./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.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/nla-digbench/egcd2-ll.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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:38:45,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:38:45,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:38:45,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:38:45,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:38:45,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:38:45,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:38:45,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:38:45,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:38:45,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:38:45,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:38:45,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:38:45,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:38:45,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:38:45,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:38:45,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:38:45,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:38:45,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:38:45,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:38:45,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:38:45,496 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:38:45,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:38:45,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:38:45,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:38:45,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:38:45,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:38:45,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:38:45,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:38:45,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:38:45,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:38:45,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:38:45,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:38:45,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:38:45,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:38:45,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:38:45,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:38:45,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:38:45,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:38:45,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:38:45,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:38:45,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:38:45,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:38:45,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:38:45,551 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:38:45,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:38:45,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:38:45,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:38:45,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:38:45,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:38:45,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:38:45,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:38:45,554 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:38:45,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:38:45,555 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:38:45,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:38:45,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:38:45,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:38:45,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:38:45,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:38:45,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:38:45,556 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:38:45,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:38:45,556 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:38:45,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:38:45,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:38:45,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:38:45,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:38:45,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:38:45,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:38:45,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:38:45,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:38:45,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:38:45,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:38:45,559 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:38:45,559 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:38:45,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:38:45,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2022-07-22 15:38:45,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:38:45,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:38:45,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:38:45,806 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:38:45,807 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:38:45,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2022-07-22 15:38:45,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bba361e/f725912bacfe4cada904e147986f030a/FLAG9bba9339a [2022-07-22 15:38:46,335 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:38:46,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2022-07-22 15:38:46,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bba361e/f725912bacfe4cada904e147986f030a/FLAG9bba9339a [2022-07-22 15:38:46,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bba361e/f725912bacfe4cada904e147986f030a [2022-07-22 15:38:46,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:38:46,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:38:46,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:38:46,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:38:46,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:38:46,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:38:46" (1/1) ... [2022-07-22 15:38:46,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d1ff93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:46, skipping insertion in model container [2022-07-22 15:38:46,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:38:46" (1/1) ... [2022-07-22 15:38:46,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:38:46,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:38:46,963 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/nla-digbench/egcd2-ll.c[490,503] [2022-07-22 15:38:47,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:38:47,009 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:38:47,021 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/nla-digbench/egcd2-ll.c[490,503] [2022-07-22 15:38:47,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:38:47,058 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:38:47,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47 WrapperNode [2022-07-22 15:38:47,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:38:47,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:38:47,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:38:47,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:38:47,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47" (1/1) ... [2022-07-22 15:38:47,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47" (1/1) ... [2022-07-22 15:38:47,098 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2022-07-22 15:38:47,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:38:47,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:38:47,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:38:47,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:38:47,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47" (1/1) ... [2022-07-22 15:38:47,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47" (1/1) ... [2022-07-22 15:38:47,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47" (1/1) ... [2022-07-22 15:38:47,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47" (1/1) ... [2022-07-22 15:38:47,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47" (1/1) ... [2022-07-22 15:38:47,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47" (1/1) ... [2022-07-22 15:38:47,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47" (1/1) ... [2022-07-22 15:38:47,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:38:47,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:38:47,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:38:47,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:38:47,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47" (1/1) ... [2022-07-22 15:38:47,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:38:47,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:47,172 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 15:38:47,195 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 15:38:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:38:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 15:38:47,211 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 15:38:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:38:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:38:47,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:38:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 15:38:47,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 15:38:47,264 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:38:47,265 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:38:47,431 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:38:47,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:38:47,451 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 15:38:47,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:38:47 BoogieIcfgContainer [2022-07-22 15:38:47,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:38:47,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:38:47,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:38:47,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:38:47,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:38:46" (1/3) ... [2022-07-22 