./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array8_pattern.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-patterns/array8_pattern.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 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 00:54:03,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 00:54:03,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 00:54:03,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 00:54:03,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 00:54:03,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 00:54:03,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 00:54:03,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 00:54:03,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 00:54:03,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 00:54:03,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 00:54:03,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 00:54:03,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 00:54:03,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 00:54:03,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 00:54:03,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 00:54:03,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 00:54:03,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 00:54:03,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 00:54:03,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 00:54:03,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 00:54:03,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 00:54:03,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 00:54:03,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 00:54:03,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 00:54:03,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 00:54:03,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 00:54:03,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 00:54:03,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 00:54:03,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 00:54:03,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 00:54:03,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 00:54:03,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 00:54:03,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 00:54:03,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 00:54:03,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 00:54:03,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 00:54:03,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 00:54:03,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 00:54:03,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 00:54:03,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 00:54:03,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 00:54:03,612 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 00:54:03,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 00:54:03,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 00:54:03,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 00:54:03,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 00:54:03,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 00:54:03,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 00:54:03,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 00:54:03,615 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 00:54:03,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 00:54:03,616 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 00:54:03,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 00:54:03,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 00:54:03,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 00:54:03,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 00:54:03,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 00:54:03,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 00:54:03,617 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 00:54:03,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 00:54:03,617 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 00:54:03,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 00:54:03,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 00:54:03,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 00:54:03,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 00:54:03,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:54:03,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 00:54:03,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 00:54:03,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 00:54:03,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 00:54:03,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 00:54:03,620 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 00:54:03,620 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 00:54:03,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 00:54:03,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 00:54:03,621 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 [2021-12-17 00:54:03,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:54:03,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:54:03,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:54:03,836 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:54:03,837 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:54:03,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array8_pattern.c [2021-12-17 00:54:03,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/356fd47fe/e34d5f10f7c14ec3b9767ce131851497/FLAGf797f78ee [2021-12-17 00:54:04,287 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:54:04,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c [2021-12-17 00:54:04,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/356fd47fe/e34d5f10f7c14ec3b9767ce131851497/FLAGf797f78ee [2021-12-17 00:54:04,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/356fd47fe/e34d5f10f7c14ec3b9767ce131851497 [2021-12-17 00:54:04,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:54:04,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:54:04,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:54:04,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:54:04,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:54:04,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:04,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f2ee14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04, skipping insertion in model container [2021-12-17 00:54:04,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:04,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:54:04,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:54:04,857 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-patterns/array8_pattern.c[1321,1334] [2021-12-17 00:54:04,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:54:04,888 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:54:04,901 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-patterns/array8_pattern.c[1321,1334] [2021-12-17 00:54:04,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:54:04,930 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:54:04,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04 WrapperNode [2021-12-17 00:54:04,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:54:04,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:54:04,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:54:04,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:54:04,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:04,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:04,966 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-12-17 00:54:04,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:54:04,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:54:04,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:54:04,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:54:04,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:04,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:04,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:04,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:04,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:04,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:04,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:05,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:54:05,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:54:05,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:54:05,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:54:05,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04" (1/1) ... [2021-12-17 00:54:05,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:54:05,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:54:05,031 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) [2021-12-17 00:54:05,055 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 [2021-12-17 00:54:05,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:54:05,070 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 00:54:05,070 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 00:54:05,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 00:54:05,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:54:05,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 00:54:05,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:54:05,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:54:05,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 00:54:05,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:54:05,126 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:54:05,127 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:54:05,257 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:54:05,262 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:54:05,263 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 00:54:05,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:54:05 BoogieIcfgContainer [2021-12-17 00:54:05,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:54:05,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:54:05,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:54:05,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:54:05,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:54:04" (1/3) ... [2021-12-17 00:54:05,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62923961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:54:05, skipping insertion in model container [2021-12-17 00:54:05,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:54:04" (2/3) ... [2021-12-17 00:54:05,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62923961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:54:05, skipping insertion in model container [2021-12-17 00:54:05,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:54:05" (3/3) ... [2021-12-17 00:54:05,271 INFO L111 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2021-12-17 00:54:05,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:54:05,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:54:05,316 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:54:05,322 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 [2021-12-17 00:54:05,323 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:54:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:54:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 00:54:05,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:54:05,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:54:05,344 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:54:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:54:05,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1127586545, now seen corresponding path program 1 times [2021-12-17 00:54:05,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:54:05,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997987965] [2021-12-17 00:54:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:54:05,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:54:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:54:05,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:54:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:54:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:54:05,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:54:05,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997987965] [2021-12-17 00:54:05,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997987965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:54:05,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:54:05,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:54:05,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105769504] [2021-12-17 00:54:05,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:54:05,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:54:05,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:54:05,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:54:05,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:54:05,586 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:54:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:54:05,613 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-12-17 00:54:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:54:05,615 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-17 00:54:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:54:05,621 INFO L225 Difference]: With dead ends: 53 [2021-12-17 00:54:05,621 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 00:54:05,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:54:05,629 INFO L933 BasicCegarLoop]: 32 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, 32 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 [2021-12-17 00:54:05,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:54:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 00:54:05,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-17 00:54:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:54:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-17 00:54:05,678 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-12-17 00:54:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:54:05,679 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-17 00:54:05,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:54:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-17 00:54:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 00:54:05,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:54:05,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:54:05,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 00:54:05,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:54:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:54:05,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1008571545, now seen corresponding path program 1 times [2021-12-17 00:54:05,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:54:05,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271319456] [2021-12-17 00:54:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:54:05,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:54:05,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:54:05,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142421234] [2021-12-17 00:54:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:54:05,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:54:05,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:54:05,744 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) [2021-12-17 00:54:05,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 00:54:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:54:05,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:54:05,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:54:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:54:05,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:54:05,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:54:05,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271319456] [2021-12-17 00:54:05,972 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:54:05,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142421234] [2021-12-17 00:54:05,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142421234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:54:05,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:54:05,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 