./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-multidimensional/copy-partial-2-n-u.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 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:13:55,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:13:55,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:13:55,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:13:55,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:13:55,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:13:55,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:13:55,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:13:55,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:13:55,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:13:55,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:13:55,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:13:55,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:13:55,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:13:55,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:13:55,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:13:55,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:13:55,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:13:55,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:13:55,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:13:55,637 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:13:55,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:13:55,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:13:55,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:13:55,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:13:55,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:13:55,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:13:55,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:13:55,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:13:55,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:13:55,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:13:55,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:13:55,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:13:55,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:13:55,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:13:55,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:13:55,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:13:55,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:13:55,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:13:55,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:13:55,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:13:55,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:13:55,651 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:13:55,680 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:13:55,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:13:55,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:13:55,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:13:55,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:13:55,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:13:55,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:13:55,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:13:55,682 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:13:55,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:13:55,683 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:13:55,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:13:55,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:13:55,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:13:55,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:13:55,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:13:55,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:13:55,684 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:13:55,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:13:55,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:13:55,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:13:55,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:13:55,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:13:55,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:13:55,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:13:55,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:13:55,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:13:55,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:13:55,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:13:55,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:13:55,686 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:13:55,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:13:55,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:13:55,687 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee [2022-07-22 10:13:55,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:13:55,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:13:55,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:13:55,896 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:13:55,896 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:13:55,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2022-07-22 10:13:55,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b88763f25/efc91bf9255145299f5b517138a1c9cc/FLAGde0edb72b [2022-07-22 10:13:56,265 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:13:56,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2022-07-22 10:13:56,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b88763f25/efc91bf9255145299f5b517138a1c9cc/FLAGde0edb72b [2022-07-22 10:13:56,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b88763f25/efc91bf9255145299f5b517138a1c9cc [2022-07-22 10:13:56,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:13:56,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:13:56,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:13:56,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:13:56,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:13:56,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d4911f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56, skipping insertion in model container [2022-07-22 10:13:56,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:13:56,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:13:56,801 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-multidimensional/copy-partial-2-n-u.c[416,429] [2022-07-22 10:13:56,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:13:56,815 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:13:56,822 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-multidimensional/copy-partial-2-n-u.c[416,429] [2022-07-22 10:13:56,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:13:56,834 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:13:56,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56 WrapperNode [2022-07-22 10:13:56,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:13:56,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:13:56,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:13:56,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:13:56,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,855 INFO L137 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2022-07-22 10:13:56,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:13:56,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:13:56,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:13:56,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:13:56,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:13:56,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:13:56,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:13:56,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:13:56,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56" (1/1) ... [2022-07-22 10:13:56,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:13:56,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:56,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 10:13:56,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 10:13:56,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:13:56,920 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 10:13:56,920 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 10:13:56,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:13:56,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 10:13:56,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:13:56,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:13:56,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:13:56,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:13:56,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 10:13:56,964 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:13:56,965 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:13:57,122 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:13:57,126 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:13:57,126 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 10:13:57,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:13:57 BoogieIcfgContainer [2022-07-22 10:13:57,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:13:57,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:13:57,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:13:57,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:13:57,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:13:56" (1/3) ... [2022-07-22 10:13:57,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af16ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:13:57, skipping insertion in model container [2022-07-22 10:13:57,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:13:56" (2/3) ... [2022-07-22 10:13:57,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af16ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:13:57, skipping insertion in model container [2022-07-22 10:13:57,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:13:57" (3/3) ... [2022-07-22 10:13:57,143 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2022-07-22 10:13:57,152 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:13:57,152 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:13:57,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:13:57,202 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1aef732c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f2ceeb6 [2022-07-22 10:13:57,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:13:57,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 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) [2022-07-22 10:13:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 10:13:57,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:57,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:57,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash -897666833, now seen corresponding path program 1 times [2022-07-22 10:13:57,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:57,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733669717] [2022-07-22 10:13:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:57,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:57,317 