./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/array-tiling/pnr5.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 c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:57:05,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:57:05,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:57:05,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:57:05,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:57:05,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:57:05,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:57:05,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:57:05,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:57:05,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:57:05,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:57:05,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:57:05,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:57:05,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:57:05,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:57:05,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:57:05,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:57:05,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:57:05,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:57:05,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:57:05,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:57:05,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:57:05,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:57:05,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:57:05,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:57:05,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:57:05,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:57:05,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:57:05,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:57:05,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:57:05,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:57:05,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:57:05,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:57:05,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:57:05,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:57:05,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:57:05,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:57:05,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:57:05,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:57:05,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:57:05,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:57:05,643 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:57:05,667 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:57:05,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:57:05,668 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:57:05,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:57:05,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:57:05,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:57:05,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:57:05,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:57:05,670 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:57:05,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:57:05,671 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:57:05,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:57:05,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:57:05,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:57:05,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:57:05,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:57:05,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:57:05,672 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:57:05,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:57:05,673 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:57:05,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:57:05,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:57:05,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:57:05,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:57:05,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:57:05,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:57:05,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:57:05,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:57:05,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:57:05,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:57:05,675 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:57:05,675 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:57:05,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:57:05,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:57:05,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b [2021-12-16 22:57:05,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:57:05,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:57:05,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:57:05,887 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:57:05,888 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:57:05,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr5.c [2021-12-16 22:57:05,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/076f10ea0/6665a71bed43483181f43337a4610212/FLAG3216ae684 [2021-12-16 22:57:06,281 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:57:06,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c [2021-12-16 22:57:06,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/076f10ea0/6665a71bed43483181f43337a4610212/FLAG3216ae684 [2021-12-16 22:57:06,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/076f10ea0/6665a71bed43483181f43337a4610212 [2021-12-16 22:57:06,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:57:06,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:57:06,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:57:06,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:57:06,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:57:06,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b83f69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06, skipping insertion in model container [2021-12-16 22:57:06,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:57:06,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:57:06,852 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/array-tiling/pnr5.c[395,408] [2021-12-16 22:57:06,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:57:06,872 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:57:06,880 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/array-tiling/pnr5.c[395,408] [2021-12-16 22:57:06,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:57:06,897 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:57:06,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06 WrapperNode [2021-12-16 22:57:06,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:57:06,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:57:06,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:57:06,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:57:06,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,921 INFO L137 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2021-12-16 22:57:06,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:57:06,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:57:06,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:57:06,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:57:06,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:57:06,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:57:06,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:57:06,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:57:06,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06" (1/1) ... [2021-12-16 22:57:06,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:57:06,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:06,985 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) [2021-12-16 22:57:06,990 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 [2021-12-16 22:57:07,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:57:07,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:57:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:57:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 22:57:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-12-16 22:57:07,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-12-16 22:57:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:57:07,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:57:07,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:57:07,052 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:57:07,053 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:57:07,223 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:57:07,228 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:57:07,228 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 22:57:07,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:57:07 BoogieIcfgContainer [2021-12-16 22:57:07,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:57:07,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:57:07,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:57:07,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:57:07,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:57:06" (1/3) ... [2021-12-16 22:57:07,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b58206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:57:07, skipping insertion in model container [2021-12-16 22:57:07,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:57:06" (2/3) ... [2021-12-16 22:57:07,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b58206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:57:07, skipping insertion in model container [2021-12-16 22:57:07,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:57:07" (3/3) ... [2021-12-16 22:57:07,237 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr5.c [2021-12-16 22:57:07,243 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:57:07,243 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:57:07,278 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:57:07,283 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 22:57:07,285 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:57:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 22:57:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 22:57:07,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:07,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:07,301 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:07,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1765780314, now seen corresponding path program 1 times [2021-12-16 22:57:07,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:07,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933280377] [2021-12-16 22:57:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:07,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:57:07,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:07,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933280377] [2021-12-16 22:57:07,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933280377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:57:07,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:57:07,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 22:57:07,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046572443] [2021-12-16 22:57:07,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:57:07,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 22:57:07,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:07,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 22:57:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:57:07,453 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:57:07,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:07,475 INFO L93 Difference]: Finished difference Result 69 states and 98 transitions. [2021-12-16 22:57:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 22:57:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 22:57:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:07,481 INFO L225 Difference]: With dead ends: 69 [2021-12-16 22:57:07,482 INFO L226 Difference]: Without dead ends: 33 [2021-12-16 22:57:07,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 22:57:07,489 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:07,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:57:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-16 22:57:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-16 22:57:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 22:57:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-12-16 22:57:07,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 11 [2021-12-16 22:57:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:07,533 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-12-16 22:57:07,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:57:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-12-16 22:57:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 22:57:07,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:07,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:07,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:57:07,537 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:07,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1807338759, now seen corresponding path program 1 times [2021-12-16 22:57:07,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:07,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793453687] [2021-12-16 22:57:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:07,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:57:07,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793453687] [2021-12-16 22:57:07,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793453687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:57:07,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:57:07,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 22:57:07,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017538988] [2021-12-16 22:57:07,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:57:07,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 22:57:07,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:07,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 22:57:07,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:57:07,711 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:57:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:07,840 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-12-16 22:57:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:57:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 22:57:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:07,843 INFO L225 Difference]: With dead ends: 57 [2021-12-16 22:57:07,843 INFO L226 Difference]: Without dead ends: 50 [2021-12-16 22:57:07,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:57:07,848 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:07,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 40 