./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-scaling/egcd3-ll_valuebound50.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 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 03:28:46,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 03:28:46,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 03:28:46,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 03:28:46,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 03:28:46,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 03:28:46,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 03:28:46,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 03:28:46,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 03:28:46,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 03:28:46,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 03:28:46,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 03:28:46,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 03:28:46,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 03:28:46,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 03:28:46,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 03:28:46,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 03:28:46,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 03:28:46,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 03:28:46,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 03:28:46,763 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 03:28:46,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 03:28:46,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 03:28:46,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 03:28:46,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 03:28:46,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 03:28:46,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 03:28:46,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 03:28:46,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 03:28:46,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 03:28:46,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 03:28:46,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 03:28:46,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 03:28:46,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 03:28:46,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 03:28:46,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 03:28:46,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 03:28:46,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 03:28:46,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 03:28:46,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 03:28:46,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 03:28:46,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 03:28:46,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 03:28:46,821 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 03:28:46,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 03:28:46,822 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 03:28:46,822 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 03:28:46,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 03:28:46,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 03:28:46,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 03:28:46,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 03:28:46,824 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 03:28:46,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 03:28:46,825 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 03:28:46,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 03:28:46,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 03:28:46,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 03:28:46,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 03:28:46,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 03:28:46,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 03:28:46,826 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 03:28:46,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 03:28:46,827 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 03:28:46,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 03:28:46,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 03:28:46,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 03:28:46,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 03:28:46,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:28:46,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 03:28:46,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 03:28:46,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 03:28:46,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 03:28:46,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 03:28:46,829 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 03:28:46,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 03:28:46,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 03:28:46,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb [2022-07-21 03:28:47,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 03:28:47,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 03:28:47,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 03:28:47,144 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 03:28:47,144 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 03:28:47,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-07-21 03:28:47,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115b10468/a30739a7c608459097c032a2cbfce847/FLAGe520e973a [2022-07-21 03:28:47,617 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 03:28:47,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-07-21 03:28:47,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115b10468/a30739a7c608459097c032a2cbfce847/FLAGe520e973a [2022-07-21 03:28:47,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115b10468/a30739a7c608459097c032a2cbfce847 [2022-07-21 03:28:47,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 03:28:47,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 03:28:47,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 03:28:47,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 03:28:47,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 03:28:47,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:47,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abeea67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47, skipping insertion in model container [2022-07-21 03:28:47,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:47,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 03:28:47,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 03:28:47,824 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-scaling/egcd3-ll_valuebound50.c[490,503] [2022-07-21 03:28:47,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:28:47,868 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 03:28:47,894 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-scaling/egcd3-ll_valuebound50.c[490,503] [2022-07-21 03:28:47,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:28:47,927 INFO L208 MainTranslator]: Completed translation [2022-07-21 03:28:47,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47 WrapperNode [2022-07-21 03:28:47,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 03:28:47,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 03:28:47,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 03:28:47,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 03:28:47,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:47,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:47,961 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-07-21 03:28:47,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 03:28:47,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 03:28:47,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 03:28:47,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 03:28:47,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:47,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:47,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:47,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:47,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:47,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:47,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:48,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 03:28:48,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 03:28:48,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 03:28:48,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 03:28:48,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47" (1/1) ... [2022-07-21 03:28:48,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:28:48,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:48,033 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) [2022-07-21 03:28:48,047 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 [2022-07-21 03:28:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 03:28:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 03:28:48,075 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 03:28:48,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 03:28:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 03:28:48,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 03:28:48,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 03:28:48,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 03:28:48,130 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 03:28:48,132 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 03:28:48,287 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 03:28:48,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 03:28:48,292 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 03:28:48,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:28:48 BoogieIcfgContainer [2022-07-21 03:28:48,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 03:28:48,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 03:28:48,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 03:28:48,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 03:28:48,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:28:47" (1/3) ... [2022-07-21 03:28:48,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f7355a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:28:48, skipping insertion in model container [2022-07-21 03:28:48,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:28:47" (2/3) ... [2022-07-21 03:28:48,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f7355a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:28:48, skipping insertion in model container [2022-07-21 03:28:48,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:28:48" (3/3) ... [2022-07-21 03:28:48,316 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2022-07-21 03:28:48,332 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 03:28:48,347 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 03:28:48,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 03:28:48,389 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@e1b945c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6950c4a1 [2022-07-21 03:28:48,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 03:28:48,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 03:28:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 03:28:48,399 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:48,399 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] [2022-07-21 03:28:48,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:48,413 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2022-07-21 03:28:48,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:48,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813328028] [2022-07-21 03:28:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:48,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:48,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 03:28:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:48,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 03:28:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:48,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 03:28:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:48,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 03:28:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:28:48,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:48,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813328028] [2022-07-21 03:28:48,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813328028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:28:48,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:28:48,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 03:28:48,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994899524] [2022-07-21 