00:54:05,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788501570] [2021-12-17 00:54:05,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:54:05,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 00:54:05,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:54:05,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 00:54:05,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 00:54:05,982 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:54:06,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:54:06,074 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-12-17 00:54:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 00:54:06,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-12-17 00:54:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:54:06,075 INFO L225 Difference]: With dead ends: 50 [2021-12-17 00:54:06,075 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 00:54:06,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-17 00:54:06,077 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:54:06,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 60 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:54:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 00:54:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-12-17 00:54:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:54:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-17 00:54:06,083 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2021-12-17 00:54:06,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:54:06,084 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-17 00:54:06,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:54:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-17 00:54:06,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 00:54:06,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:54:06,085 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 00:54:06,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:54:06,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:54:06,309 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:54:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:54:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1890411897, now seen corresponding path program 1 times [2021-12-17 00:54:06,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:54:06,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399917842] [2021-12-17 00:54:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:54:06,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:54:06,334 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:54:06,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368937] [2021-12-17 00:54:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:54:06,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:54:06,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:54:06,336 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) [2021-12-17 00:54:06,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 00:54:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:54:06,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 00:54:06,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:54:06,484 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 10 treesize of output 8 [2021-12-17 00:54:06,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:54:06,527 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 18 treesize of output 18 [2021-12-17 00:54:06,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:54:06,961 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 [2021-12-17 00:54:07,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:54:07,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2021-12-17 00:54:07,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:54:07,302 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-17 00:54:07,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 15 [2021-12-17 00:54:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:54:07,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:54:08,278 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#array1~0#1.offset| Int) (v_ArrVal_61 Int)) (or (<= (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |ULTIMATE.start_main_~#array1~0#1.offset| (* |c_ULTIMATE.start_main_~index~0#1| 4)) v_ArrVal_61))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array2~0#1.base|) |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 |ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)) (div (+ c_~ARR_SIZE~0 1) 2)) (< (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|) v_ArrVal_61))) is different from false [2021-12-17 00:54:12,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:54:12,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399917842] [2021-12-17 00:54:12,489 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:54:12,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368937] [2021-12-17 00:54:12,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:54:12,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:54:12,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-17 00:54:12,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738211942] [2021-12-17 00:54:12,490 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:54:12,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:54:12,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:54:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:54:12,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=375, Unknown=2, NotChecked=40, Total=506 [2021-12-17 00:54:12,492 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:54:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:54:12,760 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-12-17 00:54:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:54:12,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-12-17 00:54:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:54:12,763 INFO L225 Difference]: With dead ends: 70 [2021-12-17 00:54:12,763 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 00:54:12,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=155, Invalid=549, Unknown=2, NotChecked=50, Total=756 [2021-12-17 00:54:12,764 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:54:12,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 148 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 91 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-12-17 00:54:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 00:54:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-17 00:54:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:54:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-12-17 00:54:12,772 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 29 [2021-12-17 00:54:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:54:12,772 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-12-17 00:54:12,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:54:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-12-17 00:54:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 00:54:12,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:54:12,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:54:12,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:54:12,998 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,SelfDestructingSolverStorable2 [2021-12-17 00:54:12,999 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:54:12,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:54:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash -32099493, now seen corresponding path program 2 times [2021-12-17 00:54:12,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:54:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211843727] [2021-12-17 00:54:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:54:13,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:54:13,026 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:54:13,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774747965] [2021-12-17 00:54:13,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:54:13,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:54:13,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:54:13,028 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) [2021-12-17 00:54:13,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 00:54:13,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:54:13,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:54:13,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:54:13,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:54:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:54:13,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:54:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:54:13,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:54:13,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211843727] [2021-12-17 00:54:13,213 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:54:13,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774747965] [2021-12-17 00:54:13,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774747965] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:54:13,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:54:13,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-17 00:54:13,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80266864] [2021-12-17 00:54:13,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:54:13,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 00:54:13,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:54:13,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 00:54:13,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-17 00:54:13,216 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:54:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:54:13,302 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-12-17 00:54:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 00:54:13,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-17 00:54:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:54:13,316 INFO L225 Difference]: With dead ends: 61 [2021-12-17 00:54:13,316 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 00:54:13,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:54:13,319 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:54:13,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 110 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:54:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 00:54:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-12-17 00:54:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:54:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-17 00:54:13,334 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 31 [2021-12-17 00:54:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:54:13,334 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-17 00:54:13,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:54:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-17 00:54:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 00:54:13,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:54:13,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:54:13,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:54:13,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:54:13,560 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:54:13,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:54:13,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1857874167, now seen corresponding path program 3 times [2021-12-17 00:54:13,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:54:13,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315951960] [2021-12-17 00:54:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:54:13,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:54:13,582 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:54:13,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947466545] [2021-12-17 00:54:13,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:54:13,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:54:13,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:54:13,584 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) [2021-12-17 00:54:13,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 00:54:13,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 00:54:13,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:54:13,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:54:13,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:54:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:54:13,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:54:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:54:13,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:54:13,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315951960] [2021-12-17 00:54:13,838 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:54:13,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947466545] [2021-12-17 00:54:13,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947466545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:54:13,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:54:13,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-17 00:54:13,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047896554] [2021-12-17 00:54:13,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:54:13,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 00:54:13,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:54:13,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 00:54:13,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-17 00:54:13,842 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:54:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:54:13,935 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-17 00:54:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 00:54:13,935 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-17 00:54:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:54:13,936 INFO L225 Difference]: With dead ends: 39 [2021-12-17 00:54:13,936 INFO L226 Difference]: Without dead ends: 35 [2021-12-17 00:54:13,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:54:13,937 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:54:13,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 91 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:54:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-17 00:54:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-12-17 00:54:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:54:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-12-17 00:54:13,941 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 31 [2021-12-17 00:54:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:54:13,942 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-12-17 00:54:13,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:54:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-12-17 00:54:13,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 00:54:13,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:54:13,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:54:13,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:54:14,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:54:14,147 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:54:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:54:14,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1236086951, now seen corresponding path program 4 times [2021-12-17 00:54:14,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:54:14,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377151881] [2021-12-17 00:54:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:54:14,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:54:14,168 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:54:14,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788588478] [2021-12-17 00:54:14,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:54:14,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:54:14,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:54:14,170 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) [2021-12-17 00:54:14,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 