,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1960959122, now seen corresponding path program 1 times [2022-07-20 05:40:53,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:53,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164793194] [2022-07-20 05:40:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:53,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:53,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:53,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848214853] [2022-07-20 05:40:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:53,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:53,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:53,485 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) [2022-07-20 05:40:53,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 05:40:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:53,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:40:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:40:53,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:40:53,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:53,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164793194] [2022-07-20 05:40:53,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:53,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848214853] [2022-07-20 05:40:53,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848214853] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:40:53,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:40:53,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:40:53,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959460594] [2022-07-20 05:40:53,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:40:53,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:40:53,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:40:53,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:40:53,950 INFO L87 Difference]: Start difference. First operand 667 states and 799 transitions. Second operand has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:54,051 INFO L93 Difference]: Finished difference Result 670 states and 803 transitions. [2022-07-20 05:40:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:40:54,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 123 [2022-07-20 05:40:54,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:54,053 INFO L225 Difference]: With dead ends: 670 [2022-07-20 05:40:54,054 INFO L226 Difference]: Without dead ends: 670 [2022-07-20 05:40:54,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:40:54,055 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 102 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:54,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 511 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:40:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-07-20 05:40:54,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 666. [2022-07-20 05:40:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 532 states have (on average 1.3045112781954886) internal successors, (694), 600 states have internal predecessors, (694), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-20 05:40:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 798 transitions. [2022-07-20 05:40:54,065 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 798 transitions. Word has length 123 [2022-07-20 05:40:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:54,066 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 798 transitions. [2022-07-20 05:40:54,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 798 transitions. [2022-07-20 05:40:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-20 05:40:54,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:54,067 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:54,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:54,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:54,287 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:54,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:54,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1960959121, now seen corresponding path program 1 times [2022-07-20 05:40:54,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:54,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130934069] [2022-07-20 05:40:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:54,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:54,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:54,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900868019] [2022-07-20 05:40:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:54,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:54,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:54,326 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) [2022-07-20 05:40:54,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 05:40:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:55,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-20 05:40:55,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:55,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-20 05:40:55,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:40:55,754 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:55,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:55,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:40:56,162 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:56,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:56,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:40:56,522 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:40:56,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-07-20 05:40:56,552 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-20 05:40:56,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-20 05:40:56,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:56,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:40:56,775 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-20 05:40:56,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-07-20 05:40:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 242 proven. 300 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-20 05:40:56,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:57,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:57,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130934069] [2022-07-20 05:40:57,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:57,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900868019] [2022-07-20 05:40:57,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900868019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:57,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:57,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-07-20 05:40:57,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839851377] [2022-07-20 05:40:57,066 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:57,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 05:40:57,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:57,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 05:40:57,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:40:57,067 INFO L87 Difference]: Start difference. First operand 666 states and 798 transitions. Second operand has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:40:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:58,739 INFO L93 Difference]: Finished difference Result 868 states and 1043 transitions. [2022-07-20 05:40:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 05:40:58,739 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 123 [2022-07-20 05:40:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:58,742 INFO L225 Difference]: With dead ends: 868 [2022-07-20 05:40:58,742 INFO L226 Difference]: Without dead ends: 868 [2022-07-20 05:40:58,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 05:40:58,743 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 189 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 781 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:58,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 762 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2272 Invalid, 0 Unknown, 781 Unchecked, 1.4s Time] [2022-07-20 05:40:58,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-07-20 05:40:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 674. [2022-07-20 05:40:58,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 540 states have (on average 1.3055555555555556) internal successors, (705), 608 states have internal predecessors, (705), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-20 05:40:58,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 809 transitions. [2022-07-20 05:40:58,754 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 809 transitions. Word has length 123 [2022-07-20 05:40:58,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:58,754 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 809 transitions. [2022-07-20 05:40:58,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.967741935483871) internal successors, (92), 29 states have internal predecessors, (92), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:40:58,755 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 809 transitions. [2022-07-20 05:40:58,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-20 