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:57:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-16 22:57:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2021-12-16 22:57:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-16 22:57:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-12-16 22:57:07,864 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 11 [2021-12-16 22:57:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:07,864 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-12-16 22:57:07,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:57:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-12-16 22:57:07,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 22:57:07,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:07,866 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:07,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 22:57:07,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1950771071, now seen corresponding path program 1 times [2021-12-16 22:57:07,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:07,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20801533] [2021-12-16 22:57:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:07,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:08,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:08,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:08,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:08,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:08,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:08,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:08,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20801533] [2021-12-16 22:57:08,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20801533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:08,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477528080] [2021-12-16 22:57:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:08,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:08,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:08,142 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) [2021-12-16 22:57:08,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:57:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:08,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 22:57:08,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:08,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:57:08,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:08,369 INFO L388 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 [2021-12-16 22:57:08,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:08,403 INFO L388 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 [2021-12-16 22:57:08,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:08,436 INFO L388 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 [2021-12-16 22:57:08,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:08,472 INFO L388 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 [2021-12-16 22:57:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:08,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:08,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-16 22:57:08,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-16 22:57:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:08,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477528080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:57:08,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:57:08,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2021-12-16 22:57:08,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786734566] [2021-12-16 22:57:08,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:08,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 22:57:08,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:08,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 22:57:08,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-16 22:57:08,719 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-16 22:57:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:08,991 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2021-12-16 22:57:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:57:08,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2021-12-16 22:57:08,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:08,993 INFO L225 Difference]: With dead ends: 120 [2021-12-16 22:57:08,993 INFO L226 Difference]: Without dead ends: 118 [2021-12-16 22:57:08,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:57:08,994 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:08,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 293 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:57:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-16 22:57:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 54. [2021-12-16 22:57:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 22:57:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2021-12-16 22:57:09,001 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 43 [2021-12-16 22:57:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:09,001 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2021-12-16 22:57:09,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-16 22:57:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2021-12-16 22:57:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 22:57:09,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:09,003 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:09,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:09,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:09,219 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:09,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:09,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1642596351, now seen corresponding path program 1 times [2021-12-16 22:57:09,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:09,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145211701] [2021-12-16 22:57:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:09,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:09,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:09,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:09,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:09,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:09,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:09,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:09,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145211701] [2021-12-16 22:57:09,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145211701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:09,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275584707] [2021-12-16 22:57:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:09,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:09,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:09,416 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) [2021-12-16 22:57:09,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:57:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:09,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 22:57:09,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:09,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:57:09,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:09,642 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:09,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:09,698 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:09,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:09,755 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:09,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:09,818 INFO L388 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 [2021-12-16 22:57:09,874 INFO L388 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 [2021-12-16 22:57:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:57:09,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:10,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-16 22:57:10,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-16 22:57:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:10,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275584707] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:57:10,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:57:10,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-12-16 22:57:10,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854781792] [2021-12-16 22:57:10,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:10,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:57:10,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:10,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:57:10,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:57:10,130 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-16 22:57:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:10,696 INFO L93 Difference]: Finished difference Result 179 states and 251 transitions. [2021-12-16 22:57:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 22:57:10,697 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 43 [2021-12-16 22:57:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:10,699 INFO L225 Difference]: With dead ends: 179 [2021-12-16 22:57:10,699 INFO L226 Difference]: Without dead ends: 177 [2021-12-16 22:57:10,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 75 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 22:57:10,700 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 145 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:10,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 516 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 643 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2021-12-16 22:57:10,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-16 22:57:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 87. [2021-12-16 22:57:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.359375) internal successors, (87), 65 states have internal predecessors, (87), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-16 22:57:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 127 transitions. [2021-12-16 22:57:10,713 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 127 transitions. Word has length 43 [2021-12-16 22:57:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:10,713 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 127 transitions. [2021-12-16 22:57:10,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-16 22:57:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 127 transitions. [2021-12-16 22:57:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 22:57:10,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:10,715 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:10,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:10,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-16 22:57:10,923 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:10,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:10,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1666037387, now seen corresponding path program 1 times [2021-12-16 22:57:10,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:10,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060362689] [2021-12-16 22:57:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:10,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:11,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:11,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:11,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:11,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:11,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:11,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:11,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060362689] [2021-12-16 22:57:11,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060362689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:11,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268420153] [2021-12-16 22:57:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:11,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:11,067 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) [2021-12-16 22:57:11,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:57:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:11,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 22:57:11,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:11,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:57:11,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:11,194 INFO L388 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 [2021-12-16 22:57:11,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:11,218 INFO L388 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 [2021-12-16 22:57:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:11,246 INFO L388 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 24 treesize of output 23 [2021-12-16 22:57:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:11,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:11,411 INFO L388 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 15 [2021-12-16 22:57:11,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:57:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:11,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268420153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:57:11,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:57:11,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2021-12-16 22:57:11,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043391326] [2021-12-16 22:57:11,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:11,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 22:57:11,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:11,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 22:57:11,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-16 22:57:11,456 INFO L87 Difference]: Start difference. First operand 87 states and 127 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-16 22:57:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:11,814 INFO L93 Difference]: Finished difference Result 322 states and 492 transitions. [2021-12-16 22:57:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 22:57:11,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 47 [2021-12-16 22:57:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:11,816 INFO L225 Difference]: With dead ends: 322 [2021-12-16 22:57:11,817 INFO L226 Difference]: Without dead ends: 320 [2021-12-16 22:57:11,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:57:11,818 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:11,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 345 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 22:57:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-16 22:57:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 153. [2021-12-16 22:57:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.3928571428571428) internal successors, (156), 114 states have internal