./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/tree_max.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 05:10:47,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 05:10:47,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 05:10:47,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 05:10:47,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 05:10:47,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 05:10:47,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 05:10:47,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 05:10:47,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 05:10:47,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 05:10:47,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 05:10:47,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 05:10:47,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 05:10:47,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 05:10:47,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 05:10:47,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 05:10:47,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 05:10:47,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 05:10:47,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 05:10:47,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 05:10:47,545 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 05:10:47,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 05:10:47,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 05:10:47,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 05:10:47,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 05:10:47,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 05:10:47,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 05:10:47,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 05:10:47,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 05:10:47,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 05:10:47,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 05:10:47,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 05:10:47,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 05:10:47,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 05:10:47,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 05:10:47,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 05:10:47,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 05:10:47,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 05:10:47,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 05:10:47,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 05:10:47,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 05:10:47,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 05:10:47,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 05:10:47,591 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 05:10:47,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 05:10:47,592 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 05:10:47,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 05:10:47,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 05:10:47,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 05:10:47,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 05:10:47,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 05:10:47,594 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 05:10:47,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 05:10:47,595 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 05:10:47,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 05:10:47,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 05:10:47,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 05:10:47,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 05:10:47,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 05:10:47,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 05:10:47,596 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 05:10:47,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 05:10:47,597 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 05:10:47,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 05:10:47,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 05:10:47,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 05:10:47,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 05:10:47,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:10:47,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 05:10:47,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 05:10:47,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 05:10:47,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 05:10:47,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 05:10:47,599 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 05:10:47,599 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 05:10:47,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 05:10:47,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2022-07-21 05:10:47,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 05:10:47,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 05:10:47,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 05:10:47,878 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 05:10:47,878 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 05:10:47,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2022-07-21 05:10:47,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e352acf1/e36648347d80484eb23a595d1dc25ba4/FLAGdfea11d97 [2022-07-21 05:10:48,243 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 05:10:48,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2022-07-21 05:10:48,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e352acf1/e36648347d80484eb23a595d1dc25ba4/FLAGdfea11d97 [2022-07-21 05:10:48,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e352acf1/e36648347d80484eb23a595d1dc25ba4 [2022-07-21 05:10:48,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 05:10:48,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 05:10:48,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 05:10:48,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 05:10:48,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 05:10:48,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75219d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48, skipping insertion in model container [2022-07-21 05:10:48,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 05:10:48,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 05:10:48,803 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-07-21 05:10:48,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:10:48,832 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 05:10:48,855 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-07-21 05:10:48,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:10:48,883 INFO L208 MainTranslator]: Completed translation [2022-07-21 05:10:48,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48 WrapperNode [2022-07-21 05:10:48,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 05:10:48,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 05:10:48,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 05:10:48,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 05:10:48,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,935 INFO L137 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 38 [2022-07-21 05:10:48,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 05:10:48,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 05:10:48,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 05:10:48,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 05:10:48,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 05:10:48,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 05:10:48,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 05:10:48,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 05:10:48,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48" (1/1) ... [2022-07-21 05:10:48,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:10:48,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:10:49,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 05:10:49,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 05:10:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 05:10:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 05:10:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-07-21 05:10:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-07-21 05:10:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-07-21 05:10:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-07-21 05:10:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 05:10:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-07-21 05:10:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-07-21 05:10:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 05:10:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 05:10:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 05:10:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 05:10:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 05:10:49,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 05:10:49,103 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 05:10:49,104 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 05:10:49,272 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 05:10:49,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 05:10:49,276 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 05:10:49,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:10:49 BoogieIcfgContainer [2022-07-21 05:10:49,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 05:10:49,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 05:10:49,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 05:10:49,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 05:10:49,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:10:48" (1/3) ... [2022-07-21 05:10:49,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569dab7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:10:49, skipping insertion in model container [2022-07-21 05:10:49,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:10:48" (2/3) ... [2022-07-21 05:10:49,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569dab7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:10:49, skipping insertion in model container [2022-07-21 05:10:49,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:10:49" (3/3) ... [2022-07-21 05:10:49,286 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.c [2022-07-21 05:10:49,304 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 05:10:49,304 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 05:10:49,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 05:10:49,345 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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@60129d6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3d9878e9 [2022-07-21 05:10:49,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 05:10:49,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 05:10:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 05:10:49,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:10:49,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:10:49,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:10:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:10:49,358 INFO L85 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2022-07-21 05:10:49,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:10:49,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870757300] [2022-07-21 05:10:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:10:49,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:10:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:49,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:49,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 05:10:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:10:49,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:10:49,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870757300] [2022-07-21 05:10:49,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870757300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:10:49,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:10:49,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 05:10:49,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681194133] [2022-07-21 05:10:49,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:10:49,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 05:10:49,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:10:49,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 05:10:49,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:10:49,672 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 05:10:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:10:49,902 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2022-07-21 05:10:49,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 05:10:49,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-21 05:10:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:10:49,909 INFO L225 Difference]: With dead ends: 74 [2022-07-21 05:10:49,909 INFO L226 Difference]: Without dead ends: 35 [2022-07-21 05:10:49,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-21 05:10:49,914 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:10:49,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 119 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:10:49,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-21 05:10:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-07-21 05:10:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 05:10:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-07-21 05:10:49,941 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2022-07-21 05:10:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:10:49,941 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-07-21 05:10:49,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 05:10:49,943 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-07-21 05:10:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 05:10:49,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:10:49,945 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:10:49,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 05:10:49,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:10:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:10:49,946 INFO L85 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2022-07-21 05:10:49,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:10:49,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789919830] [2022-07-21 05:10:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:10:49,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:10:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:10:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:10:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 05:10:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:10:50,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:10:50,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789919830] [2022-07-21 05:10:50,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789919830] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:10:50,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:10:50,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 05:10:50,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38821657] [2022-07-21 05:10:50,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:10:50,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 05:10:50,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:10:50,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 05:10:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:10:50,103 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 05:10:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:10:50,258 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-07-21 05:10:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 05:10:50,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-07-21 05:10:50,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:10:50,264 INFO L225 Difference]: With dead ends: 48 [2022-07-21 05:10:50,264 INFO L226 Difference]: Without dead ends: 37 [2022-07-21 05:10:50,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-21 05:10:50,265 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:10:50,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 108 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:10:50,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-21 05:10:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-21 05:10:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-21 05:10:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-07-21 05:10:50,277 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2022-07-21 05:10:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:10:50,277 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-07-21 05:10:50,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 05:10:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-07-21 05:10:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 05:10:50,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:10:50,279 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:10:50,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 05:10:50,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:10:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:10:50,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2022-07-21 05:10:50,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:10:50,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164778814] [2022-07-21 05:10:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:10:50,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:10:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:10:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:10:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 05:10:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:10:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:10:50,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:10:50,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164778814] [2022-07-21 05:10:50,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164778814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:10:50,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165690587] [2022-07-21 05:10:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:10:50,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:10:50,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:10:50,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:10:50,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 05:10:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:50,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 05:10:50,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:10:50,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:10:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 05:10:50,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:10:51,113 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-21 05:10:51,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 05:10:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:10:51,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165690587] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:10:51,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:10:51,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2022-07-21 05:10:51,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839958070] [2022-07-21 05:10:51,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:10:51,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 05:10:51,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:10:51,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 05:10:51,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-07-21 05:10:51,145 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-21 05:10:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:10:51,552 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-07-21 05:10:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 05:10:51,553 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2022-07-21 05:10:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:10:51,554 INFO L225 Difference]: With dead ends: 46 [2022-07-21 05:10:51,554 INFO L226 Difference]: Without dead ends: 44 [2022-07-21 05:10:51,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 05:10:51,556 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:10:51,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 164 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:10:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-21 05:10:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-07-21 05:10:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-21 05:10:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-07-21 05:10:51,561 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2022-07-21 05:10:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:10:51,562 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-07-21 05:10:51,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-21 05:10:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-07-21 05:10:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 05:10:51,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:10:51,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:10:51,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 05:10:51,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:10:51,764 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:10:51,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:10:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2022-07-21 05:10:51,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:10:51,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057251002] [2022-07-21 05:10:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:10:51,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:10:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:51,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:51,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:10:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:10:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:52,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 