05:40:58,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:58,756 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:58,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:58,971 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,SelfDestructingSolverStorable30 [2022-07-20 05:40:58,971 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:58,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1008929263, now seen corresponding path program 1 times [2022-07-20 05:40:58,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:58,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698313014] [2022-07-20 05:40:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:58,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:58,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:58,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751964784] [2022-07-20 05:40:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:58,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:58,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:58,998 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) [2022-07-20 05:40:58,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 05:40:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:59,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:40:59,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:40:59,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:40:59,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:59,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698313014] [2022-07-20 05:40:59,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:59,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751964784] [2022-07-20 05:40:59,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751964784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:40:59,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:40:59,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:40:59,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945959477] [2022-07-20 05:40:59,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:40:59,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:40:59,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:59,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:40:59,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:59,432 INFO L87 Difference]: Start difference. First operand 674 states and 809 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:40:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:59,512 INFO L93 Difference]: Finished difference Result 675 states and 811 transitions. [2022-07-20 05:40:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:40:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2022-07-20 05:40:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:59,515 INFO L225 Difference]: With dead ends: 675 [2022-07-20 05:40:59,515 INFO L226 Difference]: Without dead ends: 675 [2022-07-20 05:40:59,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:59,516 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 25 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:59,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 386 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:40:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-07-20 05:40:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 673. [2022-07-20 05:40:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 540 states have (on average 1.3037037037037038) internal successors, (704), 607 states have internal predecessors, (704), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-20 05:40:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 808 transitions. [2022-07-20 05:40:59,526 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 808 transitions. Word has length 125 [2022-07-20 05:40:59,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:59,527 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 808 transitions. [2022-07-20 05:40:59,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:40:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 808 transitions. [2022-07-20 05:40:59,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-20 05:40:59,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:59,528 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:59,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:59,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:59,747 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:40:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:59,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1008929264, now seen corresponding path program 1 times [2022-07-20 05:40:59,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:59,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445288356] [2022-07-20 05:40:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:59,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:59,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:59,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979332421] [2022-07-20 05:40:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:59,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:59,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:59,777 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) [2022-07-20 05:40:59,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 05:41:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:00,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:41:00,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:00,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:00,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:00,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445288356] [2022-07-20 05:41:00,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:00,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979332421] [2022-07-20 05:41:00,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979332421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:00,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:00,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:41:00,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88964830] [2022-07-20 05:41:00,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:00,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:41:00,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:00,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:41:00,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:41:00,243 INFO L87 Difference]: Start difference. First operand 673 states and 808 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:00,359 INFO L93 Difference]: Finished difference Result 674 states and 810 transitions. [2022-07-20 05:41:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:41:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2022-07-20 05:41:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:00,363 INFO L225 Difference]: With dead ends: 674 [2022-07-20 05:41:00,363 INFO L226 Difference]: Without dead ends: 674 [2022-07-20 05:41:00,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:41:00,363 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 46 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:00,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 369 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:41:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-07-20 05:41:00,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2022-07-20 05:41:00,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 540 states have (on average 1.3018518518518518) internal successors, (703), 606 states have internal predecessors, (703), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-20 05:41:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 807 transitions. [2022-07-20 05:41:00,373 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 807 transitions. Word has length 125 [2022-07-20 05:41:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:00,374 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 807 transitions. [2022-07-20 05:41:00,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 807 transitions. [2022-07-20 05:41:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-20 05:41:00,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:00,375 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:00,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:00,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:00,591 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:00,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:00,592 INFO L85 PathProgramCache]: Analyzing trace with hash -20549672, now seen corresponding path program 1 times [2022-07-20 05:41:00,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:00,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887412113] [2022-07-20 05:41:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:00,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:00,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:00,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236381484] [2022-07-20 05:41:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:00,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:00,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:00,618 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) [2022-07-20 