predecessors, (156), 38 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-16 22:57:11,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2021-12-16 22:57:11,857 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 47 [2021-12-16 22:57:11,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:11,859 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2021-12-16 22:57:11,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-16 22:57:11,859 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2021-12-16 22:57:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 22:57:11,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:11,865 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:11,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:12,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:12,075 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:12,076 INFO L85 PathProgramCache]: Analyzing trace with hash -279833993, now seen corresponding path program 1 times [2021-12-16 22:57:12,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:12,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786107414] [2021-12-16 22:57:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:12,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:12,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:12,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:12,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:12,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:12,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:12,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:12,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786107414] [2021-12-16 22:57:12,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786107414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928622928] [2021-12-16 22:57:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:12,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:12,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:12,260 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) [2021-12-16 22:57:12,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:57:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:12,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 22:57:12,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:12,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:57:12,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:12,470 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:12,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:12,517 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:12,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:12,573 INFO L388 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 [2021-12-16 22:57:12,670 INFO L388 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 [2021-12-16 22:57:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 22:57:12,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:12,819 INFO L388 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 15 [2021-12-16 22:57:12,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:57:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:12,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928622928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:57:12,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:57:12,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2021-12-16 22:57:12,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675330975] [2021-12-16 22:57:12,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:12,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:57:12,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:12,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:57:12,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:57:12,885 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-16 22:57:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:13,573 INFO L93 Difference]: Finished difference Result 432 states and 643 transitions. [2021-12-16 22:57:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 22:57:13,574 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 47 [2021-12-16 22:57:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:13,576 INFO L225 Difference]: With dead ends: 432 [2021-12-16 22:57:13,576 INFO L226 Difference]: Without dead ends: 430 [2021-12-16 22:57:13,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 85 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 22:57:13,578 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 182 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:13,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 629 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 684 Invalid, 0 Unknown, 86 Unchecked, 0.4s Time] [2021-12-16 22:57:13,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-12-16 22:57:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 220. [2021-12-16 22:57:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 158 states have (on average 1.4113924050632911) internal successors, (223), 161 states have internal predecessors, (223), 57 states have call successors, (57), 4 states have call predecessors, (57), 4 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2021-12-16 22:57:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 337 transitions. [2021-12-16 22:57:13,603 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 337 transitions. Word has length 47 [2021-12-16 22:57:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:13,603 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 337 transitions. [2021-12-16 22:57:13,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-16 22:57:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 337 transitions. [2021-12-16 22:57:13,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 22:57:13,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:13,605 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:13,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:13,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:13,827 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash 131088491, now seen corresponding path program 2 times [2021-12-16 22:57:13,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:13,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470187891] [2021-12-16 22:57:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:13,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:13,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:13,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:13,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:13,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:13,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:13,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:13,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470187891] [2021-12-16 22:57:13,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470187891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:13,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068376994] [2021-12-16 22:57:13,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:57:13,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:13,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:13,941 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) [2021-12-16 22:57:13,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:57:13,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:57:13,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:57:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 22:57:13,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:14,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:57:14,055 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:57:14,056 INFO L388 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 30 treesize of output 29 [2021-12-16 22:57:14,076 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:57:14,077 INFO L388 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 [2021-12-16 22:57:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:14,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:14,230 INFO L388 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 15 [2021-12-16 22:57:14,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:57:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:14,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068376994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:57:14,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:57:14,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 13 [2021-12-16 22:57:14,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518380568] [2021-12-16 22:57:14,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:14,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 22:57:14,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:14,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 22:57:14,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-16 22:57:14,270 INFO L87 Difference]: Start difference. First operand 220 states and 337 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 22:57:14,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:14,882 INFO L93 Difference]: Finished difference Result 1182 states and 1872 transitions. [2021-12-16 22:57:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 22:57:14,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2021-12-16 22:57:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:14,888 INFO L225 Difference]: With dead ends: 1182 [2021-12-16 22:57:14,888 INFO L226 Difference]: Without dead ends: 1180 [2021-12-16 22:57:14,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 22:57:14,890 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 166 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:14,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 523 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 22:57:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-12-16 22:57:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 481. [2021-12-16 22:57:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 346 states have (on average 1.4421965317919074) internal successors, (499), 349 states have internal predecessors, (499), 130 states have call successors, (130), 4 states have call predecessors, (130), 4 states have return successors, (130), 127 states have call predecessors, (130), 130 states have call successors, (130) [2021-12-16 22:57:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 759 transitions. [2021-12-16 22:57:14,941 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 759 transitions. Word has length 51 [2021-12-16 22:57:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:14,942 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 759 transitions. [2021-12-16 22:57:14,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 22:57:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 759 transitions. [2021-12-16 22:57:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 22:57:14,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:14,944 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:14,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:15,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:15,160 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:15,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2054316525, now seen corresponding path program 1 times [2021-12-16 22:57:15,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:15,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965527189] [2021-12-16 22:57:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:15,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:15,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:15,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:15,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:15,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:15,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:15,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:15,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965527189] [2021-12-16 22:57:15,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965527189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:15,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384389062] [2021-12-16 22:57:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:15,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:15,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:15,262 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) [2021-12-16 22:57:15,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:57:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:15,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 22:57:15,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:15,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:57:15,491 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:57:15,492 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:15,543 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:57:15,544 INFO L388 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 [2021-12-16 22:57:15,649 INFO L388 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 7 [2021-12-16 22:57:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 22:57:15,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:15,810 INFO L388 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 15 [2021-12-16 22:57:15,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:57:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:15,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384389062] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:57:15,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:57:15,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-16 22:57:15,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197816176] [2021-12-16 22:57:15,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:15,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 22:57:15,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:15,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 22:57:15,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:57:15,894 INFO L87 Difference]: Start difference. First operand 481 states and 759 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-16 22:57:17,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:17,384 INFO L93 Difference]: Finished difference Result 1746 states and 2734 transitions. [2021-12-16 22:57:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-16 22:57:17,384 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 51 [2021-12-16 22:57:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:17,391 INFO L225 Difference]: With dead ends: 1746 [2021-12-16 22:57:17,392 INFO L226 Difference]: Without dead ends: 1744 [2021-12-16 22:57:17,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=542, Invalid=2880, Unknown=0, NotChecked=0, Total=3422 [2021-12-16 22:57:17,394 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 332 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:17,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1070 