15:38:47,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44759b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:38:47, skipping insertion in model container [2022-07-22 15:38:47,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:38:47" (2/3) ... [2022-07-22 15:38:47,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44759b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:38:47, skipping insertion in model container [2022-07-22 15:38:47,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:38:47" (3/3) ... [2022-07-22 15:38:47,461 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2022-07-22 15:38:47,488 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:38:47,488 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:38:47,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:38:47,565 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@9029274, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5acbc376 [2022-07-22 15:38:47,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:38:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 15:38:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 15:38:47,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:47,578 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:47,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash 223354930, now seen corresponding path program 1 times [2022-07-22 15:38:47,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:47,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599418387] [2022-07-22 15:38:47,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:47,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:47,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 15:38:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:47,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 15:38:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:47,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 15:38:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:47,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 15:38:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:38:47,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:47,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599418387] [2022-07-22 15:38:47,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599418387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:38:47,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:38:47,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:38:47,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542408864] [2022-07-22 15:38:47,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:38:47,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:38:47,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:47,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:38:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:38:47,812 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:38:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:47,839 INFO L93 Difference]: Finished difference Result 61 states and 100 transitions. [2022-07-22 15:38:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:38:47,841 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-07-22 15:38:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:47,847 INFO L225 Difference]: With dead ends: 61 [2022-07-22 15:38:47,848 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 15:38:47,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 15:38:47,856 INFO L413 NwaCegarLoop]: 41 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, 41 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 15:38:47,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:38:47,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 15:38:47,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-22 15:38:47,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 15:38:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-22 15:38:47,899 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 28 [2022-07-22 15:38:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:47,899 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-22 15:38:47,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:38:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-22 15:38:47,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 15:38:47,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:47,903 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:47,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:38:47,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:47,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:47,912 INFO L85 PathProgramCache]: Analyzing trace with hash 727709964, now seen corresponding path program 1 times [2022-07-22 15:38:47,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:47,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924050705] [2022-07-22 15:38:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:47,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:47,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:47,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566677322] [2022-07-22 15:38:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:47,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:47,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:47,951 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 15:38:47,995 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 15:38:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:48,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:38:48,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:38:48,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:38:48,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:48,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924050705] [2022-07-22 15:38:48,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:48,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566677322] [2022-07-22 15:38:48,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566677322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:48,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:38:48,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-22 15:38:48,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877094993] [2022-07-22 15:38:48,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:48,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 15:38:48,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:48,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 15:38:48,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:38:48,269 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:38:48,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:48,408 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-07-22 15:38:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:38:48,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-22 15:38:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:48,410 INFO L225 Difference]: With dead ends: 45 [2022-07-22 15:38:48,410 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 15:38:48,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:38:48,411 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:48,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 99 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:38:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 15:38:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-07-22 15:38:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 15:38:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-07-22 15:38:48,420 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 29 [2022-07-22 15:38:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:48,420 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-07-22 15:38:48,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:38:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-07-22 15:38:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 15:38:48,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:48,422 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:48,445 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 15:38:48,645 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 15:38:48,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1088429638, now seen corresponding path program 1 times [2022-07-22 15:38:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:48,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533639605] [2022-07-22 15:38:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:48,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:48,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:48,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755062849] [2022-07-22 15:38:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:48,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:48,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:48,658 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 15:38:48,667 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 15:38:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:48,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 15:38:48,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:38:48,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:38:48,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:48,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533639605] [2022-07-22 15:38:48,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:48,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755062849] [2022-07-22 15:38:48,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755062849] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:48,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:38:48,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 15:38:48,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606317734] [2022-07-22 15:38:48,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:38:48,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:38:48,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:48,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:38:48,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:38:48,827 