05:41:00,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 05:41:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:01,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 133 conjunts are in the unsatisfiable core [2022-07-20 05:41:01,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:01,275 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:41:01,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:41:01,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:41:01,438 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:41:01,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-07-20 05:41:01,467 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-20 05:41:01,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-20 05:41:01,709 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:41:01,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-07-20 05:41:01,741 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-20 05:41:01,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-07-20 05:41:01,970 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:41:01,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:41:01,997 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-20 05:41:01,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 42 [2022-07-20 05:41:02,362 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:41:02,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 05:41:02,403 INFO L356 Elim1Store]: treesize reduction 34, result has 54.1 percent of original size [2022-07-20 05:41:02,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 77 [2022-07-20 05:41:02,918 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:41:02,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 25 [2022-07-20 05:41:02,993 INFO L356 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2022-07-20 05:41:02,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 81 treesize of output 161 [2022-07-20 05:41:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 32 proven. 466 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-20 05:41:03,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:03,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:03,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887412113] [2022-07-20 05:41:03,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:03,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236381484] [2022-07-20 05:41:03,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236381484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:41:03,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:41:03,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-07-20 05:41:03,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836360587] [2022-07-20 05:41:03,976 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:03,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 05:41:03,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:03,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 05:41:03,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 05:41:03,978 INFO L87 Difference]: Start difference. First operand 672 states and 807 transitions. Second operand has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:41:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:04,242 INFO L93 Difference]: Finished difference Result 780 states and 929 transitions. [2022-07-20 05:41:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 05:41:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 129 [2022-07-20 05:41:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:04,245 INFO L225 Difference]: With dead ends: 780 [2022-07-20 05:41:04,245 INFO L226 Difference]: Without dead ends: 780 [2022-07-20 05:41:04,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 05:41:04,246 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 61 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1777 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:04,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1780 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 1777 Unchecked, 0.1s Time] [2022-07-20 05:41:04,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-07-20 05:41:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 773. [2022-07-20 05:41:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 631 states have (on average 1.2725832012678289) internal successors, (803), 697 states have internal predecessors, (803), 58 states have call successors, (58), 17 states have call predecessors, (58), 17 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-07-20 05:41:04,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 919 transitions. [2022-07-20 05:41:04,256 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 919 transitions. Word has length 129 [2022-07-20 05:41:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:04,257 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 919 transitions. [2022-07-20 05:41:04,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:41:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 919 transitions. [2022-07-20 05:41:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-20 05:41:04,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:04,258 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:04,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:04,483 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,SelfDestructingSolverStorable33 [2022-07-20 05:41:04,484 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:04,484 INFO L85 PathProgramCache]: Analyzing trace with hash -20549673, now seen corresponding path program 1 times [2022-07-20 05:41:04,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:04,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753475295] [2022-07-20 05:41:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:04,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:04,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:04,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824022149] [2022-07-20 05:41:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:04,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:04,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:04,510 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) [2022-07-20 05:41:04,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 05:41:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:05,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 05:41:05,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:05,120 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:41:05,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:41:05,186 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:41:05,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:41:05,247 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:41:05,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:41:05,307 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:41:05,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:41:05,370 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:41:05,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:41:05,447 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:41:05,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:41:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:05,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:05,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:05,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753475295] [2022-07-20 05:41:05,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:05,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824022149] [2022-07-20 05:41:05,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824022149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:05,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:05,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:41:05,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070673035] [2022-07-20 05:41:05,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:05,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:41:05,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:05,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:41:05,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:41:05,532 INFO L87 Difference]: Start difference. First operand 773 states and 919 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:05,814 INFO L93 Difference]: Finished difference Result 1401 states and 1682 transitions. [2022-07-20 05:41:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:41:05,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 129 [2022-07-20 05:41:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:05,819 INFO L225 Difference]: With dead ends: 1401 [2022-07-20 05:41:05,819 INFO L226 Difference]: Without dead ends: 1401 [2022-07-20 05:41:05,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:41:05,820 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 162 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:05,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 974 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 370 Invalid, 0 Unknown, 258 Unchecked, 0.2s Time] [2022-07-20 05:41:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-07-20 05:41:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1251. [2022-07-20 