00:54:14,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:54:14,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:54:14,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-17 00:54:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:54:14,274 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 10 treesize of output 8 [2021-12-17 00:54:14,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:54:14,302 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 18 treesize of output 18 [2021-12-17 00:54:14,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:54:14,363 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-17 00:54:14,363 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 1 case distinctions, treesize of input 52 treesize of output 38 [2021-12-17 00:54:17,365 INFO L354 Elim1Store]: treesize reduction 293, result has 33.0 percent of original size [2021-12-17 00:54:17,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 84 treesize of output 196 [2021-12-17 00:54:23,841 INFO L354 Elim1Store]: treesize reduction 447, result has 32.2 percent of original size [2021-12-17 00:54:23,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 151 treesize of output 314 [2021-12-17 00:55:44,957 INFO L354 Elim1Store]: treesize reduction 691, result has 33.7 percent of original size [2021-12-17 00:55:44,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 2 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 54 case distinctions, treesize of input 301 treesize of output 485 [2021-12-17 00:55:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:55:46,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:55:57,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:55:57,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377151881] [2021-12-17 00:55:57,838 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:55:57,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788588478] [2021-12-17 00:55:57,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788588478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:55:57,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:55:57,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-17 00:55:57,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577107127] [2021-12-17 00:55:57,838 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:55:57,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 00:55:57,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:55:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 00:55:57,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=965, Unknown=7, NotChecked=0, Total=1122 [2021-12-17 00:55:57,840 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:55:57,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:55:57,953 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-12-17 00:55:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 00:55:57,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-12-17 00:55:57,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:55:57,956 INFO L225 Difference]: With dead ends: 59 [2021-12-17 00:55:57,956 INFO L226 Difference]: Without dead ends: 55 [2021-12-17 00:55:57,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=161, Invalid=1022, Unknown=7, NotChecked=0, Total=1190 [2021-12-17 00:55:57,957 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:55:57,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 266 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2021-12-17 00:55:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-17 00:55:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2021-12-17 00:55:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:55:57,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-12-17 00:55:57,969 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 33 [2021-12-17 00:55:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:55:57,970 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-12-17 00:55:57,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:55:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-12-17 00:55:57,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 00:55:57,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:55:57,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:55:58,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:55:58,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:55:58,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:55:58,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:55:58,194 INFO L85 PathProgramCache]: Analyzing trace with hash -977921513, now seen corresponding path program 1 times [2021-12-17 00:55:58,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:55:58,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52832267] [2021-12-17 00:55:58,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:55:58,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:55:58,215 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:55:58,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861001034] [2021-12-17 00:55:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:55:58,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:55:58,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:55:58,217 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) [2021-12-17 00:55:58,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 00:55:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:55:58,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-17 00:55:58,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:55:58,301 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 10 treesize of output 8 [2021-12-17 00:55:58,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:55:58,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:55:58,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-17 00:55:58,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:55:58,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:55:58,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:55:58,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:55:58,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-12-17 00:55:58,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:55:58,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:55:58,871 INFO L354 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2021-12-17 00:55:58,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 68 [2021-12-17 00:56:00,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:00,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:00,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:00,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:00,226 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-12-17 00:56:00,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 96 [2021-12-17 00:56:01,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:01,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:56:01,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 76 [2021-12-17 00:56:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:56:01,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:04,751 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_252 Int) (|aux_mod_ULTIMATE.start_main_~index~0#1_40| Int) (v_ArrVal_250 Int) (|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (let ((.cse0 (+ |aux_mod_ULTIMATE.start_main_~index~0#1_40| (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|)))) (or (<= c_~ARR_SIZE~0 .cse0) (< |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0) (< .cse0 0) (< (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|) v_ArrVal_250) (= 0 |aux_mod_ULTIMATE.start_main_~index~0#1_40|) (< (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|) v_ArrVal_252) (<= (let ((.cse4 (* |aux_mod_ULTIMATE.start_main_~index~0#1_40| 4)) (.cse5 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse5) v_ArrVal_250)))) (let ((.cse1 (store (select .cse3 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse5) v_ArrVal_252))) (let ((.cse2 (select (store .cse3 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1|))))) (div (+ c_~ARR_SIZE~0 1) 2)) (<= 2 |aux_mod_ULTIMATE.start_main_~index~0#1_40|)))) is different from false [2021-12-17 00:56:04,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:04,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52832267] [2021-12-17 00:56:04,754 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:56:04,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861001034] [2021-12-17 00:56:04,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861001034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:04,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:56:04,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-12-17 00:56:04,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919739398] [2021-12-17 00:56:04,755 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:04,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 00:56:04,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:04,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 00:56:04,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=585, Unknown=3, NotChecked=50, Total=756 [2021-12-17 00:56:04,756 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:56:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:05,699 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-12-17 00:56:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 00:56:05,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-12-17 00:56:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:05,700 INFO L225 Difference]: With dead ends: 81 [2021-12-17 00:56:05,700 INFO L226 Difference]: Without dead ends: 77 [2021-12-17 00:56:05,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=4, NotChecked=56, Total=930 [2021-12-17 00:56:05,701 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:05,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 204 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 163 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2021-12-17 00:56:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-17 00:56:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2021-12-17 00:56:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 00:56:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-12-17 00:56:05,710 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 33 [2021-12-17 00:56:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:05,711 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-12-17 00:56:05,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:56:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-12-17 00:56:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 00:56:05,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:05,712 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:05,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:05,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:05,928 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1879614779, now seen corresponding path program 5 times [2021-12-17 00:56:05,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:05,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481184628] [2021-12-17 00:56:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:05,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:05,943 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:56:05,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576546797] [2021-12-17 00:56:05,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:56:05,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:05,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:05,944 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) [2021-12-17 00:56:05,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 00:56:05,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 00:56:05,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:06,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:56:06,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:56:06,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:56:06,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:06,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481184628] [2021-12-17 00:56:06,172 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:56:06,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576546797] [2021-12-17 00:56:06,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576546797] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:06,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:56:06,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-17 00:56:06,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293095951] [2021-12-17 00:56:06,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:06,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 00:56:06,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:06,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 00:56:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:56:06,175 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:56:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:06,324 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2021-12-17 00:56:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 00:56:06,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-12-17 00:56:06,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:06,325 INFO L225 Difference]: With dead ends: 103 [2021-12-17 00:56:06,326 INFO L226 Difference]: Without dead ends: 91 [2021-12-17 00:56:06,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:56:06,326 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 109 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:06,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 81 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:56:06,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-17 00:56:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-12-17 00:56:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:56:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-12-17 00:56:06,339 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 35 [2021-12-17 00:56:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:06,339 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-12-17 00:56:06,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:56:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-12-17 00:56:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 00:56:06,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:06,341 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:06,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:06,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:06,560 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1373135831, now seen corresponding path program 6 times [2021-12-17 00:56:06,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:06,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604170404] [2021-12-17 00:56:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:06,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:06,581 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:56:06,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763856322] [2021-12-17 00:56:06,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:56:06,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:06,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:06,590 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) [2021-12-17 00:56:06,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 00:56:06,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 00:56:06,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:06,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:56:06,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:56:06,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:56:06,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:06,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604170404] [2021-12-17 00:56:06,867 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:56:06,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763856322] [2021-12-17 00:56:06,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763856322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:06,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:56:06,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-17 00:56:06,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177441863] [2021-12-17 