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:38:48,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:48,868 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-07-22 15:38:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:38:48,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-07-22 15:38:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:48,870 INFO L225 Difference]: With dead ends: 36 [2022-07-22 15:38:48,870 INFO L226 Difference]: Without dead ends: 34 [2022-07-22 15:38:48,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:38:48,871 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:48,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:38:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-22 15:38:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-22 15:38:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 15:38:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-07-22 15:38:48,879 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2022-07-22 15:38:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:48,879 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-07-22 15:38:48,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 15:38:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-07-22 15:38:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 15:38:48,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:48,881 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 15:38:48,909 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 15:38:49,103 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 15:38:49,104 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:49,104 INFO L85 PathProgramCache]: Analyzing trace with hash 161014808, now seen corresponding path program 1 times [2022-07-22 15:38:49,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:49,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438789385] [2022-07-22 15:38:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:49,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:49,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:49,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772965681] [2022-07-22 15:38:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:49,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:49,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:49,120 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 15:38:49,128 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 15:38:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:38:49,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:38:49,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 15:38:49,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:49,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438789385] [2022-07-22 15:38:49,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:49,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772965681] [2022-07-22 15:38:49,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772965681] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:49,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:38:49,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 15:38:49,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270757504] [2022-07-22 15:38:49,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:38:49,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:38:49,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:38:49,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:38:49,416 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 15:38:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:49,477 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-07-22 15:38:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:38:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-07-22 15:38:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:49,479 INFO L225 Difference]: With dead ends: 47 [2022-07-22 15:38:49,479 INFO L226 Difference]: Without dead ends: 45 [2022-07-22 15:38:49,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:38:49,480 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:49,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 125 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:38:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-22 15:38:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-07-22 15:38:49,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 15:38:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-07-22 15:38:49,492 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 35 [2022-07-22 15:38:49,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:49,493 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-07-22 15:38:49,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 15:38:49,493 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-07-22 15:38:49,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 15:38:49,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:49,494 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 15:38:49,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 15:38:49,710 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 15:38:49,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:49,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2062939834, now seen corresponding path program 1 times [2022-07-22 15:38:49,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:49,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581174197] [2022-07-22 15:38:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:49,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:49,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:49,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855627823] [2022-07-22 15:38:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:49,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:49,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:49,724 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 15:38:49,740 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 15:38:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:49,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:38:49,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 15:38:49,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 15:38:50,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:50,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581174197] [2022-07-22 15:38:50,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:50,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855627823] [2022-07-22 15:38:50,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855627823] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:50,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:38:50,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 15:38:50,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468947934] [2022-07-22 15:38:50,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:38:50,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:38:50,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:50,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:38:50,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:38:50,060 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 15:38:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:50,118 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-07-22 15:38:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:38:50,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-07-22 15:38:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:50,124 INFO L225 Difference]: With dead ends: 51 [2022-07-22 15:38:50,124 INFO L226 Difference]: Without dead ends: 49 [2022-07-22 15:38:50,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:38:50,127 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:50,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:38:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-22 15:38:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-07-22 15:38:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 15:38:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-07-22 15:38:50,147 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 40 [2022-07-22 15:38:50,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:50,149 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-07-22 15:38:50,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 15:38:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-07-22 15:38:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 15:38:50,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:50,153 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:50,175 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 15:38:50,366 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 15:38:50,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:50,367 INFO L85 PathProgramCache]: Analyzing trace with hash -98301800, now seen corresponding path program 1 times [2022-07-22 15:38:50,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430399108] [2022-07-22 15:38:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:50,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:50,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:50,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014929174] [2022-07-22 15:38:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:50,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:50,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:50,380 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 15:38:50,414 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 15:38:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:50,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 15:38:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 15:38:50,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:50,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:50,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430399108] [2022-07-22 15:38:50,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:50,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014929174] [2022-07-22 