05:41:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1056 states have (on average 1.2490530303030303) internal successors, (1319), 1122 states have internal predecessors, (1319), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-20 05:41:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1517 transitions. [2022-07-20 05:41:05,838 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1517 transitions. Word has length 129 [2022-07-20 05:41:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:05,838 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1517 transitions. [2022-07-20 05:41:05,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1517 transitions. [2022-07-20 05:41:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-20 05:41:05,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:05,839 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:05,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:06,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-20 05:41:06,055 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:06,056 INFO L85 PathProgramCache]: Analyzing trace with hash -637039764, now seen corresponding path program 1 times [2022-07-20 05:41:06,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:06,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432930460] [2022-07-20 05:41:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:06,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:06,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:06,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415051118] [2022-07-20 05:41:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:06,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:06,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:06,083 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:06,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 05:41:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:06,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:41:06,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:06,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:06,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:06,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432930460] [2022-07-20 05:41:06,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:06,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415051118] [2022-07-20 05:41:06,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415051118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:06,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:06,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:41:06,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358339931] [2022-07-20 05:41:06,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:06,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:41:06,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:06,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:41:06,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:41:06,643 INFO L87 Difference]: Start difference. First operand 1251 states and 1517 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:06,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:06,748 INFO L93 Difference]: Finished difference Result 1250 states and 1515 transitions. [2022-07-20 05:41:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:41:06,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 130 [2022-07-20 05:41:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:06,755 INFO L225 Difference]: With dead ends: 1250 [2022-07-20 05:41:06,755 INFO L226 Difference]: Without dead ends: 1250 [2022-07-20 05:41:06,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:41:06,756 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 76 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:06,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 510 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:41:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-07-20 05:41:06,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2022-07-20 05:41:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1056 states have (on average 1.2471590909090908) internal successors, (1317), 1121 states have internal predecessors, (1317), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-20 05:41:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1515 transitions. [2022-07-20 05:41:06,772 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1515 transitions. Word has length 130 [2022-07-20 05:41:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:06,772 INFO L495 AbstractCegarLoop]: Abstraction has 1250 states and 1515 transitions. [2022-07-20 05:41:06,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1515 transitions. [2022-07-20 05:41:06,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-20 05:41:06,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:06,774 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:06,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:06,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-20 05:41:06,995 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:06,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash -637039763, now seen corresponding path program 1 times [2022-07-20 05:41:06,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:06,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760042445] [2022-07-20 05:41:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:06,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:07,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:07,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095689043] [2022-07-20 05:41:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:07,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:07,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:07,042 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:07,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-20 05:41:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:07,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 05:41:07,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-20 05:41:07,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:07,860 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:41:07,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-20 05:41:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-20 05:41:08,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:08,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760042445] [2022-07-20 05:41:08,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:08,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095689043] [2022-07-20 05:41:08,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095689043] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:41:08,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:41:08,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-20 05:41:08,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107863692] [2022-07-20 05:41:08,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:08,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:41:08,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:08,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:41:08,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:41:08,243 INFO L87 Difference]: Start difference. First operand 1250 states and 1515 transitions. Second operand has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-20 05:41:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:08,450 INFO L93 Difference]: Finished difference Result 1249 states and 1513 transitions. [2022-07-20 05:41:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:41:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2022-07-20 05:41:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:08,455 INFO L225 Difference]: With dead ends: 1249 [2022-07-20 05:41:08,455 INFO L226 Difference]: Without dead ends: 1249 [2022-07-20 05:41:08,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:41:08,456 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 290 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:08,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 2092 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:41:08,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-07-20 05:41:08,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1249. [2022-07-20 05:41:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1056 states have (on average 1.2452651515151516) internal successors, (1315), 1120 states have internal predecessors, (1315), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-20 05:41:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1513 transitions. [2022-07-20 05:41:08,472 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1513 transitions. Word has length 130 [2022-07-20 05:41:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:08,472 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1513 transitions. [2022-07-20 05:41:08,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-20 05:41:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1513 transitions. [2022-07-20 05:41:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-20 05:41:08,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:08,474 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:08,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:08,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:08,687 