./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array8_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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-patterns/array8_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:28:44,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:28:44,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:28:44,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:28:44,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:28:44,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:28:44,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:28:44,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:28:44,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:28:44,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:28:44,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:28:44,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:28:44,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:28:44,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:28:44,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:28:44,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:28:44,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:28:44,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:28:44,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:28:44,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:28:44,565 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:28:44,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:28:44,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:28:44,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:28:44,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:28:44,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:28:44,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:28:44,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:28:44,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:28:44,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:28:44,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:28:44,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:28:44,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:28:44,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:28:44,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:28:44,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:28:44,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:28:44,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:28:44,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:28:44,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:28:44,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:28:44,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:28:44,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:28:44,611 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:28:44,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:28:44,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:28:44,612 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:28:44,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:28:44,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:28:44,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:28:44,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:28:44,614 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:28:44,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:28:44,615 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:28:44,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:28:44,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:28:44,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:28:44,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:28:44,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:28:44,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:28:44,616 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:28:44,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:28:44,617 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:28:44,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:28:44,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:28:44,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:28:44,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:28:44,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:28:44,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:28:44,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:28:44,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:28:44,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:28:44,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:28:44,619 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:28:44,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:28:44,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:28:44,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 [2022-07-22 10:28:44,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:28:44,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:28:44,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:28:44,852 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:28:44,852 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:28:44,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array8_pattern.c [2022-07-22 10:28:44,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f466ce9/be235a20e6f34091b64c70454ff03eb4/FLAGba3470057 [2022-07-22 10:28:45,310 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:28:45,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c [2022-07-22 10:28:45,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f466ce9/be235a20e6f34091b64c70454ff03eb4/FLAGba3470057 [2022-07-22 10:28:45,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f466ce9/be235a20e6f34091b64c70454ff03eb4 [2022-07-22 10:28:45,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:28:45,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:28:45,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:28:45,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:28:45,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:28:45,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:45,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75eaa0ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45, skipping insertion in model container [2022-07-22 10:28:45,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:45,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:28:45,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:28:45,882 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2022-07-22 10:28:45,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:28:45,916 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:28:45,929 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2022-07-22 10:28:45,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:28:45,967 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:28:45,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45 WrapperNode [2022-07-22 10:28:45,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:28:45,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:28:45,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:28:45,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:28:45,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:45,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:46,014 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-07-22 10:28:46,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:28:46,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:28:46,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:28:46,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:28:46,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:46,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:46,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:46,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:46,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:46,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:46,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:46,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:28:46,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:28:46,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:28:46,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:28:46,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45" (1/1) ... [2022-07-22 10:28:46,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:28:46,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:28:46,097 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 10:28:46,118 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 10:28:46,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:28:46,138 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 10:28:46,138 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 10:28:46,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:28:46,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 10:28:46,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:28:46,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:28:46,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:28:46,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:28:46,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 10:28:46,205 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:28:46,206 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:28:46,399 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:28:46,405 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:28:46,410 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 10:28:46,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:28:46 BoogieIcfgContainer [2022-07-22 10:28:46,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:28:46,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:28:46,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:28:46,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:28:46,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:28:45" (1/3) ... [2022-07-22 10:28:46,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f29c5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:28:46, skipping insertion in model container [2022-07-22 10:28:46,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:28:45" (2/3) ... [2022-07-22 10:28:46,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f29c5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:28:46, skipping insertion in model container [2022-07-22 10:28:46,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:28:46" (3/3) ... [2022-07-22 10:28:46,443 INFO L111 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2022-07-22 10:28:46,472 