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:13:57,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282087161] [2022-07-22 10:13:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:57,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:57,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:57,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:13:57,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:13:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:57,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 10:13:57,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:13:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 10:13:57,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:13:57,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:13:57,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733669717] [2022-07-22 10:13:57,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:13:57,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282087161] [2022-07-22 10:13:57,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282087161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:13:57,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:13:57,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:13:57,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933311309] [2022-07-22 10:13:57,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:13:57,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:13:57,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:13:57,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:13:57,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:13:57,451 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 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 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:13:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:57,467 INFO L93 Difference]: Finished difference Result 53 states and 82 transitions. [2022-07-22 10:13:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:13:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-07-22 10:13:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:57,474 INFO L225 Difference]: With dead ends: 53 [2022-07-22 10:13:57,474 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 10:13:57,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:13:57,481 INFO L413 NwaCegarLoop]: 34 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, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:57,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:13:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 10:13:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-22 10:13:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2022-07-22 10:13:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-22 10:13:57,517 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 21 [2022-07-22 10:13:57,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:57,518 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-22 10:13:57,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:13:57,518 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-07-22 10:13:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 10:13:57,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:57,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:57,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 10:13:57,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-22 10:13:57,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:57,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2067117999, now seen corresponding path program 1 times [2022-07-22 10:13:57,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:57,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265758994] [2022-07-22 10:13:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:57,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:57,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:13:57,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611267364] [2022-07-22 10:13:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:57,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:57,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:57,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:13:57,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:13:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:57,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 10:13:57,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:13:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:13:57,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:13:57,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:13:57,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265758994] [2022-07-22 10:13:57,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:13:57,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611267364] [2022-07-22 10:13:57,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611267364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:13:57,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:13:57,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:13:57,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081000668] [2022-07-22 10:13:57,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:13:57,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:13:57,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:13:57,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:13:57,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:13:57,853 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 10:13:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:57,923 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-07-22 10:13:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:13:57,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-07-22 10:13:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:57,925 INFO L225 Difference]: With dead ends: 50 [2022-07-22 10:13:57,925 INFO L226 Difference]: Without dead ends: 38 [2022-07-22 10:13:57,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:13:57,927 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:57,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 36 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:13:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-22 10:13:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2022-07-22 10:13:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2022-07-22 10:13:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-07-22 10:13:57,940 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 21 [2022-07-22 10:13:57,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:57,942 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-22 10:13:57,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 10:13:57,942 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-07-22 10:13:57,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 10:13:57,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:57,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:57,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:13:58,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-22 10:13:58,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:58,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1849346137, now seen corresponding path program 1 times [2022-07-22 10:13:58,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:58,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329481976] [2022-07-22 10:13:58,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:58,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:58,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:13:58,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593379917] [2022-07-22 10:13:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:58,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:58,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:58,170 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:13:58,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:13:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:58,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 10:13:58,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:13:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:13:58,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:13:58,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:13:58,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329481976] [2022-07-22 10:13:58,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:13:58,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593379917] [2022-07-22 10:13:58,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593379917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:13:58,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:13:58,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:13:58,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841678067] [2022-07-22 10:13:58,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:13:58,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:13:58,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:13:58,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:13:58,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:13:58,264 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 10:13:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:58,294 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-07-22 10:13:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:13:58,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-22 10:13:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:58,295 INFO L225 Difference]: With dead ends: 52 [2022-07-22 10:13:58,295 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 10:13:58,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:13:58,296 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:58,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 41 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:13:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 10:13:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-07-22 10:13:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2022-07-22 10:13:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-07-22 10:13:58,301 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 24 [2022-07-22 10:13:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:58,301 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-07-22 10:13:58,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 10:13:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-07-22 10:13:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 10:13:58,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:58,302 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:58,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 10:13:58,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:58,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2114191326, now seen corresponding path program 1 times [2022-07-22 10:13:58,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:58,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072889374] [2022-07-22 