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1985113390, now seen corresponding path program 1 times [2022-07-20 05:41:08,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:08,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174019250] [2022-07-20 05:41:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:08,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:08,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953284944] [2022-07-20 05:41:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:08,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:08,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:08,726 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:08,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-20 05:41:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:09,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:41:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:09,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:09,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:09,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174019250] [2022-07-20 05:41:09,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:09,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953284944] [2022-07-20 05:41:09,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953284944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:09,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:09,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:41:09,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764976051] [2022-07-20 05:41:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:09,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:41:09,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:41:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:41:09,260 INFO L87 Difference]: Start difference. First operand 1249 states and 1513 transitions. Second operand has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:09,377 INFO L93 Difference]: Finished difference Result 1248 states and 1511 transitions. [2022-07-20 05:41:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:41:09,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 132 [2022-07-20 05:41:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:09,381 INFO L225 Difference]: With dead ends: 1248 [2022-07-20 05:41:09,381 INFO L226 Difference]: Without dead ends: 1248 [2022-07-20 05:41:09,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:41:09,382 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 31 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:09,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 375 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:41:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-07-20 05:41:09,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2022-07-20 05:41:09,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1056 states have (on average 1.2433712121212122) internal successors, (1313), 1119 states have internal predecessors, (1313), 99 states have call successors, (99), 29 states have call predecessors, (99), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-07-20 05:41:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1511 transitions. [2022-07-20 05:41:09,399 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1511 transitions. Word has length 132 [2022-07-20 05:41:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:09,400 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 1511 transitions. [2022-07-20 05:41:09,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1511 transitions. [2022-07-20 05:41:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-20 05:41:09,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:09,402 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:09,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:09,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-20 05:41:09,625 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:09,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:09,625 INFO L85 PathProgramCache]: Analyzing trace with hash 22933, now seen corresponding path program 1 times [2022-07-20 05:41:09,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:09,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116798279] [2022-07-20 05:41:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:09,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:09,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:09,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151278987] [2022-07-20 05:41:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:09,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:09,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:09,656 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:09,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-20 05:41:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:10,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:41:10,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:10,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:10,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:10,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116798279] [2022-07-20 05:41:10,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:10,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151278987] [2022-07-20 05:41:10,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151278987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:10,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:10,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:41:10,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683143802] [2022-07-20 05:41:10,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:10,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:41:10,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:10,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:41:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:41:10,405 INFO L87 Difference]: Start difference. First operand 1248 states and 1511 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:10,610 INFO L93 Difference]: Finished difference Result 1361 states and 1643 transitions. [2022-07-20 05:41:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:41:10,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2022-07-20 05:41:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:10,614 INFO L225 Difference]: With dead ends: 1361 [2022-07-20 05:41:10,614 INFO L226 Difference]: Without dead ends: 1361 [2022-07-20 05:41:10,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:41:10,615 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 599 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:10,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 327 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:41:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-07-20 05:41:10,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1295. [2022-07-20 05:41:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1105 states have (on average 1.2633484162895927) internal successors, (1396), 1161 states have internal predecessors, (1396), 99 states have call successors, (99), 29 states have call predecessors, (99), 30 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-20 05:41:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1599 transitions. [2022-07-20 05:41:10,632 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1599 transitions. Word has length 136 [2022-07-20 05:41:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:10,633 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 1599 transitions. [2022-07-20 05:41:10,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1599 transitions. [2022-07-20 05:41:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-20 05:41:10,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:10,634 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:10,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-20 05:41:10,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-20 05:41:10,859 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:10,860 INFO L85 PathProgramCache]: Analyzing trace with hash 22934, now seen corresponding path program 1 times [2022-07-20 05:41:10,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:10,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084880579] [2022-07-20 05:41:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:10,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:10,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297045781] [2022-07-20 05:41:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:10,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:10,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:10,905 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:10,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-20 05:41:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:11,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 05:41:11,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:11,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:11,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:11,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084880579] [2022-07-20 