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:28:46,472 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:28:46,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:28:46,549 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@6b3c0650, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3418ed2f [2022-07-22 10:28:46,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:28:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:28:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 10:28:46,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:28:46,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:28:46,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:28:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:28:46,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1127586545, now seen corresponding path program 1 times [2022-07-22 10:28:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:28:46,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283943] [2022-07-22 10:28:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:28:46,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:28:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:28:46,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:28:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:28:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:28:46,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:28:46,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283943] [2022-07-22 10:28:46,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:28:46,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:28:46,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:28:46,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28993349] [2022-07-22 10:28:46,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:28:46,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:28:46,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:28:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:28:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:28:46,798 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 10:28:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:28:46,814 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2022-07-22 10:28:46,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:28:46,816 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-22 10:28:46,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:28:46,822 INFO L225 Difference]: With dead ends: 53 [2022-07-22 10:28:46,822 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 10:28:46,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:28:46,828 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:28:46,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:28:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 10:28:46,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-22 10:28:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:28:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-22 10:28:46,859 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2022-07-22 10:28:46,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:28:46,860 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-22 10:28:46,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 10:28:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-22 10:28:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 10:28:46,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:28:46,862 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 10:28:46,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 10:28:46,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:28:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:28:46,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1008571545, now seen corresponding path program 1 times [2022-07-22 10:28:46,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:28:46,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013196333] [2022-07-22 10:28:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:28:46,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:28:46,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:28:46,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537160774] [2022-07-22 10:28:46,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:28:46,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:28:46,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:28:46,897 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 10:28:46,911 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 10:28:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:28:46,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 10:28:46,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:28:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:28:47,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:28:47,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:28:47,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013196333] [2022-07-22 10:28:47,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:28:47,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537160774] [2022-07-22 10:28:47,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537160774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:28:47,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:28:47,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 10:28:47,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173870330] [2022-07-22 10:28:47,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:28:47,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 10:28:47,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:28:47,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 10:28:47,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 10:28:47,068 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:28:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:28:47,147 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-22 10:28:47,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 10:28:47,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-07-22 10:28:47,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:28:47,150 INFO L225 Difference]: With dead ends: 50 [2022-07-22 10:28:47,150 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 10:28:47,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:28:47,152 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:28:47,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 60 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:28:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 10:28:47,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-07-22 10:28:47,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:28:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-22 10:28:47,159 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2022-07-22 10:28:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:28:47,159 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-22 10:28:47,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:28:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-22 10:28:47,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 10:28:47,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:28:47,161 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, 1, 1, 1, 1] [2022-07-22 10:28:47,190 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 10:28:47,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:28:47,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:28:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:28:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1890411897, now seen corresponding path program 1 times [2022-07-22 10:28:47,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:28:47,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981835693] [2022-07-22 10:28:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:28:47,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:28:47,414 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:28:47,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499334860] [2022-07-22 10:28:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:28:47,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:28:47,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:28:47,417 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 10:28:47,419 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 10:28:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:28:47,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 10:28:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:28:47,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:28:47,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:28:47,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-07-22 10:28:47,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-22 10:28:48,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 10:28:48,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:28:48,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2022-07-22 10:28:48,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:28:48,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 12 [2022-07-22 10:28:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:28:48,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:28:48,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:28:48,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981835693] [2022-07-22 10:28:48,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:28:48,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499334860] [2022-07-22 10:28:48,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499334860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:28:48,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 10:28:48,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-22 10:28:48,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292069814] [2022-07-22 10:28:48,774 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 10:28:48,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 10:28:48,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:28:48,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 10:28:48,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:28:48,776 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:28:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:28:49,076 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-07-22 10:28:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 10:28:49,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-07-22 10:28:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:28:49,078 INFO L225 Difference]: With dead