10:13:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:58,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:58,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:13:58,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350241930] [2022-07-22 10:13:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:58,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:58,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:58,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:13:58,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:13:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:58,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:13:58,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:13:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:13:58,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:13:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:13:58,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:13:58,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072889374] [2022-07-22 10:13:58,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:13:58,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350241930] [2022-07-22 10:13:58,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350241930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:13:58,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:13:58,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-22 10:13:58,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238764351] [2022-07-22 10:13:58,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:13:58,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 10:13:58,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:13:58,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 10:13:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-22 10:13:58,646 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:13:58,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:58,743 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2022-07-22 10:13:58,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 10:13:58,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-07-22 10:13:58,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:58,745 INFO L225 Difference]: With dead ends: 89 [2022-07-22 10:13:58,745 INFO L226 Difference]: Without dead ends: 73 [2022-07-22 10:13:58,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-22 10:13:58,746 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:58,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 64 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:13:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-22 10:13:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 29. [2022-07-22 10:13:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2022-07-22 10:13:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-22 10:13:58,752 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2022-07-22 10:13:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:58,752 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-22 10:13:58,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:13:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-22 10:13:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 10:13:58,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:58,753 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:58,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 10:13:58,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:58,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash 256970087, now seen corresponding path program 2 times [2022-07-22 10:13:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:58,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794886312] [2022-07-22 10:13:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:58,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:58,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:13:58,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597353439] [2022-07-22 10:13:58,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:13:58,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:58,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:58,983 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:13:58,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 10:13:59,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 10:13:59,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:13:59,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 10:13:59,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:13:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 10:13:59,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:13:59,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:13:59,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794886312] [2022-07-22 10:13:59,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:13:59,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597353439] [2022-07-22 10:13:59,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597353439] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:13:59,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:13:59,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:13:59,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609376701] [2022-07-22 10:13:59,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:13:59,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:13:59,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:13:59,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:13:59,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:13:59,070 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 10:13:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:59,104 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-07-22 10:13:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:13:59,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-07-22 10:13:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:59,105 INFO L225 Difference]: With dead ends: 53 [2022-07-22 10:13:59,105 INFO L226 Difference]: Without dead ends: 45 [2022-07-22 10:13:59,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:13:59,106 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:59,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:13:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-22 10:13:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2022-07-22 10:13:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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) [2022-07-22 10:13:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-07-22 10:13:59,112 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 28 [2022-07-22 10:13:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:59,112 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-07-22 10:13:59,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 10:13:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-07-22 10:13:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 10:13:59,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:59,115 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:59,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 10:13:59,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:59,326 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1830663741, now seen corresponding path program 1 times [2022-07-22 10:13:59,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:59,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965161020] [2022-07-22 10:13:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:59,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:59,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:13:59,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196708887] [2022-07-22 10:13:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:59,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:59,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:59,336 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:13:59,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 10:13:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:13:59,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 10:13:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:13:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 10:13:59,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:13:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 10:13:59,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:13:59,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965161020] [2022-07-22 10:13:59,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:13:59,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196708887] [2022-07-22 10:13:59,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196708887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:13:59,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:13:59,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-22 10:13:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288208174] [2022-07-22 10:13:59,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:13:59,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 10:13:59,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:13:59,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 10:13:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:13:59,519 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:13:59,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:13:59,734 INFO L93 Difference]: Finished difference Result 166 states and 213 transitions. [2022-07-22 10:13:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 10:13:59,735 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-07-22 10:13:59,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:13:59,735 INFO L225 Difference]: With dead ends: 166 [2022-07-22 10:13:59,735 INFO L226 Difference]: Without dead ends: 146 [2022-07-22 10:13:59,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-07-22 10:13:59,736 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 305 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:13:59,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 114 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:13:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-22 10:13:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 36. [2022-07-22 10:13:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 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) [2022-07-22 10:13:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-22 10:13:59,743 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 31 [2022-07-22 10:13:59,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:13:59,755 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-22 10:13:59,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:13:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-22 10:13:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 10:13:59,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:13:59,756 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:13:59,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 