05:41:11,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:11,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297045781] [2022-07-20 05:41:11,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297045781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:11,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:11,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:41:11,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519563371] [2022-07-20 05:41:11,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:11,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:41:11,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:11,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:41:11,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:41:11,861 INFO L87 Difference]: Start difference. First operand 1295 states and 1599 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:12,005 INFO L93 Difference]: Finished difference Result 1290 states and 1589 transitions. [2022-07-20 05:41:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:41:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2022-07-20 05:41:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:12,009 INFO L225 Difference]: With dead ends: 1290 [2022-07-20 05:41:12,009 INFO L226 Difference]: Without dead ends: 1290 [2022-07-20 05:41:12,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:41:12,009 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 250 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:12,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 328 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:41:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-07-20 05:41:12,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1289. [2022-07-20 05:41:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1105 states have (on average 1.253393665158371) internal successors, (1385), 1155 states have internal predecessors, (1385), 99 states have call successors, (99), 29 states have call predecessors, (99), 30 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-20 05:41:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1588 transitions. [2022-07-20 05:41:12,023 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1588 transitions. Word has length 136 [2022-07-20 05:41:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:12,023 INFO L495 AbstractCegarLoop]: Abstraction has 1289 states and 1588 transitions. [2022-07-20 05:41:12,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1588 transitions. [2022-07-20 05:41:12,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-20 05:41:12,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:12,025 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:12,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-20 05:41:12,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-20 05:41:12,234 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting l0_destroyErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:12,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:12,234 INFO L85 PathProgramCache]: Analyzing trace with hash -283985079, now seen corresponding path program 1 times [2022-07-20 05:41:12,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:12,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929615848] [2022-07-20 05:41:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:12,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:12,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:12,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188672114] [2022-07-20 05:41:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:12,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:12,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:12,263 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:12,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-20 05:41:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:12,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:41:12,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:12,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:12,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929615848] [2022-07-20 05:41:12,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188672114] [2022-07-20 05:41:12,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188672114] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:12,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:12,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:41:12,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835691422] [2022-07-20 05:41:12,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:12,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:41:12,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:12,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:41:12,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:41:12,850 INFO L87 Difference]: Start difference. First operand 1289 states and 1588 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:12,891 INFO L93 Difference]: Finished difference Result 1429 states and 1770 transitions. [2022-07-20 05:41:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:41:12,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 140 [2022-07-20 05:41:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:12,895 INFO L225 Difference]: With dead ends: 1429 [2022-07-20 05:41:12,896 INFO L226 Difference]: Without dead ends: 1429 [2022-07-20 05:41:12,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:41:12,896 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 215 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:12,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 671 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:41:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2022-07-20 05:41:12,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1394. [2022-07-20 05:41:12,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1208 states have (on average 1.2971854304635762) internal successors, (1567), 1259 states have internal predecessors, (1567), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-20 05:41:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1770 transitions. [2022-07-20 05:41:12,918 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1770 transitions. Word has length 140 [2022-07-20 05:41:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:12,918 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 1770 transitions. [2022-07-20 05:41:12,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1770 transitions. [2022-07-20 05:41:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-20 05:41:12,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:12,920 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:12,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:13,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-07-20 05:41:13,135 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:13,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:13,136 INFO L85 PathProgramCache]: Analyzing trace with hash -283990552, now seen corresponding path program 1 times [2022-07-20 05:41:13,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:13,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711083350] [2022-07-20 05:41:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:13,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:13,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:13,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580648019] [2022-07-20 05:41:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:13,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:13,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:13,168 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:13,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-20 05:41:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:13,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 05:41:13,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:14,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:41:14,196 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 17 treesize of output 9 [2022-07-20 05:41:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:14,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:14,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:14,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711083350] [2022-07-20 05:41:14,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:14,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580648019] [2022-07-20 05:41:14,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580648019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:14,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:14,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:41:14,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068886065] [2022-07-20 05:41:14,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:14,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:41:14,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:14,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:41:14,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:41:14,215 INFO L87 Difference]: Start difference. First operand 1394 states and 1770 transitions. Second operand has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:14,707 