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1509 Invalid, 0 Unknown, 169 Unchecked, 0.9s Time] [2021-12-16 22:57:17,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-12-16 22:57:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 646. [2021-12-16 22:57:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 462 states have (on average 1.448051948051948) internal successors, (669), 465 states have internal predecessors, (669), 175 states have call successors, (175), 8 states have call predecessors, (175), 8 states have return successors, (175), 172 states have call predecessors, (175), 175 states have call successors, (175) [2021-12-16 22:57:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1019 transitions. [2021-12-16 22:57:17,451 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1019 transitions. Word has length 51 [2021-12-16 22:57:17,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:17,451 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1019 transitions. [2021-12-16 22:57:17,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-16 22:57:17,452 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1019 transitions. [2021-12-16 22:57:17,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 22:57:17,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:17,453 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:17,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:17,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:17,665 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:17,665 INFO L85 PathProgramCache]: Analyzing trace with hash 881708129, now seen corresponding path program 3 times [2021-12-16 22:57:17,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:17,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989979812] [2021-12-16 22:57:17,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:17,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:17,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:17,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:17,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:17,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:17,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:17,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:17,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989979812] [2021-12-16 22:57:17,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989979812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:17,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172997076] [2021-12-16 22:57:17,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:57:17,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:17,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:17,834 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) [2021-12-16 22:57:17,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:57:17,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 22:57:17,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:57:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 22:57:17,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:17,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:57:17,979 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:57:17,979 INFO L388 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 [2021-12-16 22:57:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:18,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:18,186 INFO L388 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 15 [2021-12-16 22:57:18,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:57:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:18,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172997076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:57:18,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:57:18,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-12-16 22:57:18,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313272083] [2021-12-16 22:57:18,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:18,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 22:57:18,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:18,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 22:57:18,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-12-16 22:57:18,232 INFO L87 Difference]: Start difference. First operand 646 states and 1019 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-16 22:57:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:20,455 INFO L93 Difference]: Finished difference Result 5695 states and 9168 transitions. [2021-12-16 22:57:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-16 22:57:20,456 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 55 [2021-12-16 22:57:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:20,476 INFO L225 Difference]: With dead ends: 5695 [2021-12-16 22:57:20,476 INFO L226 Difference]: Without dead ends: 5693 [2021-12-16 22:57:20,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 106 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=684, Invalid=3606, Unknown=0, NotChecked=0, Total=4290 [2021-12-16 22:57:20,482 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 223 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 2626 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 2626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:20,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1457 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 2626 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-16 22:57:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5693 states. [2021-12-16 22:57:20,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5693 to 1681. [2021-12-16 22:57:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1198 states have (on average 1.4699499165275458) internal successors, (1761), 1201 states have internal predecessors, (1761), 474 states have call successors, (474), 8 states have call predecessors, (474), 8 states have return successors, (474), 471 states have call predecessors, (474), 474 states have call successors, (474) [2021-12-16 22:57:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 2709 transitions. [2021-12-16 22:57:20,650 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 2709 transitions. Word has length 55 [2021-12-16 22:57:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:20,651 INFO L470 AbstractCegarLoop]: Abstraction has 1681 states and 2709 transitions. [2021-12-16 22:57:20,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-16 22:57:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 2709 transitions. [2021-12-16 22:57:20,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 22:57:20,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:20,655 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:20,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:20,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:20,871 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:20,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1022256739, now seen corresponding path program 1 times [2021-12-16 22:57:20,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:20,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046218975] [2021-12-16 22:57:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:20,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:21,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:21,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:21,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:21,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:21,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:21,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:21,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046218975] [2021-12-16 22:57:21,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046218975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:21,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157680481] [2021-12-16 22:57:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:21,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:21,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:21,044 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) [2021-12-16 22:57:21,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:57:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:21,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 22:57:21,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:21,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:57:21,278 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:57:21,278 INFO L388 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 [2021-12-16 22:57:21,420 INFO L388 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 7 [2021-12-16 22:57:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:57:21,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:21,582 INFO L388 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 15 [2021-12-16 22:57:21,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:57:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:21,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157680481] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:57:21,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:57:21,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 26 [2021-12-16 22:57:21,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851887602] [2021-12-16 22:57:21,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:21,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 22:57:21,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:21,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 22:57:21,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-16 22:57:21,706 INFO L87 Difference]: Start difference. First operand 1681 states and 2709 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-16 22:57:30,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:30,181 INFO L93 Difference]: Finished difference Result 6054 states and 9668 transitions. [2021-12-16 22:57:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-16 22:57:30,191 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 55 [2021-12-16 22:57:30,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:30,212 INFO L225 Difference]: With dead ends: 6054 [2021-12-16 22:57:30,212 INFO L226 Difference]: Without dead ends: 6052 [2021-12-16 22:57:30,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 105 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2538 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1007, Invalid=6999, Unknown=4, NotChecked=0, Total=8010 [2021-12-16 22:57:30,218 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 438 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 3460 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 4724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 3460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:30,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 1767 Invalid, 4724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 3460 Invalid, 0 Unknown, 255 Unchecked, 1.9s Time] [2021-12-16 22:57:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2021-12-16 22:57:30,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 2164. [2021-12-16 22:57:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 1538 states have (on average 1.4713914174252276) internal successors, (2263), 1541 states have internal predecessors, (2263), 609 states have call successors, (609), 16 states have call predecessors, (609), 16 states have return successors, (609), 606 states have call predecessors, (609), 609 states have call successors, (609) [2021-12-16 22:57:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 3481 transitions. [2021-12-16 22:57:30,417 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 3481 transitions. Word has length 55 [2021-12-16 22:57:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:30,417 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 3481 transitions. [2021-12-16 22:57:30,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-16 22:57:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 3481 transitions. [2021-12-16 22:57:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:57:30,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:30,419 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:30,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:30,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 22:57:30,635 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:30,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:30,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1863871831, now seen corresponding path program 4 times [2021-12-16 22:57:30,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:30,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691404206] [2021-12-16 22:57:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:30,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:30,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:30,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:30,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:30,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:30,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:30,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:30,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691404206] [2021-12-16 22:57:30,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691404206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:30,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010485104] [2021-12-16 22:57:30,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:57:30,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:30,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:30,735 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) [2021-12-16 22:57:30,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:57:30,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:57:30,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:57:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 22:57:30,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:30,843 INFO L388 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 [2021-12-16 22:57:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:30,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:31,029 INFO L388 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 15 [2021-12-16 22:57:31,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:57:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:31,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010485104] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:57:31,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:57:31,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 16 [2021-12-16 22:57:31,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187720077] [2021-12-16 22:57:31,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:31,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 22:57:31,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 22:57:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-16 