15:38:50,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014929174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:50,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:38:50,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-22 15:38:50,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344449066] [2022-07-22 15:38:50,741 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:50,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 15:38:50,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 15:38:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:38:50,742 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 15:38:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:50,868 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-07-22 15:38:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 15:38:50,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-07-22 15:38:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:50,870 INFO L225 Difference]: With dead ends: 55 [2022-07-22 15:38:50,870 INFO L226 Difference]: Without dead ends: 53 [2022-07-22 15:38:50,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:38:50,871 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:50,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 95 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:38:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-22 15:38:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-07-22 15:38:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 15:38:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-07-22 15:38:50,880 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 45 [2022-07-22 15:38:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:50,880 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-07-22 15:38:50,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 15:38:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-07-22 15:38:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 15:38:50,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:50,882 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:50,908 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 15:38:51,098 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 15:38:51,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:51,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1721617041, now seen corresponding path program 1 times [2022-07-22 15:38:51,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:51,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475915564] [2022-07-22 15:38:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:51,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:51,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:51,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590253002] [2022-07-22 15:38:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:51,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:51,116 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 15:38:51,117 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 15:38:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:51,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 15:38:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 15:38:51,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 15:38:51,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:51,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475915564] [2022-07-22 15:38:51,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:51,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590253002] [2022-07-22 15:38:51,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590253002] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:51,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:38:51,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-22 15:38:51,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162530145] [2022-07-22 15:38:51,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:51,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 15:38:51,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:51,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 15:38:51,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:38:51,322 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 15:38:51,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:51,523 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-07-22 15:38:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 15:38:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2022-07-22 15:38:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:51,528 INFO L225 Difference]: With dead ends: 99 [2022-07-22 15:38:51,528 INFO L226 Difference]: Without dead ends: 91 [2022-07-22 15:38:51,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:38:51,530 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:51,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 250 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:38:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-22 15:38:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2022-07-22 15:38:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-22 15:38:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 113 transitions. [2022-07-22 15:38:51,567 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 113 transitions. Word has length 54 [2022-07-22 15:38:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:51,569 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 113 transitions. [2022-07-22 15:38:51,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 15:38:51,569 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 113 transitions. [2022-07-22 15:38:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 15:38:51,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:51,571 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:51,598 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 15:38:51,787 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 15:38:51,788 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:51,788 INFO L85 PathProgramCache]: Analyzing trace with hash -653850053, now seen corresponding path program 1 times [2022-07-22 15:38:51,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:51,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119887084] [2022-07-22 15:38:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:51,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:51,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:51,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952999114] [2022-07-22 15:38:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:51,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:51,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:51,799 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 15:38:51,800 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 15:38:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:51,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 15:38:51,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-22 15:38:51,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-22 15:38:52,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:52,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119887084] [2022-07-22 15:38:52,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:52,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952999114] [2022-07-22 15:38:52,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952999114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:52,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:38:52,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-07-22 15:38:52,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191406204] [2022-07-22 15:38:52,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:52,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 15:38:52,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:52,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 15:38:52,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-22 15:38:52,087 INFO L87 Difference]: Start difference. First operand 82 states and 113 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-22 15:38:52,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:52,472 INFO L93 Difference]: Finished difference Result 125 states and 178 transitions. [2022-07-22 15:38:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 15:38:52,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2022-07-22 15:38:52,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:52,475 INFO L225 Difference]: With dead ends: 125 [2022-07-22 15:38:52,475 INFO L226 Difference]: Without dead ends: 121 [2022-07-22 15:38:52,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-22 15:38:52,476 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:52,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 167 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:38:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-22 15:38:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2022-07-22 15:38:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-22 15:38:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2022-07-22 15:38:52,493 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 60 [2022-07-22 15:38:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:52,493 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2022-07-22 15:38:52,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-22 15:38:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2022-07-22 15:38:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 15:38:52,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:52,495 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:52,527 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 15:38:52,711 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 15:38:52,712 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1044201731, now seen corresponding path program 2 times [2022-07-22 15:38:52,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:52,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129557285] [2022-07-22 