ends: 70 [2022-07-22 10:28:49,079 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 10:28:49,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2022-07-22 10:28:49,080 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:28:49,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 148 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 85 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-07-22 10:28:49,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 10:28:49,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-07-22 10:28:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:28:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-07-22 10:28:49,093 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 29 [2022-07-22 10:28:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:28:49,093 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-07-22 10:28:49,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:28:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-07-22 10:28:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 10:28:49,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:28:49,095 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:28:49,121 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 10:28:49,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 10:28:49,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:28:49,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:28:49,312 INFO L85 PathProgramCache]: Analyzing trace with hash -32099493, now seen corresponding path program 2 times [2022-07-22 10:28:49,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:28:49,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697687091] [2022-07-22 10:28:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:28:49,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:28:49,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:28:49,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589381355] [2022-07-22 10:28:49,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:28:49,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:28:49,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:28:49,351 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 10:28:49,353 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 10:28:49,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:28:49,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:28:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 10:28:49,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:28:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:28:49,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:28:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:28:49,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:28:49,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697687091] [2022-07-22 10:28:49,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:28:49,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589381355] [2022-07-22 10:28:49,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589381355] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:28:49,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:28:49,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-22 10:28:49,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950865811] [2022-07-22 10:28:49,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:28:49,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 10:28:49,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:28:49,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 10:28:49,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:28:49,499 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:28:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:28:49,588 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-07-22 10:28:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 10:28:49,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-07-22 10:28:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:28:49,590 INFO L225 Difference]: With dead ends: 61 [2022-07-22 10:28:49,590 INFO L226 Difference]: Without dead ends: 40 [2022-07-22 10:28:49,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-22 10:28:49,592 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:28:49,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 110 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:28:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-22 10:28:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-07-22 10:28:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:28:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-07-22 10:28:49,597 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 31 [2022-07-22 10:28:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:28:49,598 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-07-22 10:28:49,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:28:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-07-22 10:28:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 10:28:49,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:28:49,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:28:49,624 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 10:28:49,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:28:49,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:28:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:28:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1857874167, now seen corresponding path program 3 times [2022-07-22 10:28:49,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:28:49,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387001484] [2022-07-22 10:28:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:28:49,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:28:49,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:28:49,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274411198] [2022-07-22 10:28:49,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:28:49,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:28:49,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:28:49,853 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 10:28:49,880 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 10:28:49,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 10:28:49,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:28:49,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 10:28:49,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:28:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:28:50,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:28:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:28:50,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:28:50,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387001484] [2022-07-22 10:28:50,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:28:50,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274411198] [2022-07-22 10:28:50,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274411198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:28:50,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:28:50,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-22 10:28:50,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635488071] [2022-07-22 10:28:50,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:28:50,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 10:28:50,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:28:50,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 10:28:50,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:28:50,049 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:28:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:28:50,137 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-07-22 10:28:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 10:28:50,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-07-22 10:28:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:28:50,139 INFO L225 Difference]: With dead ends: 39 [2022-07-22 10:28:50,139 INFO L226 Difference]: Without dead ends: 35 [2022-07-22 10:28:50,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:28:50,143 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:28:50,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 91 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:28:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-22 10:28:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-07-22 10:28:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:28:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-07-22 10:28:50,157 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 31 [2022-07-22 10:28:50,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:28:50,157 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-07-22 10:28:50,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:28:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-07-22 10:28:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 10:28:50,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:28:50,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:28:50,189 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 10:28:50,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:28:50,382 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:28:50,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:28:50,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1236086951, now seen corresponding path program 4 times [2022-07-22 10:28:50,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:28:50,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952875759] [2022-07-22 10:28:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:28:50,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:28:50,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:28:50,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567203611] [2022-07-22 10:28:50,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:28:50,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:28:50,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:28:50,416 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 10:28:50,417 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 10:28:50,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:28:50,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:28:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 10:28:50,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:28:50,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:28:50,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:28:50,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-07-22 