00:56:06,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:06,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 00:56:06,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:06,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 00:56:06,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:56:06,869 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:56:07,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:07,036 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-12-17 00:56:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:56:07,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-12-17 00:56:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:07,045 INFO L225 Difference]: With dead ends: 90 [2021-12-17 00:56:07,045 INFO L226 Difference]: Without dead ends: 86 [2021-12-17 00:56:07,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-17 00:56:07,046 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:07,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 112 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:56:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-17 00:56:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2021-12-17 00:56:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 00:56:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-12-17 00:56:07,060 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 35 [2021-12-17 00:56:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:07,061 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-12-17 00:56:07,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:56:07,061 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-12-17 00:56:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 00:56:07,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:07,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:07,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:07,275 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,SelfDestructingSolverStorable8 [2021-12-17 00:56:07,276 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:07,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1081807417, now seen corresponding path program 7 times [2021-12-17 00:56:07,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:07,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560455906] [2021-12-17 00:56:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:07,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:07,288 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:56:07,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178029312] [2021-12-17 00:56:07,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:56:07,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:07,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:07,290 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) [2021-12-17 00:56:07,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 00:56:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:56:07,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-17 00:56:07,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:07,399 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 10 treesize of output 8 [2021-12-17 00:56:07,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:07,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:56:07,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-17 00:56:07,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:56:07,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:56:07,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:07,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:07,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-12-17 00:56:07,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:07,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:07,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:07,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:07,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:07,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:07,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-12-17 00:56:08,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,245 INFO L354 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2021-12-17 00:56:08,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 98 [2021-12-17 00:56:08,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:08,503 INFO L354 Elim1Store]: treesize reduction 164, result has 13.7 percent of original size [2021-12-17 00:56:08,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 103 treesize of output 112 [2021-12-17 00:56:09,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 49 [2021-12-17 00:56:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:56:09,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:12,149 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_423 Int) (|ULTIMATE.start_main_~index~0#1| Int)) (or (< (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|) v_ArrVal_423) (<= (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* |ULTIMATE.start_main_~index~0#1| 4)) v_ArrVal_423))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1|))) (div (+ c_~ARR_SIZE~0 1) 2)))) is different from false [2021-12-17 00:56:12,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:12,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560455906] [2021-12-17 00:56:12,174 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:56:12,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178029312] [2021-12-17 00:56:12,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178029312] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:12,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:56:12,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-17 00:56:12,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571178438] [2021-12-17 00:56:12,174 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:12,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 00:56:12,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:12,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 00:56:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=644, Unknown=1, NotChecked=52, Total=812 [2021-12-17 00:56:12,176 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:56:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:13,144 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2021-12-17 00:56:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 00:56:13,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-12-17 00:56:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:13,145 INFO L225 Difference]: With dead ends: 92 [2021-12-17 00:56:13,145 INFO L226 Difference]: Without dead ends: 88 [2021-12-17 00:56:13,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=157, Invalid=838, Unknown=1, NotChecked=60, Total=1056 [2021-12-17 00:56:13,146 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:13,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 244 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 373 Invalid, 0 Unknown, 33 Unchecked, 0.6s Time] [2021-12-17 00:56:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-17 00:56:13,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-12-17 00:56:13,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:56:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-12-17 00:56:13,162 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 37 [2021-12-17 00:56:13,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:13,162 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-12-17 00:56:13,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:56:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-12-17 00:56:13,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 00:56:13,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:13,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:13,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:13,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 00:56:13,379 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:13,380 INFO L85 PathProgramCache]: Analyzing trace with hash 70690167, now seen corresponding path program 2 times [2021-12-17 00:56:13,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:13,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323282293] [2021-12-17 00:56:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:13,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:13,392 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:56:13,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230380438] [2021-12-17 00:56:13,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:56:13,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:13,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:13,394 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) [2021-12-17 00:56:13,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 00:56:13,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:56:13,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-17 00:56:13,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:13,507 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 10 treesize of output 8 [2021-12-17 00:56:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:13,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:56:13,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:56:13,548 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 27 treesize of output 26 [2021-12-17 00:56:13,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:13,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:13,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-12-17 00:56:13,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:13,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:13,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:13,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:13,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-12-17 00:56:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:19,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:19,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:19,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:19,168 INFO L354 Elim1Store]: treesize reduction 70, result has 40.7 percent of original size [2021-12-17 00:56:19,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 104 [2021-12-17 00:56:22,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:22,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:22,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:22,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:22,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:22,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:22,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:22,055 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-12-17 00:56:22,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 148 [2021-12-17 00:56:44,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:44,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:44,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:44,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:44,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:44,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:44,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:56:44,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 8 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 142 [2021-12-17 00:56:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:56:45,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:47,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:47,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323282293] [2021-12-17 00:56:47,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:56:47,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230380438] [2021-12-17 00:56:47,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230380438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:56:47,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:56:47,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-17 00:56:47,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183339025] [2021-12-17 00:56:47,538 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:47,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 00:56:47,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 00:56:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1197, Unknown=12, NotChecked=0, Total=1406 [2021-12-17 00:56:47,539 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:56:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:53,631 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-12-17 00:56:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 00:56:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-12-17 00:56:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:53,632 INFO L225 Difference]: With dead ends: 107 [2021-12-17 00:56:53,632 INFO L226 Difference]: Without dead ends: 103 [2021-12-17 00:56:53,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=244, Invalid=1548, Unknown=14, NotChecked=0, Total=1806 [2021-12-17 00:56:53,633 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:53,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 358 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 448 Unchecked, 0.1s Time] [2021-12-17 00:56:53,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-17 00:56:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2021-12-17 00:56:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:56:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2021-12-17 00:56:53,645 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 37 [2021-12-17 00:56:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:53,645 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2021-12-17 00:56:53,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:56:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2021-12-17 00:56:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 00:56:53,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:53,647 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:53,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-17 00:56:53,851 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,SelfDestructingSolverStorable10 [2021-12-17 00:56:53,852 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash 288075803, now seen corresponding path program 8 times [2021-12-17 00:56:53,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:53,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457485025] [2021-12-17 00:56:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:53,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:53,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:56:53,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090153547] [2021-12-17 00:56:53,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:56:53,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:53,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:53,866 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) [2021-12-17 00:56:53,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 00:56:53,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:56:53,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:53,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:56:53,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:56:54,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:56:54,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:54,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457485025] [2021-12-17 00:56:54,200 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:56:54,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090153547] [2021-12-17 00:56:54,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090153547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:54,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:56:54,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-17 00:56:54,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555599644] [2021-12-17 00:56:54,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:54,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:56:54,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:56:54,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-17 00:56:54,201 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:56:54,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:54,519 