22:57:31,092 INFO L87 Difference]: Start difference. First operand 2164 states and 3481 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-16 22:57:34,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:34,505 INFO L93 Difference]: Finished difference Result 14987 states and 24185 transitions. [2021-12-16 22:57:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-16 22:57:34,505 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2021-12-16 22:57:34,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:34,553 INFO L225 Difference]: With dead ends: 14987 [2021-12-16 22:57:34,553 INFO L226 Difference]: Without dead ends: 14985 [2021-12-16 22:57:34,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=777, Invalid=6195, Unknown=0, NotChecked=0, Total=6972 [2021-12-16 22:57:34,565 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 262 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 3466 mSolverCounterSat, 939 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 4405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 939 IncrementalHoareTripleChecker+Valid, 3466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:34,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 1686 Invalid, 4405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [939 Valid, 3466 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-16 22:57:34,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14985 states. [2021-12-16 22:57:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14985 to 5809. [2021-12-16 22:57:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 4116 states have (on average 1.4834791059280856) internal successors, (6106), 4116 states have internal predecessors, (6106), 1676 states have call successors, (1676), 16 states have call predecessors, (1676), 16 states have return successors, (1676), 1676 states have call predecessors, (1676), 1676 states have call successors, (1676) [2021-12-16 22:57:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 9458 transitions. [2021-12-16 22:57:35,173 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 9458 transitions. Word has length 59 [2021-12-16 22:57:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:35,173 INFO L470 AbstractCegarLoop]: Abstraction has 5809 states and 9458 transitions. [2021-12-16 22:57:35,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-16 22:57:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 9458 transitions. [2021-12-16 22:57:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 22:57:35,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:35,176 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:35,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:35,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:35,391 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash 58433497, now seen corresponding path program 1 times [2021-12-16 22:57:35,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:35,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116423168] [2021-12-16 22:57:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:35,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:35,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:35,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:35,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:35,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:35,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:35,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:35,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116423168] [2021-12-16 22:57:35,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116423168] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:35,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493226636] [2021-12-16 22:57:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:35,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:35,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:35,526 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) [2021-12-16 22:57:35,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:57:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:35,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 22:57:35,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:35,735 INFO L388 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 [2021-12-16 22:57:35,924 INFO L388 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 7 [2021-12-16 22:57:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:35,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:36,078 INFO L388 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 15 [2021-12-16 22:57:36,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:57:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:36,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493226636] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:57:36,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:57:36,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-12-16 22:57:36,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853550762] [2021-12-16 22:57:36,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:36,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 22:57:36,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:36,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 22:57:36,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:57:36,213 INFO L87 Difference]: Start difference. First operand 5809 states and 9458 transitions. Second operand has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 29 states have internal predecessors, (112), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-16 22:57:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:44,023 INFO L93 Difference]: Finished difference Result 19191 states and 30861 transitions. [2021-12-16 22:57:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-12-16 22:57:44,023 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 29 states have internal predecessors, (112), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 59 [2021-12-16 22:57:44,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:44,067 INFO L225 Difference]: With dead ends: 19191 [2021-12-16 22:57:44,068 INFO L226 Difference]: Without dead ends: 19189 [2021-12-16 22:57:44,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11532 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4211, Invalid=26239, Unknown=0, NotChecked=0, Total=30450 [2021-12-16 22:57:44,081 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 1056 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 3812 mSolverCounterSat, 3450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 7262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3450 IncrementalHoareTripleChecker+Valid, 3812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:44,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 1888 Invalid, 7262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3450 Valid, 3812 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-16 22:57:44,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19189 states. [2021-12-16 22:57:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19189 to 2212. [2021-12-16 22:57:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1586 states have (on average 1.4621689785624212) internal successors, (2319), 1589 states have internal predecessors, (2319), 609 states have call successors, (609), 16 states have call predecessors, (609), 16 states have return successors, (609), 606 states have call predecessors, (609), 609 states have call successors, (609) [2021-12-16 22:57:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3537 transitions. [2021-12-16 22:57:44,539 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3537 transitions. Word has length 59 [2021-12-16 22:57:44,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:44,539 INFO L470 AbstractCegarLoop]: Abstraction has 2212 states and 3537 transitions. [2021-12-16 22:57:44,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 29 states have internal predecessors, (112), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-16 22:57:44,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3537 transitions. [2021-12-16 22:57:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 22:57:44,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:44,541 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:57:44,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:44,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 22:57:44,742 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:44,742 INFO L85 PathProgramCache]: Analyzing trace with hash 819831629, now seen corresponding path program 5 times [2021-12-16 22:57:44,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:44,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683800580] [2021-12-16 22:57:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:44,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:44,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:44,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:44,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:44,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:44,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:44,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:44,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683800580] [2021-12-16 22:57:44,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683800580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:44,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514103421] [2021-12-16 22:57:44,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:57:44,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:44,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:44,988 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) [2021-12-16 22:57:44,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 22:57:45,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-16 22:57:45,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:57:45,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 22:57:45,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:45,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:57:45,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514103421] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:57:45,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:57:45,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-12-16 22:57:45,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604693496] [2021-12-16 22:57:45,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:45,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 22:57:45,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:45,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 22:57:45,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:57:45,789 INFO L87 Difference]: Start difference. First operand 2212 states and 3537 transitions. Second operand has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-16 22:57:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:46,318 INFO L93 Difference]: Finished difference Result 2444 states and 3886 transitions. [2021-12-16 22:57:46,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 22:57:46,319 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 63 [2021-12-16 22:57:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:46,324 INFO L225 Difference]: With dead ends: 2444 [2021-12-16 22:57:46,324 INFO L226 Difference]: Without dead ends: 2416 [2021-12-16 22:57:46,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 22:57:46,325 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 232 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:46,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 196 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:57:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-12-16 22:57:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2229. [2021-12-16 22:57:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 1602 states have (on average 1.4525593008739077) internal successors, (2327), 1602 states have internal predecessors, (2327), 610 states have call successors, (610), 16 states have call predecessors, (610), 16 states have return successors, (610), 610 states have call predecessors, (610), 610 states have call successors, (610) [2021-12-16 22:57:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 3547 transitions. [2021-12-16 22:57:46,568 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 3547 transitions. Word has length 63 [2021-12-16 22:57:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:46,568 INFO L470 AbstractCegarLoop]: Abstraction has 2229 states and 3547 transitions. [2021-12-16 22:57:46,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-16 22:57:46,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 3547 transitions. [2021-12-16 22:57:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-16 22:57:46,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:46,572 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 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] [2021-12-16 22:57:46,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:46,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 22:57:46,787 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:46,788 INFO L85 PathProgramCache]: Analyzing trace with hash 374578441, now seen corresponding path program 2 times [2021-12-16 22:57:46,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:46,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013478972] [2021-12-16 22:57:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:46,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:46,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:46,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:46,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:46,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:46,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:46,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:57:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:46,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:57:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:46,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:57:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:46,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 22:57:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:46,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 22:57:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:57:46,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:46,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013478972] [2021-12-16 22:57:46,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013478972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:46,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767154935] [2021-12-16 22:57:46,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:57:46,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:46,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:46,991 