05:10:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:52,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:52,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:10:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 05:10:52,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:10:52,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057251002] [2022-07-21 05:10:52,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057251002] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:10:52,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638635123] [2022-07-21 05:10:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:10:52,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:10:52,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:10:52,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:10:52,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 05:10:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:52,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 05:10:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:10:52,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:10:52,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:10:52,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:10:52,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:10:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 05:10:52,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:00,812 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 05:11:06,875 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 05:11:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 05:11:06,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638635123] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:11:06,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:11:06,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 13] total 29 [2022-07-21 05:11:06,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99843778] [2022-07-21 05:11:06,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:11:06,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 05:11:06,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:06,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 05:11:06,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=732, Unknown=1, NotChecked=0, Total=812 [2022-07-21 05:11:06,945 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 05:11:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:07,799 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2022-07-21 05:11:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 05:11:07,800 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 47 [2022-07-21 05:11:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:07,801 INFO L225 Difference]: With dead ends: 76 [2022-07-21 05:11:07,801 INFO L226 Difference]: Without dead ends: 64 [2022-07-21 05:11:07,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=239, Invalid=1922, Unknown=1, NotChecked=0, Total=2162 [2022-07-21 05:11:07,804 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 101 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:07,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 335 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 914 Invalid, 0 Unknown, 160 Unchecked, 0.4s Time] [2022-07-21 05:11:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-21 05:11:07,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-07-21 05:11:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-21 05:11:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-07-21 05:11:07,812 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 47 [2022-07-21 05:11:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:07,815 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-07-21 05:11:07,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 05:11:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-07-21 05:11:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 05:11:07,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:07,832 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:07,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:08,053 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,SelfDestructingSolverStorable3 [2022-07-21 05:11:08,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2022-07-21 05:11:08,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:08,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55800167] [2022-07-21 05:11:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:08,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:08,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:08,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:08,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:08,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 05:11:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:08,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:08,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:11:08,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55800167] [2022-07-21 05:11:08,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55800167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129364598] [2022-07-21 05:11:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:08,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:08,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:08,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:11:08,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 05:11:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:08,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 05:11:08,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:08,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:11:08,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:11:08,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:11:08,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:11:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 05:11:08,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:16,804 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 05:11:22,877 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 05:11:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 05:11:22,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129364598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:11:22,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:11:22,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 28 [2022-07-21 05:11:22,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706545379] [2022-07-21 05:11:22,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:11:22,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 05:11:22,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:22,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 05:11:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=686, Unknown=1, NotChecked=0, Total=756 [2022-07-21 05:11:22,964 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-07-21 05:11:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:23,772 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2022-07-21 05:11:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 05:11:23,773 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 47 [2022-07-21 05:11:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:23,774 INFO L225 Difference]: With dead ends: 152 [2022-07-21 05:11:23,774 INFO L226 Difference]: Without dead ends: 90 [2022-07-21 05:11:23,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=212, Invalid=1949, Unknown=1, NotChecked=0, Total=2162 [2022-07-21 05:11:23,776 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 131 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:23,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 222 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 788 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2022-07-21 05:11:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-21 05:11:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-07-21 05:11:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (32), 15 states have call predecessors, (32), 10 states have call successors, (32) [2022-07-21 05:11:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2022-07-21 05:11:23,801 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 47 [2022-07-21 05:11:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:23,801 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2022-07-21 05:11:23,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-07-21 05:11:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2022-07-21 05:11:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 05:11:23,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:23,803 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:23,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:24,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:24,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:24,020 INFO L85 PathProgramCache]: Analyzing trace with hash -945278837, now seen corresponding path program 2 times [2022-07-21 05:11:24,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:24,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986519129] [2022-07-21 05:11:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:24,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:11:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 05:11:24,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:24,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986519129] [2022-07-21 05:11:24,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986519129] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:24,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269905738] [2022-07-21 05:11:24,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:11:24,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:24,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:24,644 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:11:24,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 05:11:24,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:11:24,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:11:24,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-21 05:11:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:25,289 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 25 treesize of output 17 [2022-07-21 05:11:25,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-21 05:11:25,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-21 05:11:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 05:11:25,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:25,946 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 05:11:25,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-07-21 05:11:26,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269905738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:26,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:11:26,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 47 [2022-07-21 05:11:26,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059800491] [2022-07-21 05:11:26,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:11:26,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 05:11:26,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:26,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 05:11:26,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3142, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 05:11:26,118 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-21 05:11:28,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:28,599 INFO L93 Difference]: Finished difference Result 163 states and 287 transitions. [2022-07-21 05:11:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 05:11:28,599 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 70 [2022-07-21 05:11:28,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:28,601 INFO L225 Difference]: With dead ends: 163 [2022-07-21 05:11:28,601 INFO L226 Difference]: Without dead ends: 161 [2022-07-21 05:11:28,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=546, Invalid=7110, Unknown=0, NotChecked=0, Total=7656 [2022-07-21 05:11:28,604 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 163 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:28,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 384 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 05:11:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-21 05:11:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2022-07-21 05:11:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 96 states have (on average 1.21875) internal successors, (117), 98 states have internal predecessors, (117), 20 states have call successors, (20), 11 states have call predecessors, (20), 17 states have return successors, (86), 24 states have call predecessors, (86), 12 states have call successors, (86) [2022-07-21 05:11:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 223 transitions. [2022-07-21 05:11:28,620 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 223 transitions. Word has length 70 [2022-07-21 05:11:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:28,620 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 223 transitions. [2022-07-21 05:11:28,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-21 05:11:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 223 transitions. [2022-07-21 05:11:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:11:28,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:28,623 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:28,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:28,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:28,861 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash -909256420, now seen corresponding path program 1 times [2022-07-21 05:11:28,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:28,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369135236] [2022-07-21 05:11:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:28,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:11:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 05:11:29,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:29,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369135236] [2022-07-21 05:11:29,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369135236] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:29,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433120826] [2022-07-21 05:11:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:29,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:29,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:29,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:11:29,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 05:11:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:29,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-21 05:11:29,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:30,164 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 25 treesize of output 17 [2022-07-21 05:11:30,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-21 05:11:30,280 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 [2022-07-21 05:11:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 05:11:30,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:30,919 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 05:11:30,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2022-07-21 05:11:31,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433120826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:31,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:11:31,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2022-07-21 05:11:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621237468] [2022-07-21 05:11:31,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:11:31,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 05:11:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 05:11:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3737, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 05:11:31,236 INFO L87 Difference]: Start difference. First operand 134 states and 223 transitions. Second operand has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-21 05:11:35,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:35,745 INFO L93 Difference]: Finished difference Result 335 states and 640 transitions. [2022-07-21 05:11:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-21 05:11:35,746 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 71 [2022-07-21 05:11:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:35,750 INFO L225 Difference]: With dead ends: 335 [2022-07-21 05:11:35,750 INFO L226 Difference]: Without dead ends: 223 [2022-07-21 05:11:35,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=874, Invalid=11558, Unknown=0, NotChecked=0, Total=12432 [2022-07-21 05:11:35,766 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 161 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 3769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:35,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 423 Invalid, 3769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3685 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 05:11:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-21 05:11:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 152. [2022-07-21 05:11:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 108 states have (on average 1.212962962962963) internal successors, (131), 114 states have internal predecessors, (131), 20 states have call successors, (20), 11 states have call predecessors, (20), 23 states have return successors, (122), 26 states have call predecessors, (122), 12 states have call successors, (122) [2022-07-21 05:11:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 273 transitions. [2022-07-21 05:11:35,796 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 273 transitions. Word has length 71 [2022-07-21 05:11:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:35,797 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 273 transitions. [2022-07-21 05:11:35,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-21 05:11:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 273 transitions. [2022-07-21 05:11:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:11:35,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:35,799 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:35,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:36,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:36,016 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:36,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1931785932, now seen corresponding path program 2 times [2022-07-21 05:11:36,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:36,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323958337] [2022-07-21 05:11:36,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:36,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:36,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:36,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:36,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:36,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:36,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:36,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:11:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:36,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:36,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:36,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:36,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 05:11:36,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:36,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323958337] [2022-07-21 05:11:36,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323958337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:36,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900285196] [2022-07-21 05:11:36,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:11:36,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:36,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:36,183 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:11:36,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 05:11:36,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:11:36,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:11:36,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 05:11:36,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 05:11:36,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 05:11:36,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900285196] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:11:36,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:11:36,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2022-07-21 05:11:36,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116913015] [2022-07-21 05:11:36,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:11:36,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 05:11:36,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:36,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 05:11:36,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-07-21 05:11:36,580 INFO L87 Difference]: Start difference. First operand 152 states and 273 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-21 05:11:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:37,521 INFO L93 Difference]: Finished difference Result 305 states and 646 transitions. [2022-07-21 05:11:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 05:11:37,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 71 [2022-07-21 05:11:37,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:37,524 INFO L225 Difference]: With dead ends: 305 [2022-07-21 05:11:37,524 INFO L226 Difference]: Without dead ends: 175 [2022-07-21 05:11:37,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 05:11:37,526 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 109 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:37,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 297 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:11:37,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-07-21 05:11:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 158. [2022-07-21 05:11:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 113 states have (on average 1.168141592920354) internal successors, (132), 118 states have internal