10:13:59,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:59,956 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:13:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:13:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1107716387, now seen corresponding path program 2 times [2022-07-22 10:13:59,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:13:59,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940185705] [2022-07-22 10:13:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:13:59,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:13:59,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:13:59,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384270773] [2022-07-22 10:13:59,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:13:59,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:13:59,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:13:59,968 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:13:59,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 10:14:00,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:14:00,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:14:00,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 10:14:00,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:14:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 10:14:00,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:14:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 10:14:00,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:14:00,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940185705] [2022-07-22 10:14:00,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:14:00,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384270773] [2022-07-22 10:14:00,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384270773] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:14:00,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:14:00,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-22 10:14:00,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952788476] [2022-07-22 10:14:00,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:14:00,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 10:14:00,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:14:00,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 10:14:00,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:14:00,301 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:14:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:14:00,847 INFO L93 Difference]: Finished difference Result 316 states and 405 transitions. [2022-07-22 10:14:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 10:14:00,848 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-07-22 10:14:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:14:00,849 INFO L225 Difference]: With dead ends: 316 [2022-07-22 10:14:00,849 INFO L226 Difference]: Without dead ends: 290 [2022-07-22 10:14:00,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 10:14:00,850 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1056 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:14:00,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1056 Valid, 195 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:14:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-07-22 10:14:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 48. [2022-07-22 10:14:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 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) [2022-07-22 10:14:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-07-22 10:14:00,860 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2022-07-22 10:14:00,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:14:00,860 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-07-22 10:14:00,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:14:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-07-22 10:14:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 10:14:00,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:14:00,861 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:14:00,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 10:14:01,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:01,075 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:14:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:14:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash 633180131, now seen corresponding path program 3 times [2022-07-22 10:14:01,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:14:01,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185430508] [2022-07-22 10:14:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:14:01,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:14:01,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:14:01,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752487743] [2022-07-22 10:14:01,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:14:01,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:01,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:14:01,092 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:14:01,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 10:14:01,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 10:14:01,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:14:01,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:14:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:14:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-07-22 10:14:01,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:14:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-07-22 10:14:01,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:14:01,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185430508] [2022-07-22 10:14:01,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:14:01,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752487743] [2022-07-22 10:14:01,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752487743] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:14:01,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:14:01,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-22 10:14:01,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993614222] [2022-07-22 10:14:01,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:14:01,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 10:14:01,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:14:01,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 10:14:01,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-22 10:14:01,265 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:14:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:14:01,356 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2022-07-22 10:14:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 10:14:01,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-07-22 10:14:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:14:01,357 INFO L225 Difference]: With dead ends: 178 [2022-07-22 10:14:01,357 INFO L226 Difference]: Without dead ends: 165 [2022-07-22 10:14:01,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-22 10:14:01,358 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 108 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:14:01,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 71 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:14:01,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-22 10:14:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2022-07-22 10:14:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.0756302521008403) internal successors, (128), 119 states have internal predecessors, (128), 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) [2022-07-22 10:14:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 132 transitions. [2022-07-22 10:14:01,373 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 132 transitions. Word has length 49 [2022-07-22 10:14:01,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:14:01,373 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 132 transitions. [2022-07-22 10:14:01,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:14:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 132 transitions. [2022-07-22 10:14:01,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-22 10:14:01,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:14:01,375 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:14:01,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 10:14:01,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-22 10:14:01,592 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:14:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:14:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1798415483, now seen corresponding path program 4 times [2022-07-22 10:14:01,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:14:01,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305984359] [2022-07-22 10:14:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:14:01,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:14:01,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:14:01,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097446546] [2022-07-22 10:14:01,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:14:01,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:01,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:14:01,622 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:14:01,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 10:14:01,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:14:01,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:14:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:14:01,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:14:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4206 trivial. 