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) [2021-12-16 22:57:46,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 22:57:47,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:57:47,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:57:47,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-16 22:57:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:47,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:57:47,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:47,208 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:47,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:47,261 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:47,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:47,314 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:47,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:47,364 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:47,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:47,460 INFO L388 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 24 treesize of output 23 [2021-12-16 22:57:47,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:47,519 INFO L388 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 24 treesize of output 23 [2021-12-16 22:57:47,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:47,576 INFO L388 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 24 treesize of output 23 [2021-12-16 22:57:47,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:47,652 INFO L388 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 24 treesize of output 23 [2021-12-16 22:57:47,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:47,712 INFO L388 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 24 treesize of output 23 [2021-12-16 22:57:47,772 INFO L388 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 [2021-12-16 22:57:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-16 22:57:47,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:47,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767154935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:47,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:57:47,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-16 22:57:47,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665046668] [2021-12-16 22:57:47,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:47,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 22:57:47,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:47,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 22:57:47,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:57:47,984 INFO L87 Difference]: Start difference. First operand 2229 states and 3547 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-16 22:57:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:48,967 INFO L93 Difference]: Finished difference Result 2399 states and 3767 transitions. [2021-12-16 22:57:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 22:57:48,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2021-12-16 22:57:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:48,977 INFO L225 Difference]: With dead ends: 2399 [2021-12-16 22:57:48,977 INFO L226 Difference]: Without dead ends: 2397 [2021-12-16 22:57:48,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 106 SyntacticMatches, 23 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 22:57:48,978 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 127 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:48,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 624 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 795 Invalid, 0 Unknown, 66 Unchecked, 0.4s Time] [2021-12-16 22:57:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-12-16 22:57:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1575. [2021-12-16 22:57:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1136 states have (on average 1.4357394366197183) internal successors, (1631), 1136 states have internal predecessors, (1631), 421 states have call successors, (421), 17 states have call predecessors, (421), 17 states have return successors, (421), 421 states have call predecessors, (421), 421 states have call successors, (421) [2021-12-16 22:57:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2473 transitions. [2021-12-16 22:57:49,142 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2473 transitions. Word has length 75 [2021-12-16 22:57:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:49,142 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 2473 transitions. [2021-12-16 22:57:49,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-16 22:57:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2473 transitions. [2021-12-16 22:57:49,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 22:57:49,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:49,145 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 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, 1, 1] [2021-12-16 22:57:49,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:49,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 22:57:49,362 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:49,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:49,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1525924609, now seen corresponding path program 2 times [2021-12-16 22:57:49,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:49,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658459802] [2021-12-16 22:57:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:49,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:49,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:49,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:49,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:49,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:49,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:49,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:57:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:49,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:57:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:49,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:57:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:49,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 22:57:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:49,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 22:57:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:57:49,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658459802] [2021-12-16 22:57:49,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658459802] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:49,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264160447] [2021-12-16 22:57:49,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:57:49,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:49,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:49,596 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) [2021-12-16 22:57:49,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 22:57:49,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:57:49,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:57:49,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-16 22:57:49,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:49,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:57:49,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:49,822 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:49,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:49,876 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:49,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:49,971 INFO L388 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 29 treesize of output 28 [2021-12-16 22:57:50,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:50,043 INFO L388 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 26 treesize of output 25 [2021-12-16 22:57:50,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:50,094 INFO L388 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 26 treesize of output 25 [2021-12-16 22:57:50,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:50,156 INFO L388 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 26 treesize of output 25 [2021-12-16 22:57:50,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:50,207 INFO L388 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 26 treesize of output 25 [2021-12-16 22:57:50,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:57:50,259 INFO L388 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 26 treesize of output 25 [2021-12-16 22:57:50,345 INFO L388 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 [2021-12-16 22:57:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-16 22:57:50,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:57:50,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264160447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:50,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:57:50,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-16 22:57:50,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25552179] [2021-12-16 22:57:50,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:57:50,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 22:57:50,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:57:50,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 22:57:50,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-16 22:57:50,533 INFO L87 Difference]: Start difference. First operand 1575 states and 2473 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-16 22:57:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:57:51,419 INFO L93 Difference]: Finished difference Result 1736 states and 2678 transitions. [2021-12-16 22:57:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-16 22:57:51,419 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 79 [2021-12-16 22:57:51,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:57:51,423 INFO L225 Difference]: With dead ends: 1736 [2021-12-16 22:57:51,423 INFO L226 Difference]: Without dead ends: 1734 [2021-12-16 22:57:51,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 114 SyntacticMatches, 20 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=1507, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 22:57:51,425 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 210 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:57:51,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 531 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 748 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2021-12-16 22:57:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-12-16 22:57:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 619. [2021-12-16 22:57:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 454 states have (on average 1.394273127753304) internal successors, (633), 455 states have internal predecessors, (633), 154 states have call successors, (154), 10 states have call predecessors, (154), 10 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2021-12-16 22:57:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 941 transitions. [2021-12-16 22:57:51,602 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 941 transitions. Word has length 79 [2021-12-16 22:57:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:57:51,602 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 941 transitions. [2021-12-16 22:57:51,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-16 22:57:51,603 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 941 transitions. [2021-12-16 22:57:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 22:57:51,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:57:51,604 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 2, 2, 2, 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] [2021-12-16 22:57:51,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 22:57:51,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 22:57:51,819 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:57:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:57:51,820 INFO L85 PathProgramCache]: Analyzing trace with hash -375078701, now seen corresponding path program 6 times [2021-12-16 22:57:51,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:57:51,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871634759] [2021-12-16 22:57:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:57:51,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:57:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:51,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:57:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:51,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:57:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:51,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:57:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:51,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:57:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:51,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:57:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:51,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 22:57:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:51,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 22:57:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:51,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:57:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:51,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 22:57:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:51,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 22:57:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:57:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:57:51,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:57:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871634759] [2021-12-16 22:57:51,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871634759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:57:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099322183] [2021-12-16 22:57:51,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:57:51,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:57:51,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:57:51,977 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) [2021-12-16 22:57:51,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 22:57:52,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-16 22:57:52,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:57:52,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 22:57:52,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:57:52,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:58:00,326 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:58:00,326 INFO L388 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 30 treesize of output 29 [2021-12-16 22:58:08,416 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:58:08,416 INFO L388 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 30 treesize of output 29 [2021-12-16 22:58:16,490 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:58:16,490 INFO L388 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 30 treesize of output 29 [2021-12-16 22:58:24,557 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:58:24,557 INFO L388 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 [2021-12-16 22:58:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 22:58:24,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:58:26,920 INFO L388 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 18 treesize of output 16 [2021-12-16 22:58:26,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-16 22:58:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:58:27,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099322183] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:58:27,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:58:27,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 27 [2021-12-16 22:58:27,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381543871] [2021-12-16 22:58:27,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:58:27,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 22:58:27,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:58:27,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 22:58:27,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=593, Unknown=5, NotChecked=0, Total=702 [2021-12-16 22:58:27,005 INFO L87 Difference]: Start difference. First operand 619 states and 941 transitions. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-16 23:01:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:01:24,931 INFO L93 Difference]: Finished difference Result 7246 states and 11382 transitions. [2021-12-16 23:01:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-12-16 23:01:24,932 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 95 [2021-12-16 23:01:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:01:24,942 INFO L225 Difference]: With dead ends: 7246 [2021-12-16 23:01:24,943 INFO L226 Difference]: Without dead ends: 7244 [2021-12-16 23:01:24,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 193 SyntacticMatches, 23 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9569 ImplicationChecksByTransitivity, 206.5s TimeCoverageRelationStatistics Valid=2121, Invalid=19841, Unknown=90, NotChecked=0, Total=22052 [2021-12-16 23:01:24,946 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 458 mSDsluCounter, 2417 mSDsCounter, 0 mSdLazyCounter, 7541 mSolverCounterSat, 1460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 3025 SdHoareTripleChecker+Invalid, 9906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1460 IncrementalHoareTripleChecker+Valid, 7541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 905 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-16 23:01:24,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 3025 Invalid, 9906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1460 Valid, 7541 Invalid, 0 Unknown, 905 Unchecked, 3.7s Time] [2021-12-16 23:01:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7244 states. [2021-12-16 23:01:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7244 to 1537. [2021-12-16 23:01:25,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1114 states have (on average 1.4425493716337523) internal successors, (1607), 1115 states have internal predecessors, (1607), 410 states have call successors, (410), 12 states have call predecessors, (410), 12 states have return successors, (410), 409 states have call predecessors, (410), 410 states have call successors, (410) [2021-12-16 23:01:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2427 transitions. [2021-12-16 23:01:25,423 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2427 transitions. Word has length 95 [2021-12-16 23:01:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:01:25,424 INFO L470 AbstractCegarLoop]: Abstraction has 1537 states and 2427 transitions. [2021-12-16 23:01:25,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-16 23:01:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2427 transitions. [2021-12-16 23:01:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 23:01:25,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:01:25,426 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 2, 2, 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, 1] [2021-12-16 23:01:25,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 23:01:25,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:25,645 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:01:25,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:01:25,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1891302485, now seen corresponding path program 1 times [2021-12-16 23:01:25,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:01:25,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646379994] [2021-12-16 23:01:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:25,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:01:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 23:01:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 23:01:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 23:01:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 23:01:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 23:01:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 23:01:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 23:01:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 23:01:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 23:01:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 23:01:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 23:01:25,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:01:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646379994] [2021-12-16 23:01:25,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646379994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:01:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48986762] [2021-12-16 23:01:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:01:25,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:01:25,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:01:25,827 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) [2021-12-16 23:01:25,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 23:01:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:01:25,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 23:01:25,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:01:26,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 23:01:26,169 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:26,169 INFO L388 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 29 treesize of output 28 [2021-12-16 23:01:26,230 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:26,230 INFO L388 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 29 treesize of output 28 [2021-12-16 23:01:26,296 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:01:26,296 INFO L388 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 29 treesize of output 28 [2021-12-16 23:01:26,358 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 23:01:26,358 INFO L388 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 [2021-12-16 23:01:26,608 INFO L388 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 7 [2021-12-16 23:01:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 23:01:26,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:01:28,949 INFO L388 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 15 [2021-12-16 23:01:28,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 23:01:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 23:01:29,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48986762] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:01:29,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:01:29,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2021-12-16 23:01:29,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434454248] [2021-12-16 23:01:29,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:01:29,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-16 23:01:29,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:01:29,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-16 23:01:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1129, Unknown=1, NotChecked=0, Total=1260 [2021-12-16 23:01:29,124 INFO L87 Difference]: Start difference. First operand 1537 states and 2427 transitions. Second operand has 36 states, 36 states have (on average 4.5) internal successors, (162), 36 states have internal predecessors, (162), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-16 23:04:06,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:04:06,619 INFO L93 Difference]: Finished difference Result 10537 states and 16942 transitions. [2021-12-16 23:04:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-12-16 23:04:06,620 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.5) internal successors, (162), 36 states have internal predecessors, (162), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 95 [2021-12-16 23:04:06,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:04:06,637 INFO L225 Difference]: With dead ends: 10537 [2021-12-16 23:04:06,637 INFO L226 Difference]: Without dead ends: 10535 [2021-12-16 23:04:06,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 184 SyntacticMatches, 13 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15849 ImplicationChecksByTransitivity, 151.7s TimeCoverageRelationStatistics Valid=4685, Invalid=34248, Unknown=73, NotChecked=0, Total=39006 [2021-12-16 23:04:06,642 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 1847 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 8109 mSolverCounterSat, 6166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1868 SdHoareTripleChecker+Valid, 3189 SdHoareTripleChecker+Invalid, 15199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6166 IncrementalHoareTripleChecker+Valid, 8109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-16 23:04:06,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1868 Valid, 3189 Invalid, 15199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6166 Valid, 8109 Invalid, 0 Unknown, 924 Unchecked, 5.5s Time] [2021-12-16 23:04:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10535 states. [2021-12-16 23:04:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10535 to 1877. [2021-12-16 23:04:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1350 states have (on average 1.451111111111111) internal successors, (1959), 1355 states have internal predecessors, (1959), 512 states have call successors, (512), 14 states have call predecessors, (512), 14 states have return successors, (512), 507 states have call predecessors, (512), 512 states have call successors, (512) [2021-12-16 23:04:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 2983 transitions. [2021-12-16 23:04:07,238 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 2983 transitions. Word has length 95 [2021-12-16 23:04:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:04:07,238 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 2983 transitions. [2021-12-16 23:04:07,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.5) internal successors, (162), 36 states have internal predecessors, (162), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-16 23:04:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 2983 transitions. [2021-12-16 23:04:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-16 23:04:07,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:04:07,241 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 6, 6, 6, 2, 2, 2, 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] [2021-12-16 23:04:07,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 23:04:07,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 23:04:07,460 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:04:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:04:07,460 INFO L85 PathProgramCache]: Analyzing trace with hash 500947145, now seen corresponding path program 7 times [2021-12-16 23:04:07,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:04:07,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144043614] [2021-12-16 23:04:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:04:07,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:04:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 23:04:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 23:04:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 23:04:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 23:04:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 23:04:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 23:04:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 23:04:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 23:04:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 23:04:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 23:04:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 23:04:07,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:04:07,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144043614] [2021-12-16 23:04:07,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144043614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:04:07,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440975044] [2021-12-16 23:04:07,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 23:04:07,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:04:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:04:07,621 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) [2021-12-16 23:04:07,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 23:04:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:07,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-16 23:04:07,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:04:07,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 23:04:07,830 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:04:07,830 INFO L388 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 30 treesize of output 29 [2021-12-16 23:04:07,868 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:04:07,868 INFO L388 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 30 treesize of output 29 [2021-12-16 23:04:07,901 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:04:07,902 INFO L388 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 30 treesize of output 29 [2021-12-16 23:04:08,106 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:04:08,109 INFO L388 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 46 treesize of output 24 [2021-12-16 23:04:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 23:04:08,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:04:08,247 INFO L388 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 15 [2021-12-16 23:04:08,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 23:04:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 23:04:08,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440975044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:04:08,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:04:08,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2021-12-16 