INFO L93 Difference]: Finished difference Result 1704 states and 2140 transitions. [2022-07-20 05:41:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:41:14,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 140 [2022-07-20 05:41:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:14,713 INFO L225 Difference]: With dead ends: 1704 [2022-07-20 05:41:14,713 INFO L226 Difference]: Without dead ends: 1704 [2022-07-20 05:41:14,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:41:14,714 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 804 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:14,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 1045 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:41:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-07-20 05:41:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1466. [2022-07-20 05:41:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1281 states have (on average 1.3224043715846994) internal successors, (1694), 1331 states have internal predecessors, (1694), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-20 05:41:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 1897 transitions. [2022-07-20 05:41:14,733 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 1897 transitions. Word has length 140 [2022-07-20 05:41:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:14,733 INFO L495 AbstractCegarLoop]: Abstraction has 1466 states and 1897 transitions. [2022-07-20 05:41:14,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 1897 transitions. [2022-07-20 05:41:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-20 05:41:14,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:14,735 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:14,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-20 05:41:14,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:14,944 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash -283990551, now seen corresponding path program 1 times [2022-07-20 05:41:14,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:14,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682633865] [2022-07-20 05:41:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:14,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:14,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:14,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098718127] [2022-07-20 05:41:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:14,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:14,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:14,974 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:14,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-20 05:41:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:15,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 05:41:15,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:16,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:41:16,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:41:16,385 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 23 treesize of output 15 [2022-07-20 05:41:16,387 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 26 treesize of output 14 [2022-07-20 05:41:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:16,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:16,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:16,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682633865] [2022-07-20 05:41:16,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:16,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098718127] [2022-07-20 05:41:16,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098718127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:16,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:16,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 05:41:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137247837] [2022-07-20 05:41:16,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:16,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:41:16,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:41:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:41:16,457 INFO L87 Difference]: Start difference. First operand 1466 states and 1897 transitions. Second operand has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:17,089 INFO L93 Difference]: Finished difference Result 1627 states and 2060 transitions. [2022-07-20 05:41:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:41:17,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 140 [2022-07-20 05:41:17,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:17,095 INFO L225 Difference]: With dead ends: 1627 [2022-07-20 05:41:17,095 INFO L226 Difference]: Without dead ends: 1627 [2022-07-20 05:41:17,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:41:17,096 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 1163 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:17,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 1130 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 05:41:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2022-07-20 05:41:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1553. [2022-07-20 05:41:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1368 states have (on average 1.3523391812865497) internal successors, (1850), 1418 states have internal predecessors, (1850), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-20 05:41:17,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2053 transitions. [2022-07-20 05:41:17,115 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2053 transitions. Word has length 140 [2022-07-20 05:41:17,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:17,116 INFO L495 AbstractCegarLoop]: Abstraction has 1553 states and 2053 transitions. [2022-07-20 05:41:17,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:17,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2053 transitions. [2022-07-20 05:41:17,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 05:41:17,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:17,117 INFO L195 NwaCegarLoop]: trace histogram [36, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:17,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:17,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:17,343 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:17,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1734213140, now seen corresponding path program 1 times [2022-07-20 05:41:17,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:17,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064376032] [2022-07-20 05:41:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:17,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:17,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:17,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956569856] [2022-07-20 05:41:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:17,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:17,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:17,377 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:17,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-20 05:41:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:18,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 05:41:18,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:18,140 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:41:18,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:41:18,200 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:41:18,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-20 05:41:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-20 05:41:18,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:18,410 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 05:41:18,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-20 05:41:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-20 05:41:18,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:18,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064376032] [2022-07-20 05:41:18,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:18,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956569856] [2022-07-20 05:41:18,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956569856] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:41:18,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:41:18,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-07-20 05:41:18,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498727322] [2022-07-20 05:41:18,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:18,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:41:18,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:18,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:41:18,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:41:18,446 INFO L87 Difference]: Start difference. First operand 1553 states and 2053 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-20 05:41:18,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:18,660 INFO L93 Difference]: Finished difference Result 1655 states and 2163 transitions. [2022-07-20 05:41:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:41:18,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 142 [2022-07-20 05:41:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:18,665 