0 not checked. [2022-07-22 10:14:01,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:14:01,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:14:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305984359] [2022-07-22 10:14:01,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:14:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097446546] [2022-07-22 10:14:01,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097446546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:14:01,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:14:01,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 10:14:01,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033873935] [2022-07-22 10:14:01,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:14:01,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 10:14:01,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:14:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 10:14:01,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 10:14:01,731 INFO L87 Difference]: Start difference. First operand 123 states and 132 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 10:14:01,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:14:01,775 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2022-07-22 10:14:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 10:14:01,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 124 [2022-07-22 10:14:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:14:01,776 INFO L225 Difference]: With dead ends: 153 [2022-07-22 10:14:01,776 INFO L226 Difference]: Without dead ends: 130 [2022-07-22 10:14:01,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:14:01,777 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:14:01,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 70 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:14:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-22 10:14:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-07-22 10:14:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.0743801652892562) internal successors, (130), 121 states have internal predecessors, (130), 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) [2022-07-22 10:14:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2022-07-22 10:14:01,791 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 124 [2022-07-22 10:14:01,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:14:01,792 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2022-07-22 10:14:01,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 10:14:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2022-07-22 10:14:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-22 10:14:01,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:14:01,793 INFO L195 NwaCegarLoop]: trace histogram [88, 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] [2022-07-22 10:14:01,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 10:14:02,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:02,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:14:02,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:14:02,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1395447138, now seen corresponding path program 1 times [2022-07-22 10:14:02,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:14:02,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483596647] [2022-07-22 10:14:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:14:02,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:14:02,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:14:02,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145072354] [2022-07-22 10:14:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:14:02,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:02,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:14:02,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:14:02,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 10:14:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:14:02,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 10:14:02,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:14:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 1591 proven. 253 refuted. 0 times theorem prover too weak. 2364 trivial. 0 not checked. [2022-07-22 10:14:02,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:14:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 1591 proven. 253 refuted. 0 times theorem prover too weak. 2364 trivial. 0 not checked. [2022-07-22 10:14:03,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:14:03,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483596647] [2022-07-22 10:14:03,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:14:03,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145072354] [2022-07-22 10:14:03,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145072354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:14:03,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:14:03,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-22 10:14:03,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050449188] [2022-07-22 10:14:03,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:14:03,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 10:14:03,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:14:03,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 10:14:03,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 10:14:03,058 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:14:04,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:14:04,800 INFO L93 Difference]: Finished difference Result 813 states and 1060 transitions. [2022-07-22 10:14:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 10:14:04,800 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 125 [2022-07-22 10:14:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:14:04,803 INFO L225 Difference]: With dead ends: 813 [2022-07-22 10:14:04,803 INFO L226 Difference]: Without dead ends: 721 [2022-07-22 10:14:04,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-07-22 10:14:04,805 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1883 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 819 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1883 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 819 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 10:14:04,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1883 Valid, 325 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [819 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 10:14:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-07-22 10:14:04,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 221. [2022-07-22 10:14:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.0414746543778801) internal successors, (226), 217 states have internal predecessors, (226), 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) [2022-07-22 10:14:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2022-07-22 10:14:04,832 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 125 [2022-07-22 10:14:04,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:14:04,833 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2022-07-22 10:14:04,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:14:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2022-07-22 10:14:04,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-22 10:14:04,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:14:04,837 INFO L195 NwaCegarLoop]: trace histogram [184, 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] [2022-07-22 10:14:04,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 10:14:05,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 10:14:05,057 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:14:05,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:14:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash -387556706, now seen corresponding path program 2 times [2022-07-22 10:14:05,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:14:05,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155742308] [2022-07-22 10:14:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:14:05,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:14:05,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:14:05,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465465929] [2022-07-22 10:14:05,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:14:05,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:05,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:14:05,107 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:14:05,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 10:14:05,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:14:05,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:14:05,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-22 10:14:05,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:14:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17600 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 9888 trivial. 0 not checked. [2022-07-22 10:14:06,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:14:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17600 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 9888 trivial. 0 not checked. [2022-07-22 10:14:08,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:14:08,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155742308] [2022-07-22 10:14:08,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:14:08,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465465929] [2022-07-22 10:14:08,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465465929] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:14:08,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:14:08,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-07-22 10:14:08,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638245021] [2022-07-22 10:14:08,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:14:08,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-22 10:14:08,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:14:08,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-22 10:14:08,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-07-22 10:14:08,717 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 98 states have internal predecessors, (120), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:14:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:14:19,521 INFO L93 Difference]: Finished difference Result 1605 states and 2092 transitions. [2022-07-22 10:14:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-22 10:14:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 98 states have internal predecessors, (120), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 221 [2022-07-22 10:14:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:14:19,526 INFO L225 Difference]: With dead ends: 1605 [2022-07-22 10:14:19,526 INFO L226 Difference]: Without dead ends: 1441 [2022-07-22 10:14:19,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-07-22 10:14:19,531 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3976 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 3031 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3976 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 3614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3031 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 10:14:19,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3976 Valid, 611 Invalid, 3614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3031 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 10:14:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2022-07-22 10:14:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 413. [2022-07-22 10:14:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 409 states have (on average 1.02200488997555) internal successors, (418), 409 states have internal predecessors, (418), 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) [2022-07-22 10:14:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 422 transitions. [2022-07-22 10:14:19,579 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 422 transitions. Word has length 221 [2022-07-22 10:14:19,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:14:19,579 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 422 transitions. [2022-07-22 