10:28:50,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-22 10:28:50,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:28:50,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-07-22 10:28:51,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:28:51,747 INFO L356 Elim1Store]: treesize reduction 30, result has 42.3 percent of original size [2022-07-22 10:28:51,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 67 [2022-07-22 10:28:53,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:28:53,487 INFO L356 Elim1Store]: treesize reduction 135, result has 35.1 percent of original size [2022-07-22 10:28:53,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 124 treesize of output 167 [2022-07-22 10:28:56,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:28:57,002 INFO L356 Elim1Store]: treesize reduction 246, result has 63.1 percent of original size [2022-07-22 10:28:57,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 2 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 47 case distinctions, treesize of input 226 treesize of output 540 [2022-07-22 10:29:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:29:33,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:29:44,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:29:44,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952875759] [2022-07-22 10:29:44,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:29:44,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567203611] [2022-07-22 10:29:44,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567203611] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:29:44,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 10:29:44,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-22 10:29:44,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078866076] [2022-07-22 10:29:44,258 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 10:29:44,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 10:29:44,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:29:44,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 10:29:44,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=952, Unknown=7, NotChecked=0, Total=1122 [2022-07-22 10:29:44,259 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:29:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:29:44,837 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-07-22 10:29:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 10:29:44,837 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-07-22 10:29:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:29:44,838 INFO L225 Difference]: With dead ends: 57 [2022-07-22 10:29:44,838 INFO L226 Difference]: Without dead ends: 53 [2022-07-22 10:29:44,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=220, Invalid=1255, Unknown=7, NotChecked=0, Total=1482 [2022-07-22 10:29:44,840 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:29:44,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 224 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-07-22 10:29:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-22 10:29:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2022-07-22 10:29:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:29:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-07-22 10:29:44,849 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 33 [2022-07-22 10:29:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:29:44,849 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-07-22 10:29:44,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:29:44,850 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-07-22 10:29:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 10:29:44,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:29:44,850 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:29:44,876 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 10:29:45,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:29:45,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:29:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:29:45,069 INFO L85 PathProgramCache]: Analyzing trace with hash -977921513, now seen corresponding path program 1 times [2022-07-22 10:29:45,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:29:45,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659961483] [2022-07-22 10:29:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:29:45,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:29:45,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:29:45,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510029079] [2022-07-22 10:29:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:29:45,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:29:45,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:29:45,104 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 10:29:45,110 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 10:29:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:29:45,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 10:29:45,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:29:45,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:29:45,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:45,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-07-22 10:29:45,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-22 10:29:45,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-22 10:29:45,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-22 10:29:45,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:45,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-07-22 10:29:45,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:45,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:45,711 INFO L356 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2022-07-22 10:29:45,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 68 [2022-07-22 10:29:47,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:47,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:47,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:47,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:47,049 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-07-22 10:29:47,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 96 [2022-07-22 10:29:47,749 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:29:47,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 126 treesize of output 122 [2022-07-22 10:29:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:29:47,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:29:55,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:29:55,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659961483] [2022-07-22 10:29:55,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:29:55,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510029079] [2022-07-22 10:29:55,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510029079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:29:55,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 10:29:55,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-22 10:29:55,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112017799] [2022-07-22 10:29:55,419 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 10:29:55,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 10:29:55,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:29:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 10:29:55,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=630, Unknown=2, NotChecked=0, Total=756 [2022-07-22 10:29:55,420 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:29:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:29:56,375 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-07-22 10:29:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 10:29:56,375 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-07-22 10:29:56,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:29:56,376 INFO L225 Difference]: With dead ends: 70 [2022-07-22 10:29:56,376 INFO L226 Difference]: Without dead ends: 66 [2022-07-22 10:29:56,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=158, Invalid=831, Unknown=3, NotChecked=0, Total=992 [2022-07-22 10:29:56,378 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:29:56,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 211 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-07-22 10:29:56,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-22 10:29:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2022-07-22 10:29:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:29:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-07-22 10:29:56,388 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 33 [2022-07-22 10:29:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:29:56,388 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-07-22 10:29:56,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:29:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-07-22 10:29:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 10:29:56,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:29:56,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:29:56,407 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 10:29:56,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:29:56,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:29:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:29:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1879614779, now seen corresponding path program 5 times [2022-07-22 10:29:56,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:29:56,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988873644] [2022-07-22 10:29:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:29:56,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:29:56,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:29:56,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358941703] [2022-07-22 10:29:56,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:29:56,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:29:56,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:29:56,617 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 10:29:56,636 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 10:29:56,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 10:29:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:29:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:29:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:29:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:29:56,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:29:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:29:56,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:29:56,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988873644] [2022-07-22 