INFO L225 Difference]: With dead ends: 1655 [2022-07-20 05:41:18,665 INFO L226 Difference]: Without dead ends: 1655 [2022-07-20 05:41:18,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 267 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:41:18,666 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 316 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:18,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1135 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 324 Invalid, 0 Unknown, 262 Unchecked, 0.2s Time] [2022-07-20 05:41:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-07-20 05:41:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1552. [2022-07-20 05:41:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1368 states have (on average 1.340643274853801) internal successors, (1834), 1417 states have internal predecessors, (1834), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-20 05:41:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2037 transitions. [2022-07-20 05:41:18,686 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2037 transitions. Word has length 142 [2022-07-20 05:41:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:18,686 INFO L495 AbstractCegarLoop]: Abstraction has 1552 states and 2037 transitions. [2022-07-20 05:41:18,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-20 05:41:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2037 transitions. [2022-07-20 05:41:18,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 05:41:18,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:18,688 INFO L195 NwaCegarLoop]: trace histogram [36, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:18,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-20 05:41:18,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-20 05:41:18,915 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1734213139, now seen corresponding path program 1 times [2022-07-20 05:41:18,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681823301] [2022-07-20 05:41:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:18,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:18,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:18,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113950788] [2022-07-20 05:41:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:18,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:18,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:18,959 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:18,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-20 05:41:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:19,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-20 05:41:19,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:20,068 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:41:20,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-07-20 05:41:20,086 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:41:20,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:41:20,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:41:20,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:41:20,227 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:41:20,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:41:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 503 proven. 196 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2022-07-20 05:41:20,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:20,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:20,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681823301] [2022-07-20 05:41:20,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:20,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113950788] [2022-07-20 05:41:20,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113950788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:41:20,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:41:20,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-20 05:41:20,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148387040] [2022-07-20 05:41:20,403 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:20,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:41:20,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:20,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:41:20,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:41:20,404 INFO L87 Difference]: Start difference. First operand 1552 states and 2037 transitions. Second operand has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-20 05:41:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:21,472 INFO L93 Difference]: Finished difference Result 1852 states and 2404 transitions. [2022-07-20 05:41:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:41:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 142 [2022-07-20 05:41:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:21,477 INFO L225 Difference]: With dead ends: 1852 [2022-07-20 05:41:21,477 INFO L226 Difference]: Without dead ends: 1852 [2022-07-20 05:41:21,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 05:41:21,478 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 482 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 3358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1564 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:21,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1598 Invalid, 3358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1678 Invalid, 0 Unknown, 1564 Unchecked, 0.8s Time] [2022-07-20 05:41:21,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-07-20 05:41:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1551. [2022-07-20 05:41:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1368 states have (on average 1.3289473684210527) internal successors, (1818), 1416 states have internal predecessors, (1818), 99 states have call successors, (99), 30 states have call predecessors, (99), 32 states have return successors, (104), 104 states have call predecessors, (104), 99 states have call successors, (104) [2022-07-20 05:41:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2021 transitions. [2022-07-20 05:41:21,518 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2021 transitions. Word has length 142 [2022-07-20 05:41:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:21,518 INFO L495 AbstractCegarLoop]: Abstraction has 1551 states and 2021 transitions. [2022-07-20 05:41:21,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-20 05:41:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2021 transitions. [2022-07-20 05:41:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-20 05:41:21,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:21,520 INFO L195 NwaCegarLoop]: trace histogram [26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:21,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:21,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-20 05:41:21,739 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2022-07-20 05:41:21,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:21,740 INFO L85 PathProgramCache]: Analyzing trace with hash 723198554, now seen corresponding path program 1 times [2022-07-20 05:41:21,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:21,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035189071] [2022-07-20 05:41:21,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:21,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:21,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:21,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76834323] [2022-07-20 05:41:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:21,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:21,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:21,770 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:21,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-20 05:41:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:22,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-20 05:41:22,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:22,617 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:41:22,617 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 [2022-07-20 05:41:23,299 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 [2022-07-20 05:41:23,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:41:23,371 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 23 treesize of output 22 [2022-07-20 05:41:23,392 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 21 treesize of output 20 [2022-07-20 05:41:23,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:41:23,437 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 [2022-07-20 05:41:23,504 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:41:23,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2022-07-20 05:41:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-07-20 05:41:23,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:23,615 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 84 treesize of output 80 [2022-07-20 05:41:37,837 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 34 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 05:42:04,687 INFO L356 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2022-07-20 05:42:04,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 16676 treesize of output 15768