15:38:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:52,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:52,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:52,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45760679] [2022-07-22 15:38:52,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:38:52,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:52,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:52,728 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 15:38:52,728 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 15:38:52,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:38:52,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:38:52,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 15:38:52,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 15:38:53,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 15:38:53,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:53,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129557285] [2022-07-22 15:38:53,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:53,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45760679] [2022-07-22 15:38:53,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45760679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:53,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:38:53,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-07-22 15:38:53,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960795870] [2022-07-22 15:38:53,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:53,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 15:38:53,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:53,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 15:38:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:38:53,176 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-07-22 15:38:56,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:38:57,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:57,843 INFO L93 Difference]: Finished difference Result 233 states and 345 transitions. [2022-07-22 15:38:57,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 15:38:57,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 65 [2022-07-22 15:38:57,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:57,846 INFO L225 Difference]: With dead ends: 233 [2022-07-22 15:38:57,846 INFO L226 Difference]: Without dead ends: 231 [2022-07-22 15:38:57,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-07-22 15:38:57,848 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 74 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 112 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:57,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 229 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 447 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-07-22 15:38:57,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-22 15:38:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 222. [2022-07-22 15:38:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 116 states have (on average 1.25) internal successors, (145), 119 states have internal predecessors, (145), 95 states have call successors, (95), 10 states have call predecessors, (95), 10 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-07-22 15:38:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 334 transitions. [2022-07-22 15:38:57,884 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 334 transitions. Word has length 65 [2022-07-22 15:38:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:57,885 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 334 transitions. [2022-07-22 15:38:57,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-07-22 15:38:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 334 transitions. [2022-07-22 15:38:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-22 15:38:57,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:57,887 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:57,911 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 15:38:58,107 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 15:38:58,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash 635379451, now seen corresponding path program 3 times [2022-07-22 15:38:58,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:58,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230044404] [2022-07-22 15:38:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:58,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:58,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:58,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864377200] [2022-07-22 15:38:58,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:38:58,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:58,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:58,120 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 15:38:58,125 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 15:38:58,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 15:38:58,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:38:58,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 15:38:58,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-22 15:38:58,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:58,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:58,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230044404] [2022-07-22 15:38:58,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:58,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864377200] [2022-07-22 15:38:58,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864377200] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:38:58,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:38:58,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-22 15:38:58,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114063996] [2022-07-22 15:38:58,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:58,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 15:38:58,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:58,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 15:38:58,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-22 15:38:58,608 INFO L87 Difference]: Start difference. First operand 222 states and 334 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-22 15:38:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:38:58,968 INFO L93 Difference]: Finished difference Result 238 states and 347 transitions. [2022-07-22 15:38:58,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 15:38:58,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2022-07-22 15:38:58,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:38:58,972 INFO L225 Difference]: With dead ends: 238 [2022-07-22 15:38:58,973 INFO L226 Difference]: Without dead ends: 236 [2022-07-22 15:38:58,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-22 15:38:58,975 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:38:58,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 135 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:38:58,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-22 15:38:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2022-07-22 15:38:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 125 states have (on average 1.232) internal successors, (154), 128 states have internal predecessors, (154), 95 states have call successors, (95), 13 states have call predecessors, (95), 13 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-07-22 15:38:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 343 transitions. [2022-07-22 15:38:59,030 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 343 transitions. Word has length 70 [2022-07-22 15:38:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:38:59,032 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 343 transitions. [2022-07-22 15:38:59,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-22 15:38:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 343 transitions. [2022-07-22 15:38:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 15:38:59,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:38:59,034 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:38:59,060 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 15:38:59,247 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 15:38:59,247 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:38:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:38:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash -375209714, now seen corresponding path program 1 times [2022-07-22 15:38:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:38:59,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846513759] [2022-07-22 15:38:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:59,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:38:59,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:38:59,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041654853] [2022-07-22 15:38:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:38:59,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:38:59,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:38:59,261 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 15:38:59,264 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 15:38:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:38:59,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 15:38:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:38:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-22 15:38:59,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:38:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-22 15:38:59,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:38:59,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846513759] [2022-07-22 15:38:59,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:38:59,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041654853] [2022-07-22 15:38:59,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041654853] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:38:59,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:38:59,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-07-22 15:38:59,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277663787] [2022-07-22 