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2021-12-17 00:56:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 00:56:54,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-12-17 00:56:54,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:54,521 INFO L225 Difference]: With dead ends: 144 [2021-12-17 00:56:54,521 INFO L226 Difference]: Without dead ends: 130 [2021-12-17 00:56:54,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2021-12-17 00:56:54,522 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:54,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 148 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:56:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-17 00:56:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-12-17 00:56:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 89 states have internal predecessors, (103), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 00:56:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-12-17 00:56:54,537 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 39 [2021-12-17 00:56:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:54,537 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-12-17 00:56:54,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:56:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-12-17 00:56:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 00:56:54,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:54,538 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:54,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:54,751 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,SelfDestructingSolverStorable11 [2021-12-17 00:56:54,752 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:54,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:54,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2118006027, now seen corresponding path program 3 times [2021-12-17 00:56:54,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:54,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266181736] [2021-12-17 00:56:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:54,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:54,779 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:56:54,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070421667] [2021-12-17 00:56:54,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:56:54,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:54,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:54,781 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) [2021-12-17 00:56:54,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 00:56:54,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-17 00:56:54,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:54,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:56:54,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:56:55,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:56:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:56:55,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:56:55,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266181736] [2021-12-17 00:56:55,142 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:56:55,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070421667] [2021-12-17 00:56:55,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070421667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:56:55,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:56:55,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-17 00:56:55,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379322231] [2021-12-17 00:56:55,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:56:55,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:56:55,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:56:55,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:56:55,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-17 00:56:55,143 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:56:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:56:55,481 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2021-12-17 00:56:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:56:55,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-12-17 00:56:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:56:55,482 INFO L225 Difference]: With dead ends: 129 [2021-12-17 00:56:55,482 INFO L226 Difference]: Without dead ends: 125 [2021-12-17 00:56:55,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-12-17 00:56:55,483 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:56:55,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 211 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:56:55,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-17 00:56:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2021-12-17 00:56:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 00:56:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-12-17 00:56:55,507 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 39 [2021-12-17 00:56:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:56:55,508 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-12-17 00:56:55,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:56:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-12-17 00:56:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 00:56:55,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:56:55,509 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:56:55,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 00:56:55,723 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,SelfDestructingSolverStorable12 [2021-12-17 00:56:55,723 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:56:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:56:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1485008409, now seen corresponding path program 9 times [2021-12-17 00:56:55,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:56:55,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784655580] [2021-12-17 00:56:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:56:55,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:56:55,735 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:56:55,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545597691] [2021-12-17 00:56:55,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:56:55,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:56:55,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:56:55,737 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) [2021-12-17 00:56:55,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 00:56:55,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-17 00:56:55,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:56:55,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-17 00:56:55,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:56:55,867 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 10 treesize of output 8 [2021-12-17 00:56:55,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:55,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:56:55,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:56:55,900 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 27 treesize of output 26 [2021-12-17 00:56:55,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:55,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-12-17 00:56:55,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-12-17 00:56:55,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:55,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-17 00:56:55,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:55,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-17 00:56:56,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:56,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-17 00:56:56,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:56,113 INFO L354 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2021-12-17 00:56:56,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 46 [2021-12-17 00:56:56,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:56,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:56,138 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-12-17 00:56:56,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 88 [2021-12-17 00:56:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:56,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 75 [2021-12-17 00:56:56,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:56,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:56,360 INFO L354 Elim1Store]: treesize reduction 70, result has 29.3 percent of original size [2021-12-17 00:56:56,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 61 [2021-12-17 00:56:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:56,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:56,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:56,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:56,399 INFO L354 Elim1Store]: treesize reduction 130, result has 15.0 percent of original size [2021-12-17 00:56:56,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 95 treesize of output 118 [2021-12-17 00:56:59,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:59,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:59,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:59,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:56:59,348 INFO L354 Elim1Store]: treesize reduction 167, result has 39.7 percent of original size [2021-12-17 00:56:59,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 94 treesize of output 184 [2021-12-17 00:57:02,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:02,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:02,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:02,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:02,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:02,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:03,035 INFO L354 Elim1Store]: treesize reduction 333, result has 8.5 percent of original size [2021-12-17 00:57:03,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 17 case distinctions, treesize of input 157 treesize of output 169 [2021-12-17 00:57:16,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:16,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:16,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:16,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:16,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:16,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:17,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:57:17,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 13 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 180 [2021-12-17 00:57:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:57:17,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:28,950 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~count~0#1_133| Int) (|aux_mod_ULTIMATE.start_main_~index~0#1_40| Int) (|aux_div_ULTIMATE.start_main_~index~0#1_40| Int) (v_ArrVal_711 Int)) (let ((.cse0 (+ |aux_mod_ULTIMATE.start_main_~index~0#1_40| (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|)))) (or (<= c_~ARR_SIZE~0 (+ |v_ULTIMATE.start_main_~count~0#1_133| 1)) (< |v_ULTIMATE.start_main_~count~0#1_133| 2) (< |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0) (<= c_~ARR_SIZE~0 .cse0) (< (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|) v_ArrVal_711) (< (+ |v_ULTIMATE.start_main_~count~0#1_133| 2) c_~ARR_SIZE~0) (< .cse0 0) (<= (let ((.cse7 (* |aux_mod_ULTIMATE.start_main_~index~0#1_40| 4)) (.cse8 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ .cse7 |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse8) v_ArrVal_711)))) (let ((.cse1 (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse6 (+ .cse7 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse8))) (store .cse5 .cse6 (select .cse5 .cse6))))) (let ((.cse2 (* |v_ULTIMATE.start_main_~count~0#1_133| 4)) (.cse3 (select (store .cse4 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (select .cse3 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ .cse2 |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse3 (+ .cse2 |c_ULTIMATE.start_main_~#array1~0#1.offset|)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse3 (+ .cse2 |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse3 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))))) (div (+ c_~ARR_SIZE~0 1) 2)) (< 0 |aux_mod_ULTIMATE.start_main_~index~0#1_40|)))) is different from false [2021-12-17 00:57:28,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:28,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784655580] [2021-12-17 00:57:28,955 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:57:28,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545597691] [2021-12-17 00:57:28,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545597691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:28,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:57:28,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-12-17 00:57:28,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75086276] [2021-12-17 00:57:28,955 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:28,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 00:57:28,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:28,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 00:57:28,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1656, Unknown=15, NotChecked=84, Total=1980 [2021-12-17 00:57:28,957 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:57:29,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:29,797 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2021-12-17 00:57:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 00:57:29,797 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-12-17 00:57:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:29,798 INFO L225 Difference]: With dead ends: 130 [2021-12-17 00:57:29,798 INFO L226 Difference]: Without dead ends: 126 [2021-12-17 00:57:29,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=265, Invalid=2076, Unknown=15, NotChecked=94, Total=2450 [2021-12-17 00:57:29,799 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:29,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 316 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 237 Unchecked, 0.1s Time] [2021-12-17 00:57:29,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-17 00:57:29,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2021-12-17 00:57:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 91 states have internal predecessors, (105), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 00:57:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2021-12-17 00:57:29,814 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 41 [2021-12-17 00:57:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:29,814 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2021-12-17 00:57:29,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:57:29,815 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2021-12-17 00:57:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 00:57:29,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:29,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:29,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:30,016 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,SelfDestructingSolverStorable13 [2021-12-17 00:57:30,017 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:30,017 INFO L85 PathProgramCache]: Analyzing trace with hash 463940055, now seen corresponding path program 4 times [2021-12-17 00:57:30,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:30,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391468580] [2021-12-17 00:57:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:30,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:30,029 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:57:30,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635281453] [2021-12-17 00:57:30,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:57:30,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:30,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:30,031 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) [2021-12-17 00:57:30,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 