predecessors, (132), 20 states have call successors, (20), 11 states have call predecessors, (20), 24 states have return successors, (129), 28 states have call predecessors, (129), 12 states have call successors, (129) [2022-07-21 05:11:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 281 transitions. [2022-07-21 05:11:37,554 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 281 transitions. Word has length 71 [2022-07-21 05:11:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:37,555 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 281 transitions. [2022-07-21 05:11:37,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-21 05:11:37,555 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 281 transitions. [2022-07-21 05:11:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 05:11:37,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:37,557 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:37,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:37,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:37,775 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1914561797, now seen corresponding path program 1 times [2022-07-21 05:11:37,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:37,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868587830] [2022-07-21 05:11:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:37,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:37,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:38,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:38,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:38,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:38,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:38,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:11:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:38,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:38,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:38,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:38,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 05:11:38,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:38,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868587830] [2022-07-21 05:11:38,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868587830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:38,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578667903] [2022-07-21 05:11:38,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:38,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:38,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:38,401 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:11:38,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 05:11:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-21 05:11:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:39,220 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 [2022-07-21 05:11:39,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 05:11:39,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:11:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 05:11:39,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:39,988 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 05:11:39,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-07-21 05:11:40,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578667903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:40,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:11:40,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 54 [2022-07-21 05:11:40,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027217959] [2022-07-21 05:11:40,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:11:40,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 05:11:40,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:40,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 05:11:40,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4625, Unknown=0, NotChecked=0, Total=4830 [2022-07-21 05:11:40,681 INFO L87 Difference]: Start difference. First operand 158 states and 281 transitions. Second operand has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-21 05:11:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:43,711 INFO L93 Difference]: Finished difference Result 191 states and 326 transitions. [2022-07-21 05:11:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 05:11:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 72 [2022-07-21 05:11:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:43,720 INFO L225 Difference]: With dead ends: 191 [2022-07-21 05:11:43,720 INFO L226 Difference]: Without dead ends: 189 [2022-07-21 05:11:43,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=739, Invalid=10181, Unknown=0, NotChecked=0, Total=10920 [2022-07-21 05:11:43,723 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 172 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:43,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 381 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 05:11:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-21 05:11:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 153. [2022-07-21 05:11:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 109 states have (on average 1.165137614678899) internal successors, (127), 114 states have internal predecessors, (127), 20 states have call successors, (20), 11 states have call predecessors, (20), 23 states have return successors, (123), 27 states have call predecessors, (123), 12 states have call successors, (123) [2022-07-21 05:11:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 270 transitions. [2022-07-21 05:11:43,734 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 270 transitions. Word has length 72 [2022-07-21 05:11:43,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:43,734 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 270 transitions. [2022-07-21 05:11:43,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-21 05:11:43,735 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 270 transitions. [2022-07-21 05:11:43,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 05:11:43,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:43,736 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:43,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:43,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:43,954 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:43,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:43,954 INFO L85 PathProgramCache]: Analyzing trace with hash 872853690, now seen corresponding path program 1 times [2022-07-21 05:11:43,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:43,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164003128] [2022-07-21 05:11:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:43,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:11:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 05:11:44,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164003128] [2022-07-21 05:11:44,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164003128] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594091616] [2022-07-21 05:11:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:44,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:44,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:44,448 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:11:44,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 05:11:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:44,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-21 05:11:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:44,973 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 [2022-07-21 05:11:44,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 05:11:45,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:11:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 05:11:45,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:45,335 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-21 05:11:45,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-21 05:11:45,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594091616] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:45,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:11:45,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 43 [2022-07-21 05:11:45,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042381626] [2022-07-21 05:11:45,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:11:45,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 05:11:45,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:45,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 05:11:45,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 05:11:45,462 INFO L87 Difference]: Start difference. First operand 153 states and 270 transitions. Second operand has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-21 05:11:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:46,697 INFO L93 Difference]: Finished difference Result 189 states and 309 transitions. [2022-07-21 05:11:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 05:11:46,697 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) Word has length 72 [2022-07-21 05:11:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:46,699 INFO L225 Difference]: With dead ends: 189 [2022-07-21 05:11:46,699 INFO L226 Difference]: Without dead ends: 187 [2022-07-21 05:11:46,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=361, Invalid=4469, Unknown=0, NotChecked=0, Total=4830 [2022-07-21 05:11:46,702 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 94 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:46,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 337 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 05:11:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-21 05:11:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2022-07-21 05:11:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 98 states have (on average 1.183673469387755) internal successors, (116), 99 states have internal predecessors, (116), 19 states have call successors, (19), 10 states have call predecessors, (19), 18 states have return successors, (93), 26 states have call predecessors, (93), 12 states have call successors, (93) [2022-07-21 05:11:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 228 transitions. [2022-07-21 05:11:46,715 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 228 transitions. Word has length 72 [2022-07-21 05:11:46,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:46,715 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 228 transitions. [2022-07-21 05:11:46,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-21 05:11:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 228 transitions. [2022-07-21 05:11:46,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 05:11:46,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:46,717 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:46,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:46,933 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,SelfDestructingSolverStorable9 [2022-07-21 05:11:46,933 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:46,934 INFO L85 PathProgramCache]: Analyzing trace with hash -666655302, now seen corresponding path program 2 times [2022-07-21 05:11:46,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:46,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761298853] [2022-07-21 05:11:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:46,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:47,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:47,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:47,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:47,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 05:11:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:47,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:47,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:47,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:47,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-21 05:11:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 05:11:47,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:47,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761298853] [2022-07-21 05:11:47,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761298853] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:47,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584498016] [2022-07-21 05:11:47,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:11:47,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:47,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:47,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:11:47,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 05:11:47,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:11:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:11:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-21 05:11:47,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:47,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:11:47,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:11:47,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 05:11:47,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 05:11:47,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:11:47,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:11:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-21 05:11:47,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-21 05:11:47,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584498016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:11:47,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:11:47,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 25 [2022-07-21 05:11:47,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660154438] [2022-07-21 05:11:47,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:11:47,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 05:11:47,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:47,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 05:11:47,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-07-21 05:11:47,818 INFO L87 Difference]: Start difference. First operand 136 states and 228 transitions. Second operand has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-21 05:11:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:48,045 INFO L93 Difference]: Finished difference Result 243 states and 415 transitions. [2022-07-21 05:11:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 05:11:48,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) Word has length 60 [2022-07-21 05:11:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:48,046 INFO L225 Difference]: With dead ends: 243 [2022-07-21 05:11:48,046 INFO L226 Difference]: Without dead ends: 141 [2022-07-21 05:11:48,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-07-21 05:11:48,047 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 26 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:48,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 482 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-07-21 05:11:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-21 05:11:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-07-21 05:11:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 102 states have internal predecessors, (119), 20 states have call successors, (20), 10 states have call predecessors, (20), 19 states have return successors, (99), 28 states have call predecessors, (99), 13 states have call successors, (99) [2022-07-21 05:11:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 238 transitions. [2022-07-21 05:11:48,057 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 238 transitions. Word has length 60 [2022-07-21 05:11:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:48,057 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 238 transitions. [2022-07-21 05:11:48,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-21 05:11:48,057 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 238 transitions. [2022-07-21 05:11:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 05:11:48,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:48,059 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:48,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:48,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:48,275 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:48,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1479239555, now seen corresponding path program 3 times [2022-07-21 05:11:48,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:48,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139639802] [2022-07-21 05:11:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:48,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 05:11:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:11:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-21 05:11:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-21 05:11:48,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:48,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139639802] [2022-07-21 05:11:48,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139639802] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:48,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248465783] [2022-07-21 05:11:48,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:11:48,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:48,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:48,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:11:48,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 05:11:48,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 05:11:48,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:11:48,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-21 05:11:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:48,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 05:11:48,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:11:49,028 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 [2022-07-21 05:11:49,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 05:11:49,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:11:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 05:11:49,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:49,346 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-21 05:11:49,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-21 05:11:49,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248465783] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:49,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:11:49,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 30 [2022-07-21 05:11:49,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122641311] [2022-07-21 05:11:49,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:11:49,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 05:11:49,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 05:11:49,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 05:11:49,447 INFO L87 Difference]: Start difference. First operand 141 states and 238 transitions. Second operand has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-21 05:11:50,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:50,432 INFO L93 Difference]: Finished difference Result 168 states and 272 transitions. [2022-07-21 05:11:50,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 05:11:50,433 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 70 [2022-07-21 05:11:50,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:50,434 INFO L225 Difference]: With dead ends: 168 [2022-07-21 05:11:50,434 INFO L226 Difference]: Without dead ends: 166 [2022-07-21 05:11:50,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=284, Invalid=2908, Unknown=0, NotChecked=0, Total=3192 [2022-07-21 05:11:50,435 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:50,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 265 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 05:11:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-21 05:11:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2022-07-21 05:11:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 115 states have internal predecessors, (133), 23 states have call successors, (23), 12 states have call predecessors, (23), 20 states have return successors, (105), 30 states have call predecessors, (105), 13 states have call successors, (105) [2022-07-21 05:11:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 261 transitions. [2022-07-21 05:11:50,445 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 261 transitions. Word has length 70 [2022-07-21 05:11:50,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:50,445 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 261 transitions. [2022-07-21 05:11:50,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-21 05:11:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 261 transitions. [2022-07-21 05:11:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:11:50,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:50,447 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:50,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:50,663 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,SelfDestructingSolverStorable11 [2022-07-21 05:11:50,663 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:50,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1086227410, now seen corresponding path program 1 times [2022-07-21 05:11:50,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:50,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847184063] [2022-07-21 05:11:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:50,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:50,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:50,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:50,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:50,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:50,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 05:11:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:50,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:11:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:51,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:51,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:51,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:51,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-21 