15:38:59,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:38:59,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 15:38:59,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:38:59,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 15:38:59,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:38:59,916 INFO L87 Difference]: Start difference. First operand 234 states and 343 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-07-22 15:39:02,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:39:02,031 INFO L93 Difference]: Finished difference Result 373 states and 564 transitions. [2022-07-22 15:39:02,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 15:39:02,032 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 76 [2022-07-22 15:39:02,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:39:02,035 INFO L225 Difference]: With dead ends: 373 [2022-07-22 15:39:02,035 INFO L226 Difference]: Without dead ends: 365 [2022-07-22 15:39:02,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-07-22 15:39:02,036 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 50 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:39:02,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 272 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 15:39:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-22 15:39:02,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 361. [2022-07-22 15:39:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 187 states have (on average 1.2459893048128343) internal successors, (233), 188 states have internal predecessors, (233), 157 states have call successors, (157), 16 states have call predecessors, (157), 16 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2022-07-22 15:39:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 546 transitions. [2022-07-22 15:39:02,116 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 546 transitions. Word has length 76 [2022-07-22 15:39:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:39:02,117 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 546 transitions. [2022-07-22 15:39:02,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-07-22 15:39:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 546 transitions. [2022-07-22 15:39:02,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 15:39:02,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:02,119 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:02,143 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 15:39:02,331 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 15:39:02,331 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1261079706, now seen corresponding path program 1 times [2022-07-22 15:39:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897003129] [2022-07-22 15:39:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:02,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:02,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:39:02,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382817612] [2022-07-22 15:39:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:02,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:02,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:02,343 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 15:39:02,344 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 15:39:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:02,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-22 15:39:02,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:39:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-22 15:39:02,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:39:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 79 proven. 27 refuted. 6 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-22 15:39:19,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:19,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897003129] [2022-07-22 15:39:19,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:39:19,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382817612] [2022-07-22 15:39:19,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382817612] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:39:19,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:39:19,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2022-07-22 15:39:19,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740041498] [2022-07-22 15:39:19,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:39:19,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 15:39:19,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:19,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 15:39:19,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=260, Unknown=5, NotChecked=0, Total=342 [2022-07-22 15:39:19,915 INFO L87 Difference]: Start difference. First operand 361 states and 546 transitions. Second operand has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 11 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2022-07-22 15:39:43,727 WARN L233 SmtUtils]: Spent 23.17s on a formula simplification. DAG size of input: 89 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:40:18,950 WARN L233 SmtUtils]: Spent 34.58s on a formula simplification. DAG size of input: 89 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:40:21,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:40:23,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:40:25,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:40:27,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:40:29,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:40:31,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:40:34,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:40:37,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:40:56,438 WARN L233 SmtUtils]: Spent 18.21s on a formula simplification. DAG size of input: 90 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:41:35,330 WARN L233 SmtUtils]: Spent 38.55s on a formula simplification. DAG size of input: 90 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:41:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:41:35,839 INFO L93 Difference]: Finished difference Result 461 states and 701 transitions. [2022-07-22 15:41:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 15:41:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 11 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) Word has length 92 [2022-07-22 15:41:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:41:35,843 INFO L225 Difference]: With dead ends: 461 [2022-07-22 15:41:35,843 INFO L226 Difference]: Without dead ends: 459 [2022-07-22 15:41:35,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 127.7s TimeCoverageRelationStatistics Valid=186, Invalid=565, Unknown=5, NotChecked=0, Total=756 [2022-07-22 15:41:35,844 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 76 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 151 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-07-22 15:41:35,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 145 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 474 Invalid, 7 Unknown, 0 Unchecked, 19.7s Time] [2022-07-22 15:41:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-07-22 15:41:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 456. [2022-07-22 15:41:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 237 states have (on average 1.2447257383966244) internal successors, (295), 243 states have internal predecessors, (295), 201 states have call successors, (201), 17 states have call predecessors, (201), 17 states have return successors, (200), 195 states have call predecessors, (200), 200 states have call successors, (200) [2022-07-22 15:41:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 696 transitions. [2022-07-22 15:41:35,988 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 696 transitions. Word has length 92 [2022-07-22 15:41:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:41:35,989 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 696 transitions. [2022-07-22 15:41:35,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 11 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2022-07-22 15:41:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 696 transitions. [2022-07-22 15:41:35,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 15:41:35,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:41:35,991 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:41:36,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 15:41:36,207 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 15:41:36,208 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:41:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:41:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash -704441427, now seen corresponding path program 2 times [2022-07-22 15:41:36,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:41:36,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68827876] [2022-07-22 15:41:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:41:36,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:41:36,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:41:36,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418700608] [2022-07-22 15:41:36,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:41:36,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:41:36,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:41:36,241 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 15:41:36,244 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 15:41:36,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:41:36,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:41:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:41:36,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:41:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-07-22 15:41:36,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:41:36,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:41:36,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68827876] [2022-07-22 15:41:36,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:41:36,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418700608] [2022-07-22 