03:28:48,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:28:48,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 03:28:48,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 03:28:48,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:28:48,631 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-07-21 03:28:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:48,650 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2022-07-21 03:28:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 03:28:48,651 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 29 [2022-07-21 03:28:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:48,658 INFO L225 Difference]: With dead ends: 67 [2022-07-21 03:28:48,658 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 03:28:48,665 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 [2022-07-21 03:28:48,667 INFO L413 NwaCegarLoop]: 44 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, 44 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 [2022-07-21 03:28:48,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:28:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 03:28:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 03:28:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 03:28:48,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-07-21 03:28:48,700 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2022-07-21 03:28:48,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:48,700 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-07-21 03:28:48,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-07-21 03:28:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-07-21 03:28:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 03:28:48,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:48,702 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] [2022-07-21 03:28:48,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 03:28:48,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:48,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2022-07-21 03:28:48,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:48,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148745597] [2022-07-21 03:28:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:48,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:48,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:48,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099451911] [2022-07-21 03:28:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:48,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:48,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:48,731 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) [2022-07-21 03:28:48,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 03:28:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:28:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 03:28:48,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:28:48,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:48,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148745597] [2022-07-21 03:28:48,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:48,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099451911] [2022-07-21 03:28:48,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099451911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:28:48,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:28:48,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 03:28:48,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870507365] [2022-07-21 03:28:48,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:28:48,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 03:28:48,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 03:28:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:28:48,877 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:28:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:49,016 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-07-21 03:28:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:28:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-07-21 03:28:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:49,018 INFO L225 Difference]: With dead ends: 50 [2022-07-21 03:28:49,019 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 03:28:49,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 03:28:49,020 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:49,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 113 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:28:49,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 03:28:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-07-21 03:28:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 03:28:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-07-21 03:28:49,031 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2022-07-21 03:28:49,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:49,031 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-07-21 03:28:49,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:28:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-07-21 03:28:49,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 03:28:49,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:49,033 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, 1, 1, 1] [2022-07-21 03:28:49,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:49,257 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 [2022-07-21 03:28:49,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:49,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:49,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2022-07-21 03:28:49,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:49,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793436365] [2022-07-21 03:28:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:49,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:49,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:49,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034994261] [2022-07-21 03:28:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:49,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:49,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:49,285 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) [2022-07-21 03:28:49,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 03:28:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:49,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 03:28:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:28:49,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:28:49,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:49,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793436365] [2022-07-21 03:28:49,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:49,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034994261] [2022-07-21 03:28:49,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034994261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:28:49,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:28:49,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:28:49,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885979127] [2022-07-21 03:28:49,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:28:49,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:28:49,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:49,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:28:49,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:28:49,409 INFO L87 Difference]: Start difference. First operand 33 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, (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) [2022-07-21 03:28:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:49,474 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-07-21 03:28:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:28:49,475 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, (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 33 [2022-07-21 03:28:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:49,476 INFO L225 Difference]: With dead ends: 49 [2022-07-21 03:28:49,476 INFO L226 Difference]: Without dead ends: 47 [2022-07-21 03:28:49,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:28:49,478 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:49,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 137 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:28:49,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-21 03:28:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-21 03:28:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 03:28:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-07-21 03:28:49,497 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2022-07-21 03:28:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:49,498 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-07-21 03:28:49,498 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, (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) [2022-07-21 03:28:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-07-21 03:28:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 03:28:49,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:49,501 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] [2022-07-21 03:28:49,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:49,716 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 [2022-07-21 03:28:49,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:49,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2022-07-21 03:28:49,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:49,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029077399] [2022-07-21 03:28:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:49,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:49,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:49,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711582415] [2022-07-21 03:28:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:49,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:49,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:49,750 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) [2022-07-21 03:28:49,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 03:28:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 03:28:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 03:28:49,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:28:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 03:28:49,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029077399] [2022-07-21 03:28:49,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:49,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711582415] [2022-07-21 03:28:49,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711582415] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:28:49,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:28:49,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-21 03:28:49,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249296363] [2022-07-21 03:28:49,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:28:49,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 03:28:49,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 03:28:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:28:49,990 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:28:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:50,170 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2022-07-21 03:28:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 03:28:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-21 03:28:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:50,177 INFO L225 Difference]: With dead ends: 99 [2022-07-21 03:28:50,177 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 03:28:50,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:28:50,181 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:50,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 176 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:28:50,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 03:28:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2022-07-21 03:28:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-21 03:28:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-07-21 03:28:50,196 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2022-07-21 03:28:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:50,196 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-07-21 03:28:50,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:28:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-07-21 03:28:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 03:28:50,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:50,198 