05:11:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 05:11:51,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:51,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847184063] [2022-07-21 05:11:51,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847184063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:51,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144825879] [2022-07-21 05:11:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:51,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:51,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:51,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:11:51,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 05:11:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:51,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-21 05:11:51,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:51,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:11:51,342 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 6 treesize of output 5 [2022-07-21 05:11:51,875 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 [2022-07-21 05:11:51,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 05:11:51,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:11:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 05:11:52,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:52,910 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-21 05:11:52,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2022-07-21 05:11:53,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144825879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:53,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:11:53,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 47 [2022-07-21 05:11:53,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256520411] [2022-07-21 05:11:53,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:11:53,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 05:11:53,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:11:53,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 05:11:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 05:11:53,144 INFO L87 Difference]: Start difference. First operand 158 states and 261 transitions. Second operand has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-21 05:11:55,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:11:55,191 INFO L93 Difference]: Finished difference Result 202 states and 370 transitions. [2022-07-21 05:11:55,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 05:11:55,191 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 71 [2022-07-21 05:11:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:11:55,193 INFO L225 Difference]: With dead ends: 202 [2022-07-21 05:11:55,193 INFO L226 Difference]: Without dead ends: 200 [2022-07-21 05:11:55,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=546, Invalid=7644, Unknown=0, NotChecked=0, Total=8190 [2022-07-21 05:11:55,194 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 114 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 05:11:55,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 403 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2131 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 05:11:55,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-21 05:11:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 169. [2022-07-21 05:11:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 121 states have (on average 1.165289256198347) internal successors, (141), 123 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 22 states have return successors, (136), 33 states have call predecessors, (136), 15 states have call successors, (136) [2022-07-21 05:11:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 302 transitions. [2022-07-21 05:11:55,205 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 302 transitions. Word has length 71 [2022-07-21 05:11:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:11:55,205 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 302 transitions. [2022-07-21 05:11:55,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-21 05:11:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 302 transitions. [2022-07-21 05:11:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 05:11:55,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:11:55,207 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:11:55,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 05:11:55,407 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,SelfDestructingSolverStorable12 [2022-07-21 05:11:55,407 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:11:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:11:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1479346186, now seen corresponding path program 1 times [2022-07-21 05:11:55,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:11:55,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517938208] [2022-07-21 05:11:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:55,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:11:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:55,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:55,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:55,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:55,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:11:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:55,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:11:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:55,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:11:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:55,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:55,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:55,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:11:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:55,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:11:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 05:11:55,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:11:55,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517938208] [2022-07-21 05:11:55,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517938208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:11:55,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34477554] [2022-07-21 05:11:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:11:55,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:11:55,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:11:55,968 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:11:55,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 05:11:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:11:56,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-21 05:11:56,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:11:56,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:11:56,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:11:56,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:11:56,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 05:11:56,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 05:11:56,433 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 05:11:56,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 05:11:56,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 05:11:56,477 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 23 treesize of output 22 [2022-07-21 05:11:57,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 05:11:57,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 05:11:57,226 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 05:11:57,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2022-07-21 05:11:57,238 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 05:11:57,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-21 05:11:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 05:11:57,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:11:57,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 05:11:57,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 05:12:00,031 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (let ((.cse0 (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8)) (.cse1 (+ 4 |c_nondet_tree_#res.offset|))) (and (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse0 |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse1) 0) (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse0 |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse1) 0))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0) (not (= v_nondet_tree_~n~0.base_BEFORE_CALL_7 0))))) is different from false [2022-07-21 05:12:02,124 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int) (v_ArrVal_1450 Int) (v_ArrVal_1448 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (let ((.cse1 (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8)) (.cse2 (+ 8 c_nondet_tree_~n~0.offset)) (.cse3 (+ 4 c_nondet_tree_~n~0.offset))) (and (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base) .cse2 v_ArrVal_1450)))) (store .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse1 c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse3) 0) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base) .cse2 v_ArrVal_1448)))) (store .cse4 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse4 v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse1 c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse3) 0))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0) (not (= v_nondet_tree_~n~0.base_BEFORE_CALL_7 0))))) is different from false [2022-07-21 05:12:04,151 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (and (forall ((v_ArrVal_1448 Int)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base) (+ 8 c_nondet_tree_~n~0.offset) v_ArrVal_1448)))) (store .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) (+ 4 c_nondet_tree_~n~0.offset)) 0)) (forall ((v_ArrVal_1450 Int)) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base) (+ 8 c_nondet_tree_~n~0.offset) v_ArrVal_1450)))) (store .cse1 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse1 v_nondet_tree_~n~0.base_BEFORE_CALL_7) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) (+ 4 c_nondet_tree_~n~0.offset)) 0))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0) (not (= v_nondet_tree_~n~0.base_BEFORE_CALL_7 0))))) is different from false [2022-07-21 05:12:04,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34477554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:04,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:12:04,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 46 [2022-07-21 05:12:04,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741122973] [2022-07-21 05:12:04,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:04,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 05:12:04,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 05:12:04,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2911, Unknown=3, NotChecked=330, Total=3422 [2022-07-21 05:12:04,154 INFO L87 Difference]: Start difference. First operand 169 states and 302 transitions. Second operand has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2022-07-21 05:12:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:06,025 INFO L93 Difference]: Finished difference Result 452 states and 844 transitions. [2022-07-21 05:12:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 05:12:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) Word has length 76 [2022-07-21 05:12:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:06,040 INFO L225 Difference]: With dead ends: 452 [2022-07-21 05:12:06,040 INFO L226 Difference]: Without dead ends: 440 [2022-07-21 05:12:06,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=650, Invalid=10489, Unknown=3, NotChecked=630, Total=11772 [2022-07-21 05:12:06,042 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 122 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 634 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:06,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 694 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1791 Invalid, 0 Unknown, 634 Unchecked, 0.6s Time] [2022-07-21 05:12:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-21 05:12:06,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2022-07-21 05:12:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 248 states have (on average 1.189516129032258) internal successors, (295), 254 states have internal predecessors, (295), 38 states have call successors, (38), 21 states have call predecessors, (38), 52 states have return successors, (326), 63 states have call predecessors, (326), 22 states have call successors, (326) [2022-07-21 05:12:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 659 transitions. [2022-07-21 05:12:06,068 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 659 transitions. Word has length 76 [2022-07-21 05:12:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:06,069 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 659 transitions. [2022-07-21 05:12:06,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2022-07-21 05:12:06,069 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 659 transitions. [2022-07-21 05:12:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 05:12:06,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:06,072 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:06,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:06,303 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,SelfDestructingSolverStorable13 [2022-07-21 05:12:06,304 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1523837565, now seen corresponding path program 1 times [2022-07-21 05:12:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:06,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578138117] [2022-07-21 05:12:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:12:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:12:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:12:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:12:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 05:12:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 05:12:06,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:06,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578138117] [2022-07-21 05:12:06,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578138117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:06,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133129357] [2022-07-21 05:12:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:06,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:06,552 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:06,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 05:12:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:06,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 05:12:06,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:06,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 05:12:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 05:12:06,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 05:12:07,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133129357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:12:07,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:12:07,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 30 [2022-07-21 05:12:07,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142114340] [2022-07-21 05:12:07,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:07,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 05:12:07,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 05:12:07,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-07-21 05:12:07,193 INFO L87 Difference]: Start difference. First operand 339 states and 659 transitions. Second operand has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-21 05:12:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:07,760 INFO L93 Difference]: Finished difference Result 493 states and 970 transitions. [2022-07-21 05:12:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 05:12:07,761 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) Word has length 72 [2022-07-21 05:12:07,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:07,764 INFO L225 Difference]: With dead ends: 493 [2022-07-21 05:12:07,765 INFO L226 Difference]: Without dead ends: 466 [2022-07-21 05:12:07,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 05:12:07,766 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 86 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:07,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 454 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 535 Invalid, 0 Unknown, 305 Unchecked, 0.2s Time] [2022-07-21 05:12:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-07-21 05:12:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 370. [2022-07-21 05:12:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 271 states have (on average 1.2029520295202951) internal successors, (326), 275 states have internal predecessors, (326), 42 states have call successors, (42), 24 states have call predecessors, (42), 56 states have return successors, (290), 70 states have call predecessors, (290), 26 states have call successors, (290) [2022-07-21 05:12:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 658 transitions. [2022-07-21 05:12:07,798 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 658 transitions. Word has length 72 [2022-07-21 05:12:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:07,799 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 658 transitions. [2022-07-21 05:12:07,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-21 05:12:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 658 transitions. [2022-07-21 05:12:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 05:12:07,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:07,801 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:07,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:08,018 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,SelfDestructingSolverStorable14 [2022-07-21 05:12:08,019 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:08,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1595709832, now seen corresponding path program 3 times [2022-07-21 05:12:08,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:08,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876636754] [2022-07-21 05:12:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:08,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:08,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:08,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:08,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:12:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:08,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:08,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:12:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:08,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:12:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:08,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:08,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:12:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:08,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:08,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:12:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-21 05:12:08,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:08,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876636754] [2022-07-21 05:12:08,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876636754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:08,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677513129] [2022-07-21 05:12:08,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:12:08,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:08,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:08,445 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:08,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 05:12:08,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 05:12:08,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:12:08,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-21 05:12:08,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:08,683 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 [2022-07-21 05:12:08,686 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 [2022-07-21 05:12:08,747 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-21 05:12:08,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-07-21 05:12:08,755 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-07-21 05:12:08,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-21 05:12:13,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 05:12:13,825 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-21 05:12:13,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 45 [2022-07-21 05:12:13,836 INFO L356 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-07-21 05:12:13,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-07-21 05:12:13,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:12:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 05:12:14,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:14,451 INFO L356 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2022-07-21 05:12:14,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-07-21 05:12:14,629 INFO L356 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2022-07-21 05:12:14,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-07-21 05:12:16,866 WARN L833 $PredicateComparison]: unable to prove that (forall ((nondet_tree_~n~0.base Int)) (let ((.cse2 (+ 8 c_nondet_tree_~n~0.offset)) (.cse3 (+ |c_nondet_tree_#t~ret9.offset| 8))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#t~ret9.offset|)) |c_nondet_tree_#t~ret9.base|) .cse3)) (.cse0 (select (select (store |c_#memory_$Pointer$.base| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#t~ret9.base|)) |c_nondet_tree_#t~ret9.base|) .cse3))) (or (and (= .cse0 0) (= .cse1 0)) (and (= .cse1 c_nondet_tree_~n~0.offset) (= .cse0 nondet_tree_~n~0.base)))))) is different from false [2022-07-21 05:12:18,951 WARN L833 $PredicateComparison]: unable to prove that (forall ((nondet_tree_~n~0.base Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_33 Int)) (let ((.cse2 (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_33 8)) (.cse3 (+ 8 |c_nondet_tree_#res.offset|))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse3)) (.cse1 (select (select (store |c_#memory_$Pointer$.base| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse3))) (or (and (= .cse0 0) (= .cse1 0)) (and (= .cse0 v_nondet_tree_~n~0.offset_BEFORE_CALL_33) (= .cse1 nondet_tree_~n~0.base)))))) is different from false [2022-07-21 05:12:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 43 trivial. 