10:14:19,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 98 states have internal predecessors, (120), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:14:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 422 transitions. [2022-07-22 10:14:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2022-07-22 10:14:19,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:14:19,583 INFO L195 NwaCegarLoop]: trace histogram [376, 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] [2022-07-22 10:14:19,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 10:14:19,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 10:14:19,803 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:14:19,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:14:19,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1904821602, now seen corresponding path program 3 times [2022-07-22 10:14:19,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:14:19,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843634304] [2022-07-22 10:14:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:14:19,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:14:19,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:14:19,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190225309] [2022-07-22 10:14:19,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:14:19,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:19,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:14:19,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:14:19,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 10:14:20,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 10:14:20,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:14:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:14:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:14:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 72032 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 72031 trivial. 0 not checked. [2022-07-22 10:14:20,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:14:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72032 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 72031 trivial. 0 not checked. [2022-07-22 10:14:20,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:14:20,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843634304] [2022-07-22 10:14:20,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:14:20,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190225309] [2022-07-22 10:14:20,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190225309] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:14:20,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:14:20,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-22 10:14:20,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627404247] [2022-07-22 10:14:20,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:14:20,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 10:14:20,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:14:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 10:14:20,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-22 10:14:20,926 INFO L87 Difference]: Start difference. First operand 413 states and 422 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:14:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:14:21,108 INFO L93 Difference]: Finished difference Result 555 states and 575 transitions. [2022-07-22 10:14:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 10:14:21,108 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 413 [2022-07-22 10:14:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:14:21,110 INFO L225 Difference]: With dead ends: 555 [2022-07-22 10:14:21,110 INFO L226 Difference]: Without dead ends: 546 [2022-07-22 10:14:21,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-22 10:14:21,111 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 143 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:14:21,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 57 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:14:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-07-22 10:14:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 425. [2022-07-22 10:14:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.0285035629453683) internal successors, (433), 421 states have internal predecessors, (433), 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) [2022-07-22 10:14:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 437 transitions. [2022-07-22 10:14:21,173 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 437 transitions. Word has length 413 [2022-07-22 10:14:21,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:14:21,174 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 437 transitions. [2022-07-22 10:14:21,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 10:14:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 437 transitions. [2022-07-22 10:14:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-07-22 10:14:21,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:14:21,178 INFO L195 NwaCegarLoop]: trace histogram [376, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:14:21,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 10:14:21,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 10:14:21,385 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:14:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:14:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash 755995755, now seen corresponding path program 4 times [2022-07-22 10:14:21,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:14:21,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490502828] [2022-07-22 10:14:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:14:21,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:14:21,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:14:21,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118824995] [2022-07-22 10:14:21,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:14:21,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:21,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:14:21,463 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:14:21,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 10:14:21,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:14:21,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:14:21,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 10:14:21,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:14:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 72074 backedges. 40 proven. 54169 refuted. 0 times theorem prover too weak. 17865 trivial. 0 not checked. [2022-07-22 10:14:23,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:14:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 72074 backedges. 40 proven. 54169 refuted. 0 times theorem prover too weak. 17865 trivial. 0 not checked. [2022-07-22 10:14:24,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:14:24,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490502828] [2022-07-22 10:14:24,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:14:24,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118824995] [2022-07-22 10:14:24,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118824995] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:14:24,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:14:24,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-07-22 10:14:24,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691821999] [2022-07-22 10:14:24,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:14:24,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 10:14:24,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:14:24,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 10:14:24,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:14:24,498 INFO L87 Difference]: Start difference. First operand 425 states and 437 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 10:14:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:14:25,024 INFO L93 Difference]: Finished difference Result 695 states and 724 transitions. [2022-07-22 10:14:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 10:14:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 425 [2022-07-22 10:14:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:14:25,028 INFO L225 Difference]: With dead ends: 695 [2022-07-22 10:14:25,029 INFO L226 Difference]: Without dead ends: 668 [2022-07-22 10:14:25,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 823 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=335, Invalid=1071, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 10:14:25,030 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 289 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:14:25,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 144 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:14:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-07-22 10:14:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 522. [2022-07-22 10:14:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 518 states have (on average 1.0250965250965252) internal successors, (531), 518 states have internal predecessors, (531), 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) [2022-07-22 10:14:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 535 transitions. [2022-07-22 10:14:25,091 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 535 transitions. Word has length 425 [2022-07-22 10:14:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:14:25,092 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 535 transitions. [2022-07-22 10:14:25,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 10:14:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 535 transitions. [2022-07-22 10:14:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-07-22 10:14:25,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:14:25,094 INFO L195 NwaCegarLoop]: trace histogram [470, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:14:25,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 10:14:25,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 10:14:25,310 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:14:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:14:25,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1331553155, now seen corresponding path program 5 times [2022-07-22 10:14:25,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:14:25,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442395903] [2022-07-22 10:14:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:14:25,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:14:25,404 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:14:25,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015528998] [2022-07-22 10:14:25,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:14:25,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:14:25,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:14:25,406 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:14:25,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process