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, 1, 1, 1] [2022-07-21 03:28:50,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:50,407 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 [2022-07-21 03:28:50,408 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:50,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:50,408 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2022-07-21 03:28:50,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:50,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980547069] [2022-07-21 03:28:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:50,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:50,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:50,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302915316] [2022-07-21 03:28:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:50,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:50,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:50,422 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) [2022-07-21 03:28:50,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 03:28:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:50,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 03:28:50,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:28:50,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:28:50,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980547069] [2022-07-21 03:28:50,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302915316] [2022-07-21 03:28:50,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302915316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:28:50,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:28:50,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:28:50,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460277727] [2022-07-21 03:28:50,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:28:50,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:28:50,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:50,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:28:50,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:28:50,560 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-21 03:28:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:50,616 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2022-07-21 03:28:50,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:28:50,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 38 [2022-07-21 03:28:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:50,620 INFO L225 Difference]: With dead ends: 75 [2022-07-21 03:28:50,620 INFO L226 Difference]: Without dead ends: 73 [2022-07-21 03:28:50,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:28:50,622 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:50,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 131 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:28:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-21 03:28:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-07-21 03:28:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-21 03:28:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-07-21 03:28:50,643 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2022-07-21 03:28:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:50,648 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-07-21 03:28:50,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-21 03:28:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-07-21 03:28:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 03:28:50,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:50,652 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:28:50,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:50,855 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 [2022-07-21 03:28:50,856 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:50,856 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2022-07-21 03:28:50,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:50,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496443499] [2022-07-21 03:28:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:50,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:50,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:50,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323844347] [2022-07-21 03:28:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:50,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:50,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:50,872 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) [2022-07-21 03:28:50,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 03:28:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 03:28:50,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:28:50,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:28:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:28:51,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:51,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496443499] [2022-07-21 03:28:51,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:51,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323844347] [2022-07-21 03:28:51,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323844347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:28:51,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:28:51,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-07-21 03:28:51,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456023213] [2022-07-21 03:28:51,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:28:51,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 03:28:51,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:51,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 03:28:51,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 03:28:51,111 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:28:51,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:51,176 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2022-07-21 03:28:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:28:51,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2022-07-21 03:28:51,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:51,178 INFO L225 Difference]: With dead ends: 95 [2022-07-21 03:28:51,178 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 03:28:51,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:28:51,179 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:51,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 229 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-07-21 03:28:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 03:28:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-07-21 03:28:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 63 states have internal predecessors, (77), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 03:28:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2022-07-21 03:28:51,192 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 38 [2022-07-21 03:28:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:51,192 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2022-07-21 03:28:51,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:28:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2022-07-21 03:28:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 03:28:51,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:51,194 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, 1, 1, 1] [2022-07-21 03:28:51,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:51,407 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 [2022-07-21 03:28:51,407 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:51,408 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2022-07-21 03:28:51,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:51,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983009171] [2022-07-21 03:28:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:51,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:51,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:51,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673220123] [2022-07-21 03:28:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:51,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:51,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:51,434 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) [2022-07-21 03:28:51,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 03:28:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:51,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:28:51,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 03:28:51,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:28:51,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:51,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983009171] [2022-07-21 03:28:51,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:51,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673220123] [2022-07-21 03:28:51,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673220123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:28:51,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:28:51,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:28:51,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183844829] [2022-07-21 03:28:51,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:28:51,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:28:51,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:28:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:28:51,542 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-21 03:28:51,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:51,598 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2022-07-21 03:28:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:28:51,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 43 [2022-07-21 03:28:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:51,602 INFO L225 Difference]: With dead ends: 126 [2022-07-21 03:28:51,602 INFO L226 Difference]: Without dead ends: 124 [2022-07-21 03:28:51,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:28:51,604 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 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 [2022-07-21 03:28:51,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:28:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-21 03:28:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-07-21 03:28:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 76 states have internal predecessors, (95), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-21 03:28:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 168 transitions. [2022-07-21 03:28:51,637 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 168 transitions. Word has length 43 [2022-07-21 03:28:51,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:51,638 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 168 transitions. [2022-07-21 03:28:51,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-21 03:28:51,639 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 168 transitions. [2022-07-21 03:28:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 03:28:51,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:51,643 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:28:51,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:51,865 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 [2022-07-21 03:28:51,866 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:51,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2022-07-21 03:28:51,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:51,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046889126] [2022-07-21 03:28:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:51,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:51,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:51,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507417381] [2022-07-21 03:28:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:51,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:51,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:51,887 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) [2022-07-21 03:28:51,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 03:28:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:51,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 03:28:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:28:52,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:28:52,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:52,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046889126] [2022-07-21 03:28:52,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:52,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507417381] [2022-