5 not checked. [2022-07-21 05:12:19,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677513129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:12:19,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:12:19,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 23] total 63 [2022-07-21 05:12:19,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941524725] [2022-07-21 05:12:19,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:19,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-21 05:12:19,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:19,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-21 05:12:19,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3469, Unknown=4, NotChecked=238, Total=3906 [2022-07-21 05:12:19,080 INFO L87 Difference]: Start difference. First operand 370 states and 658 transitions. Second operand has 63 states, 53 states have (on average 1.9056603773584906) internal successors, (101), 42 states have internal predecessors, (101), 18 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) [2022-07-21 05:12:21,259 WARN L833 $PredicateComparison]: unable to prove that (and (= 0 |c_nondet_tree_#res.offset|) (= (select |c_old(#valid)| c_nondet_tree_~n~0.base) 0) (forall ((nondet_tree_~n~0.base Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_33 Int)) (let ((.cse2 (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_33 8)) (.cse3 (+ 8 |c_nondet_tree_#res.offset|))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse3)) (.cse1 (select (select (store |c_#memory_$Pointer$.base| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse3))) (or (and (= .cse0 0) (= .cse1 0)) (and (= .cse0 v_nondet_tree_~n~0.offset_BEFORE_CALL_33) (= .cse1 nondet_tree_~n~0.base)))))) (= (select (select |c_#memory_$Pointer$.offset| |c_nondet_tree_#res.base|) 8) 0) (not (= (select |c_#valid| c_nondet_tree_~n~0.base) 0)) (= (select (select |c_#memory_$Pointer$.base| |c_nondet_tree_#res.base|) 8) 0) (= (select |c_old(#valid)| |c_nondet_tree_#res.base|) 0) (= c_nondet_tree_~n~0.offset 0)) is different from false [2022-07-21 05:12:23,264 WARN L833 $PredicateComparison]: unable to prove that (and (= 0 |c_nondet_tree_#res.offset|) (forall ((nondet_tree_~n~0.base Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_33 Int)) (let ((.cse2 (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_33 8)) (.cse3 (+ 8 |c_nondet_tree_#res.offset|))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse3)) (.cse1 (select (select (store |c_#memory_$Pointer$.base| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse3))) (or (and (= .cse0 0) (= .cse1 0)) (and (= .cse0 v_nondet_tree_~n~0.offset_BEFORE_CALL_33) (= .cse1 nondet_tree_~n~0.base)))))) (= (select (select |c_#memory_$Pointer$.offset| |c_nondet_tree_#res.base|) 8) 0) (= (select (select |c_#memory_$Pointer$.base| |c_nondet_tree_#res.base|) 8) 0) (= (select |c_old(#valid)| |c_nondet_tree_#res.base|) 0)) is different from false [2022-07-21 05:12:25,282 WARN L833 $PredicateComparison]: unable to prove that (and (= 0 |c_nondet_tree_#res.offset|) (= (select |c_old(#valid)| c_nondet_tree_~n~0.base) 0) (forall ((nondet_tree_~n~0.base Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_33 Int)) (let ((.cse2 (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_33 8)) (.cse3 (+ 8 |c_nondet_tree_#res.offset|))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse3)) (.cse1 (select (select (store |c_#memory_$Pointer$.base| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse3))) (or (and (= .cse0 0) (= .cse1 0)) (and (= .cse0 v_nondet_tree_~n~0.offset_BEFORE_CALL_33) (= .cse1 nondet_tree_~n~0.base)))))) (= (select (select |c_#memory_$Pointer$.offset| |c_nondet_tree_#res.base|) 8) 0) (= (select (select |c_#memory_$Pointer$.base| |c_nondet_tree_#res.base|) 8) 0) (= (select |c_old(#valid)| |c_nondet_tree_#res.base|) 0) (= c_nondet_tree_~n~0.offset 0)) is different from false [2022-07-21 05:12:27,287 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| |c_nondet_tree_#t~ret9.base|) 8) 0) (= (select (select |c_#memory_$Pointer$.offset| |c_nondet_tree_#t~ret9.base|) 8) 0) (not (= |c_nondet_tree_#t~ret9.base| c_nondet_tree_~n~0.base)) (forall ((nondet_tree_~n~0.base Int)) (let ((.cse2 (+ 8 c_nondet_tree_~n~0.offset)) (.cse3 (+ |c_nondet_tree_#t~ret9.offset| 8))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#t~ret9.offset|)) |c_nondet_tree_#t~ret9.base|) .cse3)) (.cse0 (select (select (store |c_#memory_$Pointer$.base| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#t~ret9.base|)) |c_nondet_tree_#t~ret9.base|) .cse3))) (or (and (= .cse0 0) (= .cse1 0)) (and (= .cse1 c_nondet_tree_~n~0.offset) (= .cse0 nondet_tree_~n~0.base)))))) (= |c_nondet_tree_#t~ret9.offset| 0) (= c_nondet_tree_~n~0.offset 0)) is different from false [2022-07-21 05:12:30,022 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| |c_nondet_tree_#t~ret9.base|) 8) 0) (= (select (select |c_#memory_$Pointer$.offset| |c_nondet_tree_#t~ret9.base|) 8) 0) (forall ((nondet_tree_~n~0.base Int)) (let ((.cse2 (+ 8 c_nondet_tree_~n~0.offset)) (.cse3 (+ |c_nondet_tree_#t~ret9.offset| 8))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#t~ret9.offset|)) |c_nondet_tree_#t~ret9.base|) .cse3)) (.cse0 (select (select (store |c_#memory_$Pointer$.base| nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| nondet_tree_~n~0.base) .cse2 |c_nondet_tree_#t~ret9.base|)) |c_nondet_tree_#t~ret9.base|) .cse3))) (or (and (= .cse0 0) (= .cse1 0)) (and (= .cse1 c_nondet_tree_~n~0.offset) (= .cse0 nondet_tree_~n~0.base)))))) (= |c_nondet_tree_#t~ret9.offset| 0) (= c_nondet_tree_~n~0.offset 0)) is different from false [2022-07-21 05:12:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:34,737 INFO L93 Difference]: Finished difference Result 782 states and 1341 transitions. [2022-07-21 05:12:34,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-21 05:12:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 53 states have (on average 1.9056603773584906) internal successors, (101), 42 states have internal predecessors, (101), 18 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) Word has length 76 [2022-07-21 05:12:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:34,742 INFO L225 Difference]: With dead ends: 782 [2022-07-21 05:12:34,742 INFO L226 Difference]: Without dead ends: 741 [2022-07-21 05:12:34,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 2886 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=888, Invalid=12703, Unknown=9, NotChecked=1652, Total=15252 [2022-07-21 05:12:34,744 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 196 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 3005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1078 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:34,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 636 Invalid, 3005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1864 Invalid, 0 Unknown, 1078 Unchecked, 0.8s Time] [2022-07-21 05:12:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-07-21 05:12:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 549. [2022-07-21 05:12:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 407 states have (on average 1.2113022113022114) internal successors, (493), 402 states have internal predecessors, (493), 65 states have call successors, (65), 40 states have call predecessors, (65), 76 states have return successors, (508), 106 states have call predecessors, (508), 35 states have call successors, (508) [2022-07-21 05:12:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1066 transitions. [2022-07-21 05:12:34,789 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1066 transitions. Word has length 76 [2022-07-21 05:12:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:34,789 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 1066 transitions. [2022-07-21 05:12:34,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 53 states have (on average 1.9056603773584906) internal successors, (101), 42 states have internal predecessors, (101), 18 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) [2022-07-21 05:12:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1066 transitions. [2022-07-21 05:12:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 05:12:34,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:34,794 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:34,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:35,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:35,011 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:35,012 INFO L85 PathProgramCache]: Analyzing trace with hash -855775356, now seen corresponding path program 2 times [2022-07-21 05:12:35,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:35,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270686470] [2022-07-21 05:12:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:35,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:12:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:12:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:12:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:12:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-21 05:12:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:12:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-21 05:12:35,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:35,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270686470] [2022-07-21 05:12:35,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270686470] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:35,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370332904] [2022-07-21 05:12:35,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:12:35,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:35,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:35,584 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:35,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 05:12:35,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:12:35,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:12:35,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 05:12:35,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:36,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-07-21 05:12:36,226 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 25 treesize of output 13 [2022-07-21 05:12:36,334 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 [2022-07-21 05:12:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-21 05:12:36,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:36,667 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-21 05:12:36,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-21 05:12:36,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370332904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:36,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:12:36,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20] total 45 [2022-07-21 05:12:36,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905365037] [2022-07-21 05:12:36,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:36,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 05:12:36,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:36,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 05:12:36,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2617, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 05:12:36,871 INFO L87 Difference]: Start difference. First operand 549 states and 1066 transitions. Second operand has 45 states, 36 states have (on average 2.111111111111111) internal successors, (76), 33 states have internal predecessors, (76), 17 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (20), 15 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-21 05:12:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:42,634 INFO L93 Difference]: Finished difference Result 1345 states and 3151 transitions. [2022-07-21 05:12:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-21 05:12:42,635 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 36 states have (on average 2.111111111111111) internal successors, (76), 33 states have internal predecessors, (76), 17 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (20), 15 states have call predecessors, (20), 13 states have call successors, (20) Word has length 84 [2022-07-21 05:12:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:42,645 INFO L225 Difference]: With dead ends: 1345 [2022-07-21 05:12:42,646 INFO L226 Difference]: Without dead ends: 1343 [2022-07-21 05:12:42,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5335 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1255, Invalid=19051, Unknown=0, NotChecked=0, Total=20306 [2022-07-21 05:12:42,648 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 282 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 3417 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 3978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 3417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:42,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 465 Invalid, 3978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 3417 Invalid, 0 Unknown, 372 Unchecked, 1.6s Time] [2022-07-21 05:12:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-07-21 05:12:42,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 819. [2022-07-21 05:12:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 607 states have (on average 1.2306425041186162) internal successors, (747), 607 states have internal predecessors, (747), 87 states have call successors, (87), 58 states have call predecessors, (87), 124 states have return successors, (910), 153 states have call predecessors, (910), 53 states have call successors, (910) [2022-07-21 05:12:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1744 transitions. [2022-07-21 05:12:42,752 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1744 transitions. Word has length 84 [2022-07-21 05:12:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:42,754 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 1744 transitions. [2022-07-21 05:12:42,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 36 states have (on average 2.111111111111111) internal successors, (76), 33 states have internal predecessors, (76), 17 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (20), 15 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-21 05:12:42,754 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1744 transitions. [2022-07-21 05:12:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 05:12:42,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:42,758 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:42,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:42,970 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,SelfDestructingSolverStorable16 [2022-07-21 05:12:42,971 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:42,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:42,971 INFO L85 PathProgramCache]: Analyzing trace with hash 191480931, now seen corresponding path program 2 times [2022-07-21 05:12:42,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:42,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876531691] [2022-07-21 05:12:42,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:42,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:43,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:43,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:43,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:43,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:12:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:43,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 05:12:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:43,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:12:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:43,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:43,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:43,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:12:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:43,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 05:12:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-21 05:12:43,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:43,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876531691] [2022-07-21 05:12:43,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876531691] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:43,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541548488] [2022-07-21 05:12:43,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:12:43,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:43,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:43,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:43,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 05:12:43,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:12:43,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:12:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-21 05:12:43,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:44,181 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 [2022-07-21 05:12:44,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 05:12:44,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:12:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 05:12:44,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:45,019 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-21 05:12:45,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2022-07-21 05:12:45,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541548488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:45,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:12:45,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 51 [2022-07-21 05:12:45,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586545085] [2022-07-21 05:12:45,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:45,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 05:12:45,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 05:12:45,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4618, Unknown=0, NotChecked=0, Total=4830 [2022-07-21 05:12:45,440 INFO L87 Difference]: Start difference. First operand 819 states and 1744 transitions. Second operand has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-21 05:12:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:49,567 INFO L93 Difference]: Finished difference Result 1140 states and 2834 transitions. [2022-07-21 05:12:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-21 05:12:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 72 [2022-07-21 05:12:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:49,592 INFO L225 Difference]: With dead ends: 1140 [2022-07-21 05:12:49,593 INFO L226 Difference]: Without dead ends: 1138 [2022-07-21 05:12:49,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3452 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1095, Invalid=14405, Unknown=0, NotChecked=0, Total=15500 [2022-07-21 05:12:49,595 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 173 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 3224 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 3418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 3224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:49,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 368 Invalid, 3418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 3224 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-21 05:12:49,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-07-21 05:12:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 808. [2022-07-21 05:12:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 600 states have (on average 1.2316666666666667) internal successors, (739), 599 states have internal predecessors, (739), 85 states have call successors, (85), 58 states have call predecessors, (85), 122 states have return successors, (883), 150 states have call predecessors, (883), 51 states have call successors, (883) [2022-07-21 05:12:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1707 transitions. [2022-07-21 05:12:49,681 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1707 transitions. Word has length 72 [2022-07-21 05:12:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:49,681 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 1707 transitions. [2022-07-21 05:12:49,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-21 05:12:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1707 transitions. [2022-07-21 05:12:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-21 05:12:49,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:49,685 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:49,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:49,899 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,SelfDestructingSolverStorable17 [2022-07-21 05:12:49,899 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash -700730293, now seen corresponding path program 4 times [2022-07-21 05:12:49,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:49,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258406631] [2022-07-21 05:12:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:49,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:12:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:12:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:12:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 05:12:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:12:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:12:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-21 05:12:50,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:50,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258406631] [2022-07-21 05:12:50,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258406631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:50,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433804383] [2022-07-21 05:12:50,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 05:12:50,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:50,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:50,286 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:50,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 05:12:50,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 05:12:50,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:12:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-21 05:12:50,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:50,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:12:50,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 05:12:50,793 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 05:12:50,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 05:12:50,822 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 22 treesize of output 21 [2022-07-21 05:12:50,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:12:51,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 05:12:51,428 INFO L356 Elim1Store]: treesize reduction 135, result has 0.7 percent of original size [2022-07-21 05:12:51,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 1 [2022-07-21 05:12:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 35 proven. 