10:29:56,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:29:56,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358941703] [2022-07-22 10:29:56,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358941703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:29:56,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:29:56,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-22 10:29:56,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251194995] [2022-07-22 10:29:56,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:29:56,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 10:29:56,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:29:56,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 10:29:56,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-22 10:29:56,825 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:29:56,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:29:56,971 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-07-22 10:29:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 10:29:56,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-07-22 10:29:56,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:29:56,973 INFO L225 Difference]: With dead ends: 103 [2022-07-22 10:29:56,973 INFO L226 Difference]: Without dead ends: 91 [2022-07-22 10:29:56,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-22 10:29:56,974 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:29:56,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 127 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:29:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-22 10:29:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2022-07-22 10:29:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 10:29:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2022-07-22 10:29:56,989 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 35 [2022-07-22 10:29:56,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:29:56,989 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2022-07-22 10:29:56,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:29:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2022-07-22 10:29:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 10:29:56,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:29:56,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:29:57,009 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 10:29:57,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:29:57,196 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:29:57,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:29:57,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1081807417, now seen corresponding path program 6 times [2022-07-22 10:29:57,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:29:57,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816873362] [2022-07-22 10:29:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:29:57,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:29:57,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:29:57,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533567738] [2022-07-22 10:29:57,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:29:57,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:29:57,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:29:57,216 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 10:29:57,243 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 10:29:57,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-22 10:29:57,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:29:57,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-22 10:29:57,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:29:57,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:29:57,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:57,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-07-22 10:29:57,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-22 10:29:57,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-22 10:29:57,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-22 10:29:57,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:57,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:57,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-07-22 10:29:57,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:57,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:57,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:57,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:57,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:57,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-07-22 10:29:58,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,059 INFO L356 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2022-07-22 10:29:58,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 98 [2022-07-22 10:29:58,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:58,293 INFO L356 Elim1Store]: treesize reduction 164, result has 13.7 percent of original size [2022-07-22 10:29:58,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 103 treesize of output 112 [2022-07-22 10:29:59,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:59,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:29:59,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:29:59,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 49 [2022-07-22 10:29:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:29:59,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:03,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:03,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816873362] [2022-07-22 10:30:03,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:30:03,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533567738] [2022-07-22 10:30:03,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533567738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:03,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 10:30:03,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-07-22 10:30:03,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233471419] [2022-07-22 10:30:03,674 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:03,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 10:30:03,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:03,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 10:30:03,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=894, Unknown=1, NotChecked=0, Total=1056 [2022-07-22 10:30:03,675 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:30:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:07,736 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2022-07-22 10:30:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 10:30:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-07-22 10:30:07,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:07,738 INFO L225 Difference]: With dead ends: 100 [2022-07-22 10:30:07,738 INFO L226 Difference]: Without dead ends: 96 [2022-07-22 10:30:07,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=319, Invalid=1568, Unknown=5, NotChecked=0, Total=1892 [2022-07-22 10:30:07,739 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:07,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 320 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 492 Invalid, 0 Unknown, 38 Unchecked, 0.5s Time] [2022-07-22 10:30:07,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-22 10:30:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2022-07-22 10:30:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 10:30:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-07-22 10:30:07,756 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 37 [2022-07-22 10:30:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:07,757 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-07-22 10:30:07,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:30:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-07-22 10:30:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 10:30:07,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:07,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:07,766 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 10:30:07,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 10:30:07,966 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash 70690167, now seen corresponding path program 2 times [2022-07-22 10:30:07,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:07,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372390480] [2022-07-22 10:30:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:07,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:07,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:30:07,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577890050] [2022-07-22 10:30:07,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:30:07,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:07,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:07,995 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 10:30:07,996 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 10:30:08,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:30:08,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:08,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-22 10:30:08,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:08,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:30:08,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:08,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-07-22 10:30:08,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-22 10:30:08,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:30:08,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:08,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:08,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-07-22 10:30:08,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:08,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:08,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:08,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:08,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-07-22 