00:57:30,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:57:30,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:57:30,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-17 00:57:30,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:30,192 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 10 treesize of output 8 [2021-12-17 00:57:30,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:57:30,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-17 00:57:30,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:57:30,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:57:30,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-12-17 00:57:30,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2021-12-17 00:57:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:30,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 113 [2021-12-17 00:57:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:31,912 INFO L354 Elim1Store]: treesize reduction 90, result has 39.6 percent of original size [2021-12-17 00:57:31,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 128 [2021-12-17 00:57:32,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:32,390 INFO L354 Elim1Store]: treesize reduction 86, result has 31.2 percent of original size [2021-12-17 00:57:32,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 164 [2021-12-17 00:57:39,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:57:39,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:57:39,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:57:39,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:39,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:57:39,428 INFO L354 Elim1Store]: treesize reduction 54, result has 55.4 percent of original size [2021-12-17 00:57:39,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 9 disjoint index pairs (out of 153 index pairs), introduced 10 new quantified variables, introduced 8 case distinctions, treesize of input 186 treesize of output 140 [2021-12-17 00:57:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:57:39,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:52,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:52,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391468580] [2021-12-17 00:57:52,255 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:57:52,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635281453] [2021-12-17 00:57:52,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635281453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:52,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:57:52,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-12-17 00:57:52,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389079631] [2021-12-17 00:57:52,255 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:52,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 00:57:52,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:52,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 00:57:52,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1724, Unknown=4, NotChecked=0, Total=2070 [2021-12-17 00:57:52,257 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 29 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:57:53,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:53,222 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2021-12-17 00:57:53,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 00:57:53,223 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 29 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-12-17 00:57:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:53,224 INFO L225 Difference]: With dead ends: 150 [2021-12-17 00:57:53,224 INFO L226 Difference]: Without dead ends: 146 [2021-12-17 00:57:53,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=413, Invalid=2033, Unknown=4, NotChecked=0, Total=2450 [2021-12-17 00:57:53,226 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:53,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 342 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 331 Invalid, 0 Unknown, 231 Unchecked, 0.5s Time] [2021-12-17 00:57:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-17 00:57:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 117. [2021-12-17 00:57:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:57:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 132 transitions. [2021-12-17 00:57:53,249 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 132 transitions. Word has length 41 [2021-12-17 00:57:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:53,249 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 132 transitions. [2021-12-17 00:57:53,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 29 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:57:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 132 transitions. [2021-12-17 00:57:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 00:57:53,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:53,250 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:53,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:53,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:53,451 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:57:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:57:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2111753712, now seen corresponding path program 1 times [2021-12-17 00:57:53,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:57:53,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194392411] [2021-12-17 00:57:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:53,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:57:53,470 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:57:53,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987422793] [2021-12-17 00:57:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:57:53,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:57:53,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:57:53,472 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) [2021-12-17 00:57:53,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 00:57:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:57:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-17 00:57:53,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:57:53,573 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 10 treesize of output 8 [2021-12-17 00:57:53,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:53,604 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 18 treesize of output 18 [2021-12-17 00:57:53,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:57:53,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:53,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-12-17 00:57:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:54,235 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-12-17 00:57:54,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 52 [2021-12-17 00:57:54,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:57:54,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:54,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-12-17 00:57:54,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:54,769 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-12-17 00:57:54,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 52 [2021-12-17 00:57:55,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:57:55,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:55,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:57:55,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2021-12-17 00:57:55,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:57:55,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 20 [2021-12-17 00:57:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:57:55,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:57:58,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:57:58,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194392411] [2021-12-17 00:57:58,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:57:58,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987422793] [2021-12-17 00:57:58,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987422793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:57:58,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:57:58,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-17 00:57:58,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729089499] [2021-12-17 00:57:58,785 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:57:58,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 00:57:58,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:57:58,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 00:57:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=851, Unknown=1, NotChecked=0, Total=992 [2021-12-17 00:57:58,787 INFO L87 Difference]: Start difference. First operand 117 states and 132 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:57:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:57:59,770 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2021-12-17 00:57:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 00:57:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2021-12-17 00:57:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:57:59,772 INFO L225 Difference]: With dead ends: 141 [2021-12-17 00:57:59,772 INFO L226 Difference]: Without dead ends: 131 [2021-12-17 00:57:59,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=259, Invalid=1300, Unknown=1, NotChecked=0, Total=1560 [2021-12-17 00:57:59,773 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:57:59,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 293 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 206 Invalid, 0 Unknown, 211 Unchecked, 0.3s Time] [2021-12-17 00:57:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-17 00:57:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-12-17 00:57:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 108 states have internal predecessors, (125), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:57:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2021-12-17 00:57:59,791 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 43 [2021-12-17 00:57:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:57:59,791 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2021-12-17 00:57:59,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:57:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2021-12-17 00:57:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 00:57:59,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:57:59,792 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:57:59,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 00:57:59,999 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,SelfDestructingSolverStorable15 [2021-12-17 00:57:59,999 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:00,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:00,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1853588274, now seen corresponding path program 1 times [2021-12-17 00:58:00,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:00,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43761005] [2021-12-17 00:58:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:00,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:00,019 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:58:00,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158993847] [2021-12-17 00:58:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:00,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:00,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:00,021 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) [2021-12-17 00:58:00,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 00:58:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:00,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-17 00:58:00,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:00,151 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 10 treesize of output 8 [2021-12-17 00:58:00,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:00,179 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 18 treesize of output 18 [2021-12-17 00:58:00,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:58:00,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:00,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2021-12-17 00:58:00,655 INFO L354 Elim1Store]: treesize reduction 28, result has 34.9 percent of original size [2021-12-17 00:58:00,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 43 [2021-12-17 00:58:01,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:01,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:01,454 INFO L354 Elim1Store]: treesize reduction 154, result has 13.5 percent of original size [2021-12-17 00:58:01,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 47 [2021-12-17 00:58:02,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:02,066 INFO L354 Elim1Store]: treesize reduction 147, result has 23.0 percent of original size [2021-12-17 00:58:02,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 70 [2021-12-17 00:58:03,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:03,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:03,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:03,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:03,378 INFO L354 Elim1Store]: treesize reduction 34, result has 29.2 percent of original size [2021-12-17 00:58:03,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 62 [2021-12-17 00:58:04,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:04,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:04,487 INFO L354 Elim1Store]: treesize reduction 200, result has 10.3 percent of original size [2021-12-17 00:58:04,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 44 [2021-12-17 00:58:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:58:04,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:14,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:14,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43761005] [2021-12-17 00:58:14,003 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:58:14,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158993847] [2021-12-17 00:58:14,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158993847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:14,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:58:14,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-17 00:58:14,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452766497] [2021-12-17 00:58:14,004 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:14,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 00:58:14,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:14,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 00:58:14,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1160, Unknown=7, NotChecked=0, Total=1332 [2021-12-17 00:58:14,005 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:58:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:15,092 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2021-12-17 00:58:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 00:58:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-12-17 00:58:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:15,094 INFO L225 Difference]: With dead ends: 142 [2021-12-17 00:58:15,094 INFO L226 Difference]: Without dead ends: 132 [2021-12-17 00:58:15,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=221, Invalid=1493, Unknown=8, NotChecked=0, Total=1722 [2021-12-17 00:58:15,095 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:15,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 344 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 301 Unchecked, 0.2s Time] [2021-12-17 00:58:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-17 00:58:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 119. [2021-12-17 00:58:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 102 states have internal predecessors, (118), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 00:58:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2021-12-17 00:58:15,115 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 43 [2021-12-17 00:58:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:15,116 