52 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 05:12:51,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:51,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433804383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:51,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:12:51,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 43 [2022-07-21 05:12:51,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170096435] [2022-07-21 05:12:51,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 05:12:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 05:12:51,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 05:12:51,746 INFO L87 Difference]: Start difference. First operand 808 states and 1707 transitions. Second operand has 43 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 34 states have internal predecessors, (82), 16 states have call successors, (24), 8 states have call predecessors, (24), 14 states have return successors, (21), 18 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-21 05:12:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:12:53,593 INFO L93 Difference]: Finished difference Result 2106 states and 4998 transitions. [2022-07-21 05:12:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 05:12:53,594 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 34 states have internal predecessors, (82), 16 states have call successors, (24), 8 states have call predecessors, (24), 14 states have return successors, (21), 18 states have call predecessors, (21), 12 states have call successors, (21) Word has length 86 [2022-07-21 05:12:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:12:53,608 INFO L225 Difference]: With dead ends: 2106 [2022-07-21 05:12:53,608 INFO L226 Difference]: Without dead ends: 1985 [2022-07-21 05:12:53,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=490, Invalid=7700, Unknown=0, NotChecked=0, Total=8190 [2022-07-21 05:12:53,610 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 191 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1877 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 05:12:53,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 769 Invalid, 2259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1877 Invalid, 0 Unknown, 296 Unchecked, 0.6s Time] [2022-07-21 05:12:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-07-21 05:12:53,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1286. [2022-07-21 05:12:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 948 states have (on average 1.2426160337552743) internal successors, (1178), 983 states have internal predecessors, (1178), 100 states have call successors, (100), 64 states have call predecessors, (100), 237 states have return successors, (1959), 238 states have call predecessors, (1959), 66 states have call successors, (1959) [2022-07-21 05:12:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 3237 transitions. [2022-07-21 05:12:53,800 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 3237 transitions. Word has length 86 [2022-07-21 05:12:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:12:53,800 INFO L495 AbstractCegarLoop]: Abstraction has 1286 states and 3237 transitions. [2022-07-21 05:12:53,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 34 states have internal predecessors, (82), 16 states have call successors, (24), 8 states have call predecessors, (24), 14 states have return successors, (21), 18 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-21 05:12:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 3237 transitions. [2022-07-21 05:12:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 05:12:53,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:12:53,809 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:12:53,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 05:12:54,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:54,024 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:12:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:12:54,024 INFO L85 PathProgramCache]: Analyzing trace with hash 181678716, now seen corresponding path program 4 times [2022-07-21 05:12:54,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:12:54,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45471904] [2022-07-21 05:12:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:12:54,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:12:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:54,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:54,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:54,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:12:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:54,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:12:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:54,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 05:12:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:54,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:12:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:54,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:54,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:12:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:54,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:12:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:54,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-21 05:12:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:12:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 05:12:54,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:12:54,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45471904] [2022-07-21 05:12:54,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45471904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:54,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228522859] [2022-07-21 05:12:54,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 05:12:54,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:12:54,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:12:54,612 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:12:54,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 05:12:54,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 05:12:54,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:12:54,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-21 05:12:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:12:54,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:12:54,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:12:55,399 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 05:12:55,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 62 [2022-07-21 05:12:55,404 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 05:12:55,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2022-07-21 05:12:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 05:12:55,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:12:55,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228522859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:12:55,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:12:55,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19] total 39 [2022-07-21 05:12:55,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977679691] [2022-07-21 05:12:55,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:12:55,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 05:12:55,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:12:55,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 05:12:55,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 05:12:55,727 INFO L87 Difference]: Start difference. First operand 1286 states and 3237 transitions. Second operand has 39 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 29 states have internal predecessors, (77), 15 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-21 05:13:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:13:00,081 INFO L93 Difference]: Finished difference Result 5214 states and 22989 transitions. [2022-07-21 05:13:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-21 05:13:00,081 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 29 states have internal predecessors, (77), 15 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) Word has length 76 [2022-07-21 05:13:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:13:00,177 INFO L225 Difference]: With dead ends: 5214 [2022-07-21 05:13:00,177 INFO L226 Difference]: Without dead ends: 5201 [2022-07-21 05:13:00,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=631, Invalid=7024, Unknown=1, NotChecked=0, Total=7656 [2022-07-21 05:13:00,186 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 224 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 645 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 05:13:00,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 387 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1854 Invalid, 0 Unknown, 645 Unchecked, 0.8s Time] [2022-07-21 05:13:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2022-07-21 05:13:00,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 2968. [2022-07-21 05:13:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2968 states, 2198 states have (on average 1.2561419472247497) internal successors, (2761), 2257 states have internal predecessors, (2761), 223 states have call successors, (223), 93 states have call predecessors, (223), 546 states have return successors, (7446), 617 states have call predecessors, (7446), 174 states have call successors, (7446) [2022-07-21 05:13:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2968 states to 2968 states and 10430 transitions. [2022-07-21 05:13:00,938 INFO L78 Accepts]: Start accepts. Automaton has 2968 states and 10430 transitions. Word has length 76 [2022-07-21 05:13:00,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:13:00,938 INFO L495 AbstractCegarLoop]: Abstraction has 2968 states and 10430 transitions. [2022-07-21 05:13:00,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 29 states have internal predecessors, (77), 15 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-21 05:13:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2968 states and 10430 transitions. [2022-07-21 05:13:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 05:13:00,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:13:00,955 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:13:00,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 05:13:01,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:13:01,191 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:13:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:13:01,192 INFO L85 PathProgramCache]: Analyzing trace with hash 298042362, now seen corresponding path program 2 times [2022-07-21 05:13:01,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:13:01,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063296786] [2022-07-21 05:13:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:13:01,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:13:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:01,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:01,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:13:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:01,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:13:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:01,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:13:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:01,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 05:13:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:01,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 05:13:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:01,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:01,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:01,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:13:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:01,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-21 05:13:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-21 05:13:01,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:13:01,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063296786] [2022-07-21 05:13:01,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063296786] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:13:01,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276568765] [2022-07-21 05:13:01,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:13:01,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:13:01,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:13:01,640 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:13:01,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 05:13:01,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:13:01,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:13:01,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 114 conjunts are in the unsatisfiable core [2022-07-21 05:13:01,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:13:01,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:13:01,908 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 [2022-07-21 05:13:01,910 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 [2022-07-21 05:13:01,925 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 05:13:01,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 05:13:01,931 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 [2022-07-21 05:13:01,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-21 05:13:01,959 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-21 05:13:01,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2022-07-21 05:13:01,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-21 05:13:02,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 05:13:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 05:13:02,618 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 05:13:02,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2022-07-21 05:13:02,622 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 05:13:02,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-21 05:13:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-21 05:13:02,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:13:03,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 05:13:03,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 05:13:03,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276568765] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:13:03,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:13:03,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 35 [2022-07-21 05:13:03,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530838187] [2022-07-21 05:13:03,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:13:03,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 05:13:03,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:13:03,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 05:13:03,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 05:13:03,337 INFO L87 Difference]: Start difference. First operand 2968 states and 10430 transitions. Second operand has 35 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 24 states have internal predecessors, (67), 11 states have call successors, (22), 10 states have call predecessors, (22), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-21 05:13:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:13:04,196 INFO L93 Difference]: Finished difference Result 3377 states and 11425 transitions. [2022-07-21 05:13:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 05:13:04,197 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 24 states have internal predecessors, (67), 11 states have call successors, (22), 10 states have call predecessors, (22), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) Word has length 76 [2022-07-21 05:13:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:13:04,241 INFO L225 Difference]: With dead ends: 3377 [2022-07-21 05:13:04,241 INFO L226 Difference]: Without dead ends: 3340 [2022-07-21 05:13:04,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=282, Invalid=3750, Unknown=0, NotChecked=0, Total=4032 [2022-07-21 05:13:04,246 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 80 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:13:04,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 559 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 984 Invalid, 0 Unknown, 251 Unchecked, 0.3s Time] [2022-07-21 05:13:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2022-07-21 05:13:04,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 3305. [2022-07-21 05:13:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 2448 states have (on average 1.2573529411764706) internal successors, (3078), 2504 states have internal predecessors, (3078), 257 states have call successors, (257), 105 states have call predecessors, (257), 599 states have return successors, (7959), 695 states have call predecessors, (7959), 206 states have call successors, (7959) [2022-07-21 05:13:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 11294 transitions. [2022-07-21 05:13:04,686 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 11294 transitions. Word has length 76 [2022-07-21 05:13:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:13:04,686 INFO L495 AbstractCegarLoop]: Abstraction has 3305 states and 11294 transitions. [2022-07-21 05:13:04,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 24 states have internal predecessors, (67), 11 states have call successors, (22), 10 states have call predecessors, (22), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-21 05:13:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 11294 transitions. [2022-07-21 05:13:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-21 05:13:04,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:13:04,706 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:13:04,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 05:13:04,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:13:04,920 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:13:04,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:13:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash -535102576, now seen corresponding path program 3 times [2022-07-21 05:13:04,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:13:04,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889251060] [2022-07-21 05:13:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:13:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:13:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:04,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:05,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:13:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:05,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:13:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:06,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:13:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:06,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:13:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:13:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:13:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 05:13:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:13:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 05:13:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:13:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:13:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 23 proven. 100 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-21 05:13:07,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:13:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889251060] [2022-07-21 05:13:07,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889251060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:13:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459983281] [2022-07-21 05:13:07,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:13:07,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:13:07,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:13:07,305 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:13:07,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 05:13:07,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-21 05:13:07,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:13:07,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 107 conjunts are in the unsatisfiable core [2022-07-21 05:13:07,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:13:07,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:13:07,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:13:07,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:13:08,057 WARN L855 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int) (v_ArrVal_2892 (Array Int Int)) (v_ArrVal_2891 (Array Int Int))) (and (= (select |c_old(#valid)| nondet_tree_~n~0.base) 0) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_2892)) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_2891) |c_#memory_$Pointer$.base|))) is different from true [2022-07-21 05:13:08,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 05:13:08,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 05:13:08,202 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 05:13:08,202 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 1 case distinctions, treesize of input 22 treesize of output 27 [2022-07-21 05:13:08,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 05:13:08,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 05:13:08,214 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 05:13:08,214 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 1 case distinctions, treesize of input 22 treesize of output 27 [2022-07-21 05:13:08,230 INFO L356 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-07-21 05:13:08,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-07-21 05:13:08,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 05:13:08,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 05:13:08,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:13:08,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:13:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 181 trivial. 