10:30:13,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:13,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:13,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:13,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:13,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:13,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:13,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:13,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:13,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:13,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:13,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:30:13,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:30:13,874 INFO L356 Elim1Store]: treesize reduction 350, result has 30.6 percent of original size [2022-07-22 10:30:13,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 10 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 116 treesize of output 228 [2022-07-22 10:30:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:16,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:16,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:16,812 INFO L356 Elim1Store]: treesize reduction 150, result has 32.7 percent of original size [2022-07-22 10:30:16,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 185 [2022-07-22 10:30:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:18,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:18,192 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:30:18,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 161 treesize of output 261 [2022-07-22 10:30:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:30:20,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:21,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:21,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372390480] [2022-07-22 10:30:21,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:30:21,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577890050] [2022-07-22 10:30:21,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577890050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:21,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 10:30:21,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-22 10:30:21,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234427405] [2022-07-22 10:30:21,654 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:21,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 10:30:21,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:21,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 10:30:21,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1204, Unknown=4, NotChecked=0, Total=1406 [2022-07-22 10:30:21,660 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:30:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:22,854 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2022-07-22 10:30:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 10:30:22,854 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-07-22 10:30:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:22,855 INFO L225 Difference]: With dead ends: 109 [2022-07-22 10:30:22,855 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 10:30:22,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=216, Invalid=1339, Unknown=5, NotChecked=0, Total=1560 [2022-07-22 10:30:22,857 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:22,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 286 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-07-22 10:30:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 10:30:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2022-07-22 10:30:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 79 states have internal predecessors, (92), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 10:30:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2022-07-22 10:30:22,874 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 37 [2022-07-22 10:30:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:22,874 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2022-07-22 10:30:22,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:30:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2022-07-22 10:30:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 10:30:22,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:22,876 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:22,894 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 10:30:23,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 10:30:23,079 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:23,080 INFO L85 PathProgramCache]: Analyzing trace with hash 288075803, now seen corresponding path program 7 times [2022-07-22 10:30:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253778025] [2022-07-22 10:30:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:23,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:23,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:30:23,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559500169] [2022-07-22 10:30:23,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:30:23,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:23,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:23,111 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 10:30:23,114 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 10:30:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:23,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:30:23,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:30:23,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:30:23,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:23,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253778025] [2022-07-22 10:30:23,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:30:23,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559500169] [2022-07-22 10:30:23,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559500169] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:23,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:30:23,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-22 10:30:23,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327391779] [2022-07-22 10:30:23,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:23,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 10:30:23,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:23,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 10:30:23,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-22 10:30:23,335 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:30:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:23,634 INFO L93 Difference]: Finished difference Result 156 states and 171 transitions. [2022-07-22 10:30:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 10:30:23,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-22 10:30:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:23,636 INFO L225 Difference]: With dead ends: 156 [2022-07-22 10:30:23,636 INFO L226 Difference]: Without dead ends: 142 [2022-07-22 10:30:23,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2022-07-22 10:30:23,637 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 157 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:23,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 142 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:30:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-22 10:30:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2022-07-22 10:30:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 95 states have (on average 1.168421052631579) internal successors, (111), 95 states have internal predecessors, (111), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 10:30:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2022-07-22 10:30:23,660 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 39 [2022-07-22 10:30:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:23,661 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2022-07-22 10:30:23,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:30:23,661 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2022-07-22 10:30:23,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 10:30:23,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:23,666 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:23,693 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 10:30:23,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 10:30:23,890 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:23,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:23,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2118006027, now seen corresponding path program 3 times [2022-07-22 10:30:23,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:23,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822715007] [2022-07-22 10:30:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:23,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:23,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:30:23,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445577457] [2022-07-22 10:30:23,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:30:23,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:23,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:23,915 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 10:30:23,920 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 10:30:24,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 10:30:24,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:24,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:30:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:30:24,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:30:24,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:24,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822715007] [2022-07-22 10:30:24,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:30:24,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445577457] [2022-07-22 10:30:24,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445577457] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:24,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:30:24,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-22 10:30:24,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624424118] [2022-07-22 10:30:24,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:24,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 10:30:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 10:30:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-22 10:30:24,182 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:30:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:24,421 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2022-07-22 10:30:24,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 10:30:24,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-22 10:30:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:24,422 