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2021-12-17 00:58:15,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:58:15,116 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2021-12-17 00:58:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 00:58:15,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:15,116 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:15,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:15,317 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,SelfDestructingSolverStorable16 [2021-12-17 00:58:15,317 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:15,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1892898994, now seen corresponding path program 2 times [2021-12-17 00:58:15,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:15,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46339268] [2021-12-17 00:58:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:15,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:15,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:58:15,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839056278] [2021-12-17 00:58:15,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:58:15,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:15,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:15,327 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) [2021-12-17 00:58:15,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 00:58:15,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:58:15,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:58:15,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-17 00:58:15,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:15,478 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 10 treesize of output 8 [2021-12-17 00:58:15,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:15,502 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 18 treesize of output 18 [2021-12-17 00:58:15,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:58:15,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:15,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-12-17 00:58:16,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:16,049 INFO L354 Elim1Store]: treesize reduction 28, result has 34.9 percent of original size [2021-12-17 00:58:16,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 55 [2021-12-17 00:58:17,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:17,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:17,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:17,334 INFO L354 Elim1Store]: treesize reduction 32, result has 30.4 percent of original size [2021-12-17 00:58:17,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 57 [2021-12-17 00:58:17,977 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 00:58:17,977 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 00:58:18,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:18,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:18,379 INFO L354 Elim1Store]: treesize reduction 122, result has 29.9 percent of original size [2021-12-17 00:58:18,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 77 [2021-12-17 00:58:18,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:18,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:18,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:18,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:18,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:18,882 INFO L354 Elim1Store]: treesize reduction 44, result has 25.4 percent of original size [2021-12-17 00:58:18,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 75 treesize of output 78 [2021-12-17 00:58:19,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:19,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:19,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:19,585 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-12-17 00:58:19,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 70 treesize of output 38 [2021-12-17 00:58:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:58:19,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:23,342 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1015 Int) (|aux_div_ULTIMATE.start_main_~index~0#1_40| Int) (v_ArrVal_1018 Int)) (let ((.cse6 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse6) v_ArrVal_1015)))) (let ((.cse0 (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|)) (.cse4 (select .cse3 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse6))) (or (< .cse0 0) (<= c_~ARR_SIZE~0 .cse0) (<= (let ((.cse1 (store .cse4 .cse5 v_ArrVal_1018))) (let ((.cse2 (select (store .cse3 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse2 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))) (div (+ c_~ARR_SIZE~0 1) 2)) (< (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|) v_ArrVal_1015) (< (select .cse4 .cse5) v_ArrVal_1018)))))) is different from false [2021-12-17 00:58:23,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:23,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46339268] [2021-12-17 00:58:23,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:58:23,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839056278] [2021-12-17 00:58:23,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839056278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:23,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:58:23,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-17 00:58:23,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99079275] [2021-12-17 00:58:23,351 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:23,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 00:58:23,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 00:58:23,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1098, Unknown=3, NotChecked=68, Total=1332 [2021-12-17 00:58:23,352 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:58:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:58:23,683 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2021-12-17 00:58:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 00:58:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-12-17 00:58:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:58:23,685 INFO L225 Difference]: With dead ends: 154 [2021-12-17 00:58:23,685 INFO L226 Difference]: Without dead ends: 144 [2021-12-17 00:58:23,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=194, Invalid=1289, Unknown=3, NotChecked=74, Total=1560 [2021-12-17 00:58:23,686 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:58:23,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 346 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 254 Unchecked, 0.2s Time] [2021-12-17 00:58:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-17 00:58:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2021-12-17 00:58:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 116 states have (on average 1.1551724137931034) internal successors, (134), 116 states have internal predecessors, (134), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 00:58:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2021-12-17 00:58:23,704 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 43 [2021-12-17 00:58:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:58:23,704 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2021-12-17 00:58:23,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:58:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2021-12-17 00:58:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 00:58:23,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:58:23,705 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:58:23,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 00:58:23,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 00:58:23,906 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:58:23,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:58:23,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1634733556, now seen corresponding path program 1 times [2021-12-17 00:58:23,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:58:23,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167215507] [2021-12-17 00:58:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:23,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:58:23,921 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:58:23,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802757077] [2021-12-17 00:58:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:58:23,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:58:23,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:58:23,926 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) [2021-12-17 00:58:23,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 00:58:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:58:24,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-17 00:58:24,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:58:24,049 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 10 treesize of output 8 [2021-12-17 00:58:24,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:24,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:58:24,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-17 00:58:24,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:58:24,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:58:24,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:24,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:24,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-12-17 00:58:24,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:24,626 INFO L354 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2021-12-17 00:58:24,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 56 [2021-12-17 00:58:26,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:26,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-12-17 00:58:31,320 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-12-17 00:58:31,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 38 [2021-12-17 00:58:33,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:33,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:33,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-12-17 00:58:36,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:58:36,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:58:36,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 22 [2021-12-17 00:58:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:58:37,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:58:54,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:58:54,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167215507] [2021-12-17 00:58:54,717 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:58:54,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802757077] [2021-12-17 00:58:54,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802757077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:58:54,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:58:54,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-17 00:58:54,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424075519] [2021-12-17 00:58:54,718 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:58:54,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 00:58:54,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:58:54,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 00:58:54,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1128, Unknown=21, NotChecked=0, Total=1332 [2021-12-17 00:58:54,719 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:59:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:59:02,222 INFO L93 Difference]: Finished difference Result 161 states and 179 transitions. [2021-12-17 00:59:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 00:59:02,222 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-12-17 00:59:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:59:02,223 INFO L225 Difference]: With dead ends: 161 [2021-12-17 00:59:02,223 INFO L226 Difference]: Without dead ends: 151 [2021-12-17 00:59:02,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=272, Invalid=1678, Unknown=30, NotChecked=0, Total=1980 [2021-12-17 00:59:02,225 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:59:02,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 287 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 196 Invalid, 0 Unknown, 250 Unchecked, 0.2s Time] [2021-12-17 00:59:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-17 00:59:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2021-12-17 00:59:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 124 states have (on average 1.153225806451613) internal successors, (143), 124 states have internal predecessors, (143), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 00:59:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 165 transitions. [2021-12-17 00:59:02,246 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 165 transitions. Word has length 43 [2021-12-17 00:59:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:59:02,246 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 165 transitions. [2021-12-17 00:59:02,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 00:59:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 165 transitions. [2021-12-17 00:59:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 00:59:02,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:59:02,247 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:59:02,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 00:59:02,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:02,447 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:59:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:59:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1217172475, now seen corresponding path program 10 times [2021-12-17 00:59:02,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:59:02,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022498045] [2021-12-17 00:59:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:59:02,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:59:02,457 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:59:02,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603939182] [2021-12-17 00:59:02,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:59:02,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:02,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:59:02,459 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:59:02,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 00:59:02,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:59:02,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:59:02,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 00:59:02,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:59:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:59:02,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:59:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:59:02,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:59:02,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022498045] [2021-12-17 00:59:02,891 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:59:02,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603939182] [2021-12-17 00:59:02,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603939182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:59:02,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:59:02,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-12-17 00:59:02,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738032501] [2021-12-17 00:59:02,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:59:02,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:59:02,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:59:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:59:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:59:02,892 INFO L87 Difference]: Start difference. First operand 147 states and 165 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:59:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:59:03,426 INFO L93 Difference]: Finished difference Result 217 states and 236 transitions. [2021-12-17 00:59:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 00:59:03,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-12-17 