23:04:08,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848105247] [2021-12-16 23:04:08,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:04:08,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 23:04:08,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:04:08,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 23:04:08,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-12-16 23:04:08,332 INFO L87 Difference]: Start difference. First operand 1877 states and 2983 transitions. Second operand has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-16 23:04:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:04:30,407 INFO L93 Difference]: Finished difference Result 31765 states and 51459 transitions. [2021-12-16 23:04:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 320 states. [2021-12-16 23:04:30,407 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 99 [2021-12-16 23:04:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:04:30,471 INFO L225 Difference]: With dead ends: 31765 [2021-12-16 23:04:30,471 INFO L226 Difference]: Without dead ends: 31763 [2021-12-16 23:04:30,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 205 SyntacticMatches, 9 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46289 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6241, Invalid=97121, Unknown=0, NotChecked=0, Total=103362 [2021-12-16 23:04:30,484 INFO L933 BasicCegarLoop]: 1183 mSDtfsCounter, 690 mSDsluCounter, 4969 mSDsCounter, 0 mSdLazyCounter, 14998 mSolverCounterSat, 3883 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 6152 SdHoareTripleChecker+Invalid, 18881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3883 IncrementalHoareTripleChecker+Valid, 14998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-12-16 23:04:30,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 6152 Invalid, 18881 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3883 Valid, 14998 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-12-16 23:04:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31763 states. [2021-12-16 23:04:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31763 to 4735. [2021-12-16 23:04:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 3392 states have (on average 1.4705188679245282) internal successors, (4988), 3397 states have internal predecessors, (4988), 1328 states have call successors, (1328), 14 states have call predecessors, (1328), 14 states have return successors, (1328), 1323 states have call predecessors, (1328), 1328 states have call successors, (1328) [2021-12-16 23:04:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 7644 transitions. [2021-12-16 23:04:32,300 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 7644 transitions. Word has length 99 [2021-12-16 23:04:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:04:32,300 INFO L470 AbstractCegarLoop]: Abstraction has 4735 states and 7644 transitions. [2021-12-16 23:04:32,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-16 23:04:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 7644 transitions. [2021-12-16 23:04:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-16 23:04:32,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:04:32,304 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 6, 6, 6, 2, 2, 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, 1] [2021-12-16 23:04:32,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 23:04:32,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 23:04:32,521 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:04:32,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:04:32,522 INFO L85 PathProgramCache]: Analyzing trace with hash 485428427, now seen corresponding path program 1 times [2021-12-16 23:04:32,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:04:32,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10409668] [2021-12-16 23:04:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:04:32,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:04:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 23:04:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 23:04:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 23:04:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 23:04:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 23:04:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 23:04:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 23:04:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 23:04:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 23:04:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 23:04:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 23:04:32,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:04:32,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10409668] [2021-12-16 23:04:32,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10409668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:04:32,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466269915] [2021-12-16 23:04:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:04:32,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:04:32,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:04:32,721 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) [2021-12-16 23:04:32,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 23:04:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:04:32,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 23:04:32,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:04:33,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 23:04:33,221 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:04:33,221 INFO L388 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 29 treesize of output 28 [2021-12-16 23:04:33,284 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:04:33,284 INFO L388 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 29 treesize of output 28 [2021-12-16 23:04:33,346 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 23:04:33,346 INFO L388 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 [2021-12-16 23:04:33,624 INFO L388 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 7 [2021-12-16 23:04:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 63 proven. 91 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-16 23:04:33,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:04:33,968 INFO L388 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 15 [2021-12-16 23:04:33,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 23:04:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 23:04:34,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466269915] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:04:34,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:04:34,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2021-12-16 23:04:34,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267772579] [2021-12-16 23:04:34,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:04:34,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 23:04:34,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:04:34,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 23:04:34,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 23:04:34,172 INFO L87 Difference]: Start difference. First operand 4735 states and 7644 transitions. Second operand has 39 states, 39 states have (on average 4.461538461538462) internal successors, (174), 39 states have internal predecessors, (174), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-16 23:10:19,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 23:10:19,022 INFO L93 Difference]: Finished difference Result 30884 states and 50023 transitions. [2021-12-16 23:10:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 301 states. [2021-12-16 23:10:19,023 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.461538461538462) internal successors, (174), 39 states have internal predecessors, (174), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 99 [2021-12-16 23:10:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 23:10:19,079 INFO L225 Difference]: With dead ends: 30884 [2021-12-16 23:10:19,080 INFO L226 Difference]: Without dead ends: 30882 [2021-12-16 23:10:19,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 196 SyntacticMatches, 11 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45988 ImplicationChecksByTransitivity, 327.2s TimeCoverageRelationStatistics Valid=11161, Invalid=92686, Unknown=159, NotChecked=0, Total=104006 [2021-12-16 23:10:19,091 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 1856 mSDsluCounter, 3735 mSDsCounter, 0 mSdLazyCounter, 13540 mSolverCounterSat, 7498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 4493 SdHoareTripleChecker+Invalid, 22437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7498 IncrementalHoareTripleChecker+Valid, 13540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1399 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-12-16 23:10:19,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1878 Valid, 4493 Invalid, 22437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7498 Valid, 13540 Invalid, 0 Unknown, 1399 Unchecked, 8.7s Time] [2021-12-16 23:10:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30882 states. [2021-12-16 23:10:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30882 to 4729. [2021-12-16 23:10:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4729 states, 3392 states have (on average 1.4693396226415094) internal successors, (4984), 3397 states have internal predecessors, (4984), 1318 states have call successors, (1318), 18 states have call predecessors, (1318), 18 states have return successors, (1318), 1313 states have call predecessors, (1318), 1318 states have call successors, (1318) [2021-12-16 23:10:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4729 states to 4729 states and 7620 transitions. [2021-12-16 23:10:20,746 INFO L78 Accepts]: Start accepts. Automaton has 4729 states and 7620 transitions. Word has length 99 [2021-12-16 23:10:20,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 23:10:20,747 INFO L470 AbstractCegarLoop]: Abstraction has 4729 states and 7620 transitions. [2021-12-16 23:10:20,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.461538461538462) internal successors, (174), 39 states have internal predecessors, (174), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-16 23:10:20,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4729 states and 7620 transitions. [2021-12-16 23:10:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 23:10:20,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 23:10:20,751 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 7, 7, 7, 2, 2, 2, 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] [2021-12-16 23:10:20,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 23:10:20,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:10:20,968 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 23:10:20,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 23:10:20,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1338374721, now seen corresponding path program 8 times [2021-12-16 23:10:20,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 23:10:20,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136000126] [2021-12-16 23:10:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 23:10:20,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 23:10:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 23:10:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 23:10:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 23:10:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 23:10:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 23:10:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 23:10:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 23:10:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 23:10:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 23:10:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 23:10:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 23:10:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 23:10:21,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 23:10:21,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136000126] [2021-12-16 23:10:21,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136000126] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 23:10:21,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355102270] [2021-12-16 23:10:21,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 23:10:21,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 23:10:21,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 23:10:21,132 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) [2021-12-16 23:10:21,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 23:10:21,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 23:10:21,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 23:10:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 23:10:21,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 23:10:21,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 23:10:21,395 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:10:21,395 INFO L388 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 30 treesize of output 29 [2021-12-16 23:10:21,426 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 23:10:21,426 INFO L388 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 30 treesize of output 29 [2021-12-16 23:10:21,684 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 23:10:21,684 INFO L388 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 46 treesize of output 24 [2021-12-16 23:10:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 23:10:21,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 23:10:21,814 INFO L388 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 15 [2021-12-16 23:10:21,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 23:10:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 23:10:21,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355102270] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 23:10:21,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 23:10:21,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 23 [2021-12-16 23:10:21,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583093530] [2021-12-16 23:10:21,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 23:10:21,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 23:10:21,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 23:10:21,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 23:10:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-16 23:10:21,908 INFO L87 Difference]: Start difference. First operand 4729 states and 7620 transitions. Second operand has 23 states, 23 states have (on average 4.565217391304348) internal successors, (105), 23 states have internal predecessors, (105), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Killed by 15