12 not checked. [2022-07-21 05:13:08,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:13:09,088 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 05:13:09,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2022-07-21 05:13:09,092 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 05:13:09,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2022-07-21 05:13:11,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459983281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:13:11,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:13:11,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 38 [2022-07-21 05:13:11,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531403786] [2022-07-21 05:13:11,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:13:11,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 05:13:11,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:13:11,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 05:13:11,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1743, Unknown=8, NotChecked=84, Total=1980 [2022-07-21 05:13:11,331 INFO L87 Difference]: Start difference. First operand 3305 states and 11294 transitions. Second operand has 38 states, 32 states have (on average 2.4375) internal successors, (78), 27 states have internal predecessors, (78), 15 states have call successors, (28), 9 states have call predecessors, (28), 12 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-21 05:13:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:13:14,794 INFO L93 Difference]: Finished difference Result 4928 states and 17124 transitions. [2022-07-21 05:13:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 05:13:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 2.4375) internal successors, (78), 27 states have internal predecessors, (78), 15 states have call successors, (28), 9 states have call predecessors, (28), 12 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) Word has length 108 [2022-07-21 05:13:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:13:14,847 INFO L225 Difference]: With dead ends: 4928 [2022-07-21 05:13:14,847 INFO L226 Difference]: Without dead ends: 4173 [2022-07-21 05:13:14,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=431, Invalid=4244, Unknown=21, NotChecked=134, Total=4830 [2022-07-21 05:13:14,927 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 128 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 05:13:14,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 491 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 811 Invalid, 0 Unknown, 406 Unchecked, 0.7s Time] [2022-07-21 05:13:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2022-07-21 05:13:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 3589. [2022-07-21 05:13:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 2661 states have (on average 1.2566704246523863) internal successors, (3344), 2724 states have internal predecessors, (3344), 278 states have call successors, (278), 105 states have call predecessors, (278), 649 states have return successors, (8271), 759 states have call predecessors, (8271), 230 states have call successors, (8271) [2022-07-21 05:13:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 11893 transitions. [2022-07-21 05:13:15,404 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 11893 transitions. Word has length 108 [2022-07-21 05:13:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:13:15,405 INFO L495 AbstractCegarLoop]: Abstraction has 3589 states and 11893 transitions. [2022-07-21 05:13:15,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 2.4375) internal successors, (78), 27 states have internal predecessors, (78), 15 states have call successors, (28), 9 states have call predecessors, (28), 12 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-21 05:13:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 11893 transitions. [2022-07-21 05:13:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-21 05:13:15,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:13:15,422 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:13:15,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 05:13:15,640 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,SelfDestructingSolverStorable21 [2022-07-21 05:13:15,641 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:13:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:13:15,641 INFO L85 PathProgramCache]: Analyzing trace with hash -476036866, now seen corresponding path program 4 times [2022-07-21 05:13:15,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:13:15,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097733449] [2022-07-21 05:13:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:13:15,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:13:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:15,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:15,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:13:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:15,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:13:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:17,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:13:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:17,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:13:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:17,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:13:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:17,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 05:13:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:17,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 05:13:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:17,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:18,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:18,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:13:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:18,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 05:13:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:18,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:13:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:18,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:13:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:13:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 19 proven. 78 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-21 05:13:18,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:13:18,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097733449] [2022-07-21 05:13:18,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097733449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:13:18,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494216987] [2022-07-21 05:13:18,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 05:13:18,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:13:18,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:13:18,062 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:13:18,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 05:13:18,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 05:13:18,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:13:18,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-21 05:13:18,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:13:18,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:13:18,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:13:18,552 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-21 05:13:18,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-21 05:13:18,592 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 05:13:18,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 05:13:18,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:13:18,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-21 05:13:20,747 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_task_~n#1.offset_BEFORE_CALL_55| Int)) (let ((.cse1 (+ 8 |v_ULTIMATE.start_task_~n#1.offset_BEFORE_CALL_55|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_45|) .cse1))) (and (not (= .cse0 |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_45|)) (not (= (select (select |c_#memory_$Pointer$.base| .cse0) (+ (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_45|) .cse1) 4)) 0)))))) is different from true [2022-07-21 05:13:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 26 proven. 62 refuted. 0 times theorem prover too weak. 37 trivial. 53 not checked. [2022-07-21 05:13:21,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:13:25,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494216987] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:13:25,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:13:25,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-07-21 05:13:25,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204424641] [2022-07-21 05:13:25,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:13:25,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 05:13:25,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:13:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 05:13:25,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2212, Unknown=2, NotChecked=94, Total=2450 [2022-07-21 05:13:25,477 INFO L87 Difference]: Start difference. First operand 3589 states and 11893 transitions. Second operand has 46 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 38 states have internal predecessors, (93), 22 states have call successors, (30), 7 states have call predecessors, (30), 18 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) [2022-07-21 05:14:00,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:00,389 INFO L93 Difference]: Finished difference Result 7291 states and 28687 transitions. [2022-07-21 05:14:00,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-21 05:14:00,390 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 38 states have internal predecessors, (93), 22 states have call successors, (30), 7 states have call predecessors, (30), 18 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) Word has length 95 [2022-07-21 05:14:00,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:00,553 INFO L225 Difference]: With dead ends: 7291 [2022-07-21 05:14:00,554 INFO L226 Difference]: Without dead ends: 7117 [2022-07-21 05:14:00,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2980 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=809, Invalid=10956, Unknown=11, NotChecked=214, Total=11990 [2022-07-21 05:14:00,559 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 151 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1016 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:00,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1117 Invalid, 3104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1924 Invalid, 0 Unknown, 1016 Unchecked, 3.9s Time] [2022-07-21 05:14:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2022-07-21 05:14:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 6575. [2022-07-21 05:14:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6575 states, 4893 states have (on average 1.26629879419579) internal successors, (6196), 5021 states have internal predecessors, (6196), 427 states have call successors, (427), 130 states have call predecessors, (427), 1254 states have return successors, (20228), 1423 states have call predecessors, (20228), 379 states have call successors, (20228) [2022-07-21 05:14:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6575 states to 6575 states and 26851 transitions. [2022-07-21 05:14:01,328 INFO L78 Accepts]: Start accepts. Automaton has 6575 states and 26851 transitions. Word has length 95 [2022-07-21 05:14:01,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:01,328 INFO L495 AbstractCegarLoop]: Abstraction has 6575 states and 26851 transitions. [2022-07-21 05:14:01,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 38 states have internal predecessors, (93), 22 states have call successors, (30), 7 states have call predecessors, (30), 18 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) [2022-07-21 05:14:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6575 states and 26851 transitions. [2022-07-21 05:14:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-21 05:14:01,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:01,351 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:14:01,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-21 05:14:01,571 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,SelfDestructingSolverStorable22 [2022-07-21 05:14:01,571 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1919074024, now seen corresponding path program 5 times [2022-07-21 05:14:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:01,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228508025] [2022-07-21 05:14:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:01,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:01,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:01,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:01,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:01,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:01,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 05:14:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:01,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:01,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:01,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 05:14:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:01,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:02,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:02,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:14:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:02,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 05:14:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:02,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:02,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:14:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-21 05:14:02,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:02,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228508025] [2022-07-21 05:14:02,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228508025] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:02,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542322550] [2022-07-21 05:14:02,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 05:14:02,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:02,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:14:02,204 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:14:02,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 05:14:02,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 05:14:02,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:14:02,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-21 05:14:02,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:14:02,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:14:03,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-21 05:14:03,496 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 11 [2022-07-21 05:14:03,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 05:14:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-21 05:14:03,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:14:04,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542322550] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:04,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:14:04,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29] total 54 [2022-07-21 05:14:04,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48879307] [2022-07-21 05:14:04,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:14:04,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 05:14:04,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 05:14:04,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4364, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 05:14:04,602 INFO L87 Difference]: Start difference. First operand 6575 states and 26851 transitions. Second operand has 54 states, 43 states have (on average 1.627906976744186) internal successors, (70), 39 states have internal predecessors, (70), 16 states have call successors, (24), 6 states have call predecessors, (24), 7 states have return successors, (18), 15 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-21 05:14:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:07,890 INFO L93 Difference]: Finished difference Result 7586 states and 32769 transitions. [2022-07-21 05:14:07,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-21 05:14:07,890 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 43 states have (on average 1.627906976744186) internal successors, (70), 39 states have internal predecessors, (70), 16 states have call successors, (24), 6 states have call predecessors, (24), 7 states have return successors, (18), 15 states have call predecessors, (18), 12 states have call successors, (18) Word has length 95 [2022-07-21 05:14:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:08,042 INFO L225 Difference]: With dead ends: 7586 [2022-07-21 05:14:08,042 INFO L226 Difference]: Without dead ends: 7584 [2022-07-21 05:14:08,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2108 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=762, Invalid=10580, Unknown=0, NotChecked=0, Total=11342 [2022-07-21 05:14:08,048 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 185 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 2927 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:08,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 490 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2927 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 05:14:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7584 states. [2022-07-21 05:14:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7584 to 6231. [2022-07-21 05:14:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6231 states, 4681 states have (on average 1.2732322153386029) internal successors, (5960), 4725 states have internal predecessors, (5960), 403 states have call successors, (403), 126 states have call predecessors, (403), 1146 states have return successors, (16813), 1379 states have call predecessors, (16813), 361 states have call successors, (16813) [2022-07-21 05:14:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6231 states to 6231 states and 23176 transitions. [2022-07-21 05:14:09,473 INFO L78 Accepts]: Start accepts. Automaton has 6231 states and 23176 transitions. Word has length 95 [2022-07-21 05:14:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:09,474 INFO L495 AbstractCegarLoop]: Abstraction has 6231 states and 23176 transitions. [2022-07-21 05:14:09,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 43 states have (on average 1.627906976744186) internal successors, (70), 39 states have internal predecessors, (70), 16 states have call successors, (24), 6 states have call predecessors, (24), 7 states have return successors, (18), 15 states have call predecessors, (18), 12 states have call successors, (18) [2022-07-21 05:14:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 6231 states and 23176 transitions. [2022-07-21 05:14:09,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-21 05:14:09,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:09,592 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:14:09,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 05:14:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:09,829 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:09,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1548539491, now seen corresponding path program 3 times [2022-07-21 05:14:09,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:09,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626816620] [2022-07-21 05:14:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 05:14:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 05:14:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:14:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 05:14:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:14:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 44 proven. 46 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-07-21 05:14:10,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:10,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626816620] [2022-07-21 05:14:10,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626816620] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:10,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113335738] [2022-07-21 05:14:10,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:14:10,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:10,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:14:10,400 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:14:10,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 05:14:10,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 05:14:10,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:14:10,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-21 05:14:10,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:14:11,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:14:11,082 INFO L356 Elim1Store]: treesize reduction 23, result has 42.5 percent of original size [2022-07-21 05:14:11,082 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 1 case distinctions, treesize of input 22 treesize of output 29 [2022-07-21 05:14:11,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 05:14:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 113 proven. 