INFO L225 Difference]: With dead ends: 137 [2022-07-22 10:30:24,422 INFO L226 Difference]: Without dead ends: 133 [2022-07-22 10:30:24,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-07-22 10:30:24,423 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:24,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 154 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:30:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-22 10:30:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 96. [2022-07-22 10:30:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 83 states have internal predecessors, (96), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 10:30:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2022-07-22 10:30:24,442 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 39 [2022-07-22 10:30:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:24,442 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2022-07-22 10:30:24,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:30:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2022-07-22 10:30:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 10:30:24,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:24,443 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:24,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-22 10:30:24,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 10:30:24,646 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:24,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1485008409, now seen corresponding path program 8 times [2022-07-22 10:30:24,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:24,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269837038] [2022-07-22 10:30:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:24,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:24,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:30:24,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12447022] [2022-07-22 10:30:24,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:30:24,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:24,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:24,675 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 10:30:24,680 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 10:30:24,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:30:24,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:24,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-22 10:30:24,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:24,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:30:24,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:24,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-07-22 10:30:24,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-07-22 10:30:24,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-22 10:30:24,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-22 10:30:24,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:24,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:24,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-07-22 10:30:24,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:24,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:24,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:24,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:24,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:24,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:24,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2022-07-22 10:30:25,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 103 [2022-07-22 10:30:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:25,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:26,010 INFO L356 Elim1Store]: treesize reduction 90, result has 39.6 percent of original size [2022-07-22 10:30:26,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 128 [2022-07-22 10:30:28,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:28,129 INFO L356 Elim1Store]: treesize reduction 106, result has 13.8 percent of original size [2022-07-22 10:30:28,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 130 [2022-07-22 10:30:35,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 45 [2022-07-22 10:30:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:30:35,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:39,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:39,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269837038] [2022-07-22 10:30:39,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:30:39,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12447022] [2022-07-22 10:30:39,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12447022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:39,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 10:30:39,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-07-22 10:30:39,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285053781] [2022-07-22 10:30:39,909 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:39,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 10:30:39,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:39,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 10:30:39,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1505, Unknown=12, NotChecked=0, Total=1722 [2022-07-22 10:30:39,911 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:30:43,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:43,172 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2022-07-22 10:30:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 10:30:43,172 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-07-22 10:30:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:43,173 INFO L225 Difference]: With dead ends: 136 [2022-07-22 10:30:43,173 INFO L226 Difference]: Without dead ends: 132 [2022-07-22 10:30:43,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=277, Invalid=1965, Unknown=14, NotChecked=0, Total=2256 [2022-07-22 10:30:43,175 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:43,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 356 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 679 Invalid, 0 Unknown, 138 Unchecked, 0.8s Time] [2022-07-22 10:30:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-22 10:30:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2022-07-22 10:30:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 97 states have internal predecessors, (113), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 10:30:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2022-07-22 10:30:43,204 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 41 [2022-07-22 10:30:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:43,205 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2022-07-22 10:30:43,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:30:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2022-07-22 10:30:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 10:30:43,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:43,206 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:43,231 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 10:30:43,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 10:30:43,420 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash 463940055, now seen corresponding path program 4 times [2022-07-22 10:30:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:43,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429828255] [2022-07-22 10:30:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:43,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:43,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:30:43,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748508365] [2022-07-22 10:30:43,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:30:43,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:43,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:43,445 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 10:30:43,447 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 10:30:43,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:30:43,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:43,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-22 10:30:43,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:43,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:30:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-07-22 10:30:43,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-22 10:30:43,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:30:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-07-22 10:30:43,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2022-07-22 10:30:43,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:43,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:44,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:44,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:44,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:44,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:44,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:44,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:44,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:44,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:44,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 95 [2022-07-22 10:30:46,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:46,954 INFO L356 Elim1Store]: treesize reduction 98, result has 40.6 percent of original size [2022-07-22 10:30:46,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 140 [2022-07-22 10:30:47,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:30:48,020 INFO L356 Elim1Store]: treesize reduction 654, result has 22.5 percent of original size [2022-07-22 10:30:48,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 5 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 236 treesize of output 385 [2022-07-22 10:31:47,222 WARN L233 SmtUtils]: Spent 46.74s on a formula simplification. DAG size of input: 370 DAG size of output: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 10:31:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:31:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:31:51,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:31:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:31:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:31:52,211 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:31:52,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 7 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 78 case distinctions, treesize of input 314 treesize of output 1206