00:59:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:59:03,428 INFO L225 Difference]: With dead ends: 217 [2021-12-17 00:59:03,428 INFO L226 Difference]: Without dead ends: 201 [2021-12-17 00:59:03,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 00:59:03,429 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 209 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:59:03,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 176 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:59:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-17 00:59:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 162. [2021-12-17 00:59:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 137 states have (on average 1.1532846715328466) internal successors, (158), 137 states have internal predecessors, (158), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 00:59:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 182 transitions. [2021-12-17 00:59:03,460 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 182 transitions. Word has length 43 [2021-12-17 00:59:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:59:03,460 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 182 transitions. [2021-12-17 00:59:03,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:59:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 182 transitions. [2021-12-17 00:59:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 00:59:03,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:59:03,461 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:59:03,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-17 00:59:03,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:03,675 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:59:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:59:03,676 INFO L85 PathProgramCache]: Analyzing trace with hash -335060907, now seen corresponding path program 5 times [2021-12-17 00:59:03,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:59:03,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96092451] [2021-12-17 00:59:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:59:03,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:59:03,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:59:03,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276786961] [2021-12-17 00:59:03,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:59:03,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:03,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:59:03,687 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:59:03,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 00:59:03,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-17 00:59:03,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:59:03,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 00:59:03,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:59:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:59:03,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:59:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 00:59:04,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:59:04,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96092451] [2021-12-17 00:59:04,156 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:59:04,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276786961] [2021-12-17 00:59:04,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276786961] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:59:04,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:59:04,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-12-17 00:59:04,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65577754] [2021-12-17 00:59:04,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:59:04,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:59:04,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:59:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:59:04,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:59:04,158 INFO L87 Difference]: Start difference. First operand 162 states and 182 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:59:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:59:04,537 INFO L93 Difference]: Finished difference Result 200 states and 217 transitions. [2021-12-17 00:59:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 00:59:04,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-12-17 00:59:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:59:04,538 INFO L225 Difference]: With dead ends: 200 [2021-12-17 00:59:04,539 INFO L226 Difference]: Without dead ends: 196 [2021-12-17 00:59:04,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-12-17 00:59:04,539 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 78 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:59:04,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 167 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:59:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-17 00:59:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2021-12-17 00:59:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 128 states have (on average 1.1484375) internal successors, (147), 128 states have internal predecessors, (147), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 00:59:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 169 transitions. [2021-12-17 00:59:04,561 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 169 transitions. Word has length 43 [2021-12-17 00:59:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:59:04,562 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 169 transitions. [2021-12-17 00:59:04,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 00:59:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 169 transitions. [2021-12-17 00:59:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 00:59:04,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:59:04,562 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:59:04,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 00:59:04,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-17 00:59:04,763 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:59:04,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:59:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2118573319, now seen corresponding path program 11 times [2021-12-17 00:59:04,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:59:04,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785732299] [2021-12-17 00:59:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:59:04,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:59:04,776 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:59:04,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580669060] [2021-12-17 00:59:04,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:59:04,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:04,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:59:04,778 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:59:04,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 00:59:04,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-17 00:59:04,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:59:04,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-17 00:59:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:59:04,984 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 10 treesize of output 8 [2021-12-17 00:59:05,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:59:05,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-17 00:59:05,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:59:05,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:59:05,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-12-17 00:59:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-17 00:59:05,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-12-17 00:59:05,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2021-12-17 00:59:05,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2021-12-17 00:59:05,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2021-12-17 00:59:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:05,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2021-12-17 00:59:06,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:06,937 INFO L354 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2021-12-17 00:59:06,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 158 [2021-12-17 00:59:09,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:09,454 INFO L354 Elim1Store]: treesize reduction 280, result has 13.6 percent of original size [2021-12-17 00:59:09,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 151 treesize of output 172 [2021-12-17 00:59:21,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 11 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 98 [2021-12-17 00:59:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:59:21,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:59:38,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:59:38,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785732299] [2021-12-17 00:59:38,127 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:59:38,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580669060] [2021-12-17 00:59:38,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580669060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:59:38,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:59:38,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-12-17 00:59:38,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652305900] [2021-12-17 00:59:38,127 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:59:38,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 00:59:38,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:59:38,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 00:59:38,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1740, Unknown=12, NotChecked=0, Total=1980 [2021-12-17 00:59:38,128 INFO L87 Difference]: Start difference. First operand 151 states and 169 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:59:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:59:40,754 INFO L93 Difference]: Finished difference Result 182 states and 203 transitions. [2021-12-17 00:59:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 00:59:40,754 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-17 00:59:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:59:40,755 INFO L225 Difference]: With dead ends: 182 [2021-12-17 00:59:40,755 INFO L226 Difference]: Without dead ends: 178 [2021-12-17 00:59:40,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=262, Invalid=1981, Unknown=13, NotChecked=0, Total=2256 [2021-12-17 00:59:40,756 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 38 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:59:40,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 445 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 882 Invalid, 0 Unknown, 158 Unchecked, 1.3s Time] [2021-12-17 00:59:40,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-17 00:59:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2021-12-17 00:59:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 139 states have internal predecessors, (160), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 00:59:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2021-12-17 00:59:40,778 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 45 [2021-12-17 00:59:40,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:59:40,779 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2021-12-17 00:59:40,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 00:59:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2021-12-17 00:59:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 00:59:40,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:59:40,780 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:59:40,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 00:59:40,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 00:59:40,990 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:59:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:59:40,991 INFO L85 PathProgramCache]: Analyzing trace with hash 182249271, now seen corresponding path program 6 times [2021-12-17 00:59:40,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:59:40,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13589390] [2021-12-17 00:59:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:59:40,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:59:41,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:59:41,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620919722] [2021-12-17 00:59:41,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:59:41,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:59:41,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:59:41,005 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:59:41,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 00:59:41,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 00:59:41,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:59:41,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-17 00:59:41,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:59:41,234 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 10 treesize of output 8 [2021-12-17 00:59:41,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-12-17 00:59:41,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-17 00:59:41,295 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 19 treesize of output 18 [2021-12-17 00:59:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-12-17 00:59:41,387 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-12-17 00:59:41,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2021-12-17 00:59:41,404 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-12-17 00:59:41,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 52 [2021-12-17 00:59:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 61 [2021-12-17 00:59:41,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-12-17 00:59:41,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,595 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-12-17 00:59:41,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 37 [2021-12-17 00:59:41,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,632 INFO L354 Elim1Store]: treesize reduction 32, result has 28.9 percent of original size [2021-12-17 00:59:41,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 43 [2021-12-17 00:59:41,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 81 [2021-12-17 00:59:41,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2021-12-17 00:59:41,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,890 INFO L354 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2021-12-17 00:59:41,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 52 [2021-12-17 00:59:41,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:41,921 INFO L354 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2021-12-17 00:59:41,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 58 [2021-12-17 00:59:42,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 101 [2021-12-17 00:59:42,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,271 INFO L354 Elim1Store]: treesize reduction 58, result has 18.3 percent of original size [2021-12-17 00:59:42,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 73 [2021-12-17 00:59:42,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:42,310 INFO L354 Elim1Store]: treesize reduction 115, result has 5.7 percent of original size [2021-12-17 00:59:42,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 13 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 119 treesize of output 142 [2021-12-17 00:59:44,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:44,467 INFO L354 Elim1Store]: treesize reduction 210, result has 39.8 percent of original size [2021-12-17 00:59:44,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 127 treesize of output 237 [2021-12-17 00:59:48,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:59:48,758 INFO L354 Elim1Store]: treesize reduction 283, result has 25.9 percent of original size [2021-12-17 00:59:48,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 17 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 208 treesize of output 277 Killed by 15