15:41:36,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418700608] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:41:36,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:41:36,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:41:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692817156] [2022-07-22 15:41:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:41:36,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:41:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:41:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:41:36,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:41:36,346 INFO L87 Difference]: Start difference. First operand 456 states and 696 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-22 15:41:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:41:36,492 INFO L93 Difference]: Finished difference Result 579 states and 875 transitions. [2022-07-22 15:41:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:41:36,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-07-22 15:41:36,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:41:36,495 INFO L225 Difference]: With dead ends: 579 [2022-07-22 15:41:36,495 INFO L226 Difference]: Without dead ends: 294 [2022-07-22 15:41:36,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:41:36,499 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:41:36,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 125 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:41:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-22 15:41:36,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-07-22 15:41:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 159 states have (on average 1.169811320754717) internal successors, (186), 162 states have internal predecessors, (186), 117 states have call successors, (117), 17 states have call predecessors, (117), 17 states have return successors, (116), 114 states have call predecessors, (116), 116 states have call successors, (116) [2022-07-22 15:41:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 419 transitions. [2022-07-22 15:41:36,593 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 419 transitions. Word has length 101 [2022-07-22 15:41:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:41:36,594 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 419 transitions. [2022-07-22 15:41:36,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-22 15:41:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 419 transitions. [2022-07-22 15:41:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-22 15:41:36,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:41:36,598 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:41:36,624 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 15:41:36,811 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 15:41:36,811 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:41:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:41:36,812 INFO L85 PathProgramCache]: Analyzing trace with hash 898620650, now seen corresponding path program 3 times [2022-07-22 15:41:36,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:41:36,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352438685] [2022-07-22 15:41:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:41:36,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:41:36,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:41:36,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949946296] [2022-07-22 15:41:36,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:41:36,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:41:36,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:41:36,825 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 15:41:36,843 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 15:41:36,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 15:41:36,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:41:36,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 15:41:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:41:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 67 proven. 43 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-07-22 15:41:37,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:42:06,492 WARN L855 $PredicateComparison]: unable to prove that (and (or (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_116| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_90| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_119| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| Int)) (or (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_90|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_84|)) (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_119| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|) (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_116| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|))) (= (mod (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110|) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2022-07-22 15:42:28,552 WARN L855 $PredicateComparison]: unable to prove that (or (and (or (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_116| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_90| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_119| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| Int)) (or (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_90|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_84|)) (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_119| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|) (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_116| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|))) (= (mod (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110|) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))) (not (= |c___VERIFIER_assert_#in~cond| 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-07-22 15:42:42,584 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_116| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_90| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_119| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| Int)) (or (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_90|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_84|)) (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_119| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|) (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_116| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|))) (= (mod (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110|) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-07-22 15:42:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 78 proven. 33 refuted. 12 times theorem prover too weak. 454 trivial. 2 not checked. [2022-07-22 15:42:44,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:42:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352438685] [2022-07-22 15:42:44,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:42:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949946296] [2022-07-22 15:42:44,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949946296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:42:44,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:42:44,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2022-07-22 15:42:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284616003] [2022-07-22 15:42:44,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:42:44,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 15:42:44,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:42:44,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 15:42:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=389, Unknown=3, NotChecked=126, Total=600 [2022-07-22 15:42:44,952 INFO L87 Difference]: Start difference. First operand 294 states and 419 transitions. Second operand has 25 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-07-22 15:42:47,863 WARN L855 $PredicateComparison]: unable to prove that (and (or (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_116| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_90| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_119| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| Int)) (or (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_90|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_84|)) (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_119| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|) (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_116| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|))) (= (mod (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110|) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))) (<= 1 |c___VERIFIER_assert_#in~cond|)) is different from true [2022-07-22 15:43:18,599 WARN L233 SmtUtils]: Spent 30.22s on a formula simplification. DAG size of input: 36 DAG size of output: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:43:23,340 WARN L855 $PredicateComparison]: unable to prove that (and (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (or (and (or (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_116| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_90| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_119| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| Int)) (or (<= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_90|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_84|)) (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_119| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_139| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|) (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_116| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_131| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|))) (= (mod (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_56|) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_110|) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))) (not (= |c___VERIFIER_assert_#in~cond| 0))) (= c___VERIFIER_assert_~cond 0))) is different from true