46 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-21 05:14:11,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:14:12,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113335738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:12,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:14:12,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 43 [2022-07-21 05:14:12,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286585226] [2022-07-21 05:14:12,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:14:12,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 05:14:12,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:12,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 05:14:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 05:14:12,282 INFO L87 Difference]: Start difference. First operand 6231 states and 23176 transitions. Second operand has 43 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 33 states have internal predecessors, (89), 17 states have call successors, (29), 6 states have call predecessors, (29), 11 states have return successors, (25), 19 states have call predecessors, (25), 14 states have call successors, (25) [2022-07-21 05:14:29,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:29,935 INFO L93 Difference]: Finished difference Result 10938 states and 42177 transitions. [2022-07-21 05:14:29,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-21 05:14:29,936 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 33 states have internal predecessors, (89), 17 states have call successors, (29), 6 states have call predecessors, (29), 11 states have return successors, (25), 19 states have call predecessors, (25), 14 states have call successors, (25) Word has length 116 [2022-07-21 05:14:29,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:30,136 INFO L225 Difference]: With dead ends: 10938 [2022-07-21 05:14:30,136 INFO L226 Difference]: Without dead ends: 10881 [2022-07-21 05:14:30,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3455 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=867, Invalid=12471, Unknown=2, NotChecked=0, Total=13340 [2022-07-21 05:14:30,157 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 88 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 551 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:30,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 695 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2062 Invalid, 0 Unknown, 551 Unchecked, 0.8s Time] [2022-07-21 05:14:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2022-07-21 05:14:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 9244. [2022-07-21 05:14:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9244 states, 7026 states have (on average 1.2845146598348989) internal successors, (9025), 6989 states have internal predecessors, (9025), 545 states have call successors, (545), 150 states have call predecessors, (545), 1672 states have return successors, (27408), 2104 states have call predecessors, (27408), 503 states have call successors, (27408) [2022-07-21 05:14:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9244 states to 9244 states and 36978 transitions. [2022-07-21 05:14:31,921 INFO L78 Accepts]: Start accepts. Automaton has 9244 states and 36978 transitions. Word has length 116 [2022-07-21 05:14:31,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:31,923 INFO L495 AbstractCegarLoop]: Abstraction has 9244 states and 36978 transitions. [2022-07-21 05:14:31,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 33 states have internal predecessors, (89), 17 states have call successors, (29), 6 states have call predecessors, (29), 11 states have return successors, (25), 19 states have call predecessors, (25), 14 states have call successors, (25) [2022-07-21 05:14:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 9244 states and 36978 transitions. [2022-07-21 05:14:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-21 05:14:31,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:31,951 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:14:31,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 05:14:32,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:32,167 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:32,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2008571113, now seen corresponding path program 3 times [2022-07-21 05:14:32,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:32,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132106238] [2022-07-21 05:14:32,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:32,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 05:14:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 05:14:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:14:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-21 05:14:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 47 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 05:14:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:32,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132106238] [2022-07-21 05:14:32,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132106238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:32,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038877892] [2022-07-21 05:14:32,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:14:32,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:32,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:14:32,836 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:14:32,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 05:14:33,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 05:14:33,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:14:33,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 114 conjunts are in the unsatisfiable core [2022-07-21 05:14:33,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:14:33,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:14:33,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 05:14:33,322 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 05:14:33,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 05:14:33,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 05:14:33,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-21 05:14:33,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-21 05:14:33,437 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-21 05:14:33,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 33 [2022-07-21 05:14:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 46 proven. 51 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 05:14:34,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:14:34,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038877892] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:34,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:14:34,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2022-07-21 05:14:34,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056422700] [2022-07-21 05:14:34,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:14:34,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 05:14:34,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:34,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 05:14:34,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2813, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 05:14:34,572 INFO L87 Difference]: Start difference. First operand 9244 states and 36978 transitions. Second operand has 50 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 39 states have internal predecessors, (92), 21 states have call successors, (29), 10 states have call predecessors, (29), 16 states have return successors, (24), 20 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-21 05:14:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:37,573 INFO L93 Difference]: Finished difference Result 14884 states and 77232 transitions. [2022-07-21 05:14:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-21 05:14:37,574 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 39 states have internal predecessors, (92), 21 states have call successors, (29), 10 states have call predecessors, (29), 16 states have return successors, (24), 20 states have call predecessors, (24), 17 states have call successors, (24) Word has length 86 [2022-07-21 05:14:37,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:37,997 INFO L225 Difference]: With dead ends: 14884 [2022-07-21 05:14:37,997 INFO L226 Difference]: Without dead ends: 14831 [2022-07-21 05:14:38,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3101 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=725, Invalid=11265, Unknown=0, NotChecked=0, Total=11990 [2022-07-21 05:14:38,030 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 161 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 3424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1037 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:38,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 882 Invalid, 3424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2270 Invalid, 0 Unknown, 1037 Unchecked, 0.8s Time] [2022-07-21 05:14:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14831 states. [2022-07-21 05:14:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14831 to 10694. [2022-07-21 05:14:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10694 states, 8146 states have (on average 1.2867665111711268) internal successors, (10482), 8076 states have internal predecessors, (10482), 621 states have call successors, (621), 164 states have call predecessors, (621), 1926 states have return successors, (34370), 2453 states have call predecessors, (34370), 579 states have call successors, (34370) [2022-07-21 05:14:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10694 states to 10694 states and 45473 transitions. [2022-07-21 05:14:40,063 INFO L78 Accepts]: Start accepts. Automaton has 10694 states and 45473 transitions. Word has length 86 [2022-07-21 05:14:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:40,063 INFO L495 AbstractCegarLoop]: Abstraction has 10694 states and 45473 transitions. [2022-07-21 05:14:40,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 39 states have internal predecessors, (92), 21 states have call successors, (29), 10 states have call predecessors, (29), 16 states have return successors, (24), 20 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-21 05:14:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10694 states and 45473 transitions. [2022-07-21 05:14:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-21 05:14:40,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:40,101 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:14:40,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 05:14:40,314 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,SelfDestructingSolverStorable25 [2022-07-21 05:14:40,314 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:40,315 INFO L85 PathProgramCache]: Analyzing trace with hash -560347655, now seen corresponding path program 5 times [2022-07-21 05:14:40,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:40,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169701962] [2022-07-21 05:14:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:40,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 05:14:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:14:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:14:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:14:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-21 05:14:40,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:40,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169701962] [2022-07-21 05:14:40,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169701962] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:40,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544666439] [2022-07-21 05:14:40,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 05:14:40,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:40,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:14:40,951 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:14:40,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 05:14:41,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 05:14:41,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:14:41,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-21 05:14:41,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:14:41,989 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 05:14:41,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 65 [2022-07-21 05:14:41,994 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 05:14:41,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 48 [2022-07-21 05:14:42,089 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 [2022-07-21 05:14:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-21 05:14:42,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:14:42,979 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 05:14:42,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 68 [2022-07-21 05:14:45,530 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 05:14:45,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2022-07-21 05:14:45,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544666439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:45,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:14:45,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 55 [2022-07-21 05:14:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922002361] [2022-07-21 05:14:45,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:14:45,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-21 05:14:45,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-21 05:14:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4499, Unknown=1, NotChecked=0, Total=4692 [2022-07-21 05:14:45,793 INFO L87 Difference]: Start difference. First operand 10694 states and 45473 transitions. Second operand has 55 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-21 05:14:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:50,234 INFO L93 Difference]: Finished difference Result 18410 states and 87331 transitions. [2022-07-21 05:14:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-21 05:14:50,235 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) Word has length 99 [2022-07-21 05:14:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:50,671 INFO L225 Difference]: With dead ends: 18410 [2022-07-21 05:14:50,672 INFO L226 Difference]: Without dead ends: 18408 [2022-07-21 05:14:50,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2953 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1080, Invalid=14171, Unknown=1, NotChecked=0, Total=15252 [2022-07-21 05:14:50,710 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 139 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 2843 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 645 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:50,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 453 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2843 Invalid, 0 Unknown, 645 Unchecked, 1.1s Time] [2022-07-21 05:14:50,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18408 states. [2022-07-21 05:14:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18408 to 12088. [2022-07-21 05:14:53,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12088 states, 9062 states have (on average 1.2807327300816598) internal successors, (11606), 9306 states have internal predecessors, (11606), 621 states have call successors, (621), 164 states have call predecessors, (621), 2404 states have return successors, (43931), 2617 states have call predecessors, (43931), 579 states have call successors, (43931) [2022-07-21 05:14:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12088 states to 12088 states and 56158 transitions. [2022-07-21 05:14:53,822 INFO L78 Accepts]: Start accepts. Automaton has 12088 states and 56158 transitions. Word has length 99 [2022-07-21 05:14:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:53,823 INFO L495 AbstractCegarLoop]: Abstraction has 12088 states and 56158 transitions. [2022-07-21 05:14:53,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-21 05:14:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 12088 states and 56158 transitions. [2022-07-21 05:14:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-21 05:14:53,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:53,888 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:14:53,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 05:14:54,091 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,SelfDestructingSolverStorable26 [2022-07-21 05:14:54,092 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:54,092 INFO L85 PathProgramCache]: Analyzing trace with hash -285986040, now seen corresponding path program 3 times [2022-07-21 05:14:54,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:54,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331578834] [2022-07-21 05:14:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:54,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:54,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:54,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:54,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:54,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:54,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:54,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 05:14:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:54,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-21 05:14:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:54,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 05:14:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:54,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:54,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:14:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:55,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:55,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:14:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:55,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:14:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:55,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 05:14:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 47 proven. 79 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 05:14:55,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:55,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331578834] [2022-07-21 05:14:55,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331578834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:55,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150009978] [2022-07-21 05:14:55,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:14:55,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:55,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:14:55,357 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:14:55,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 05:14:56,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-21 05:14:56,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:14:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 150 conjunts are in the unsatisfiable core [2022-07-21 05:14:56,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:14:56,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 05:14:56,185 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 [2022-07-21 05:14:56,188 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 [2022-07-21 05:14:56,201 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 05:14:56,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-21 05:14:56,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 05:14:56,212 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 23 treesize of output 22 [2022-07-21 05:15:00,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 05:15:00,223 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 05:15:00,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 50 [2022-07-21 05:15:00,228 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 05:15:00,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2022-07-21 05:15:00,382 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 [2022-07-21 05:15:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 53 proven. 79 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-21 05:15:00,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:15:01,289 INFO L356 Elim1Store]: treesize reduction 4, result has 93.2 percent of original size [2022-07-21 05:15:01,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 66 [2022-07-21 05:15:01,610 INFO L356 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2022-07-21 05:15:01,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 54 [2022-07-21 05:15:03,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150009978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:15:03,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:15:03,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 35] total 67 [2022-07-21 05:15:03,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847546186] [2022-07-21 05:15:03,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:15:03,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-21 05:15:03,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:15:03,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-21 05:15:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=6223, Unknown=5, NotChecked=0, Total=6480 [2022-07-21 05:15:03,772 INFO L87 Difference]: Start difference. First operand 12088 states and 56158 transitions. Second operand has 67 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 49 states have internal predecessors, (101), 22 states have call successors, (31), 10 states have call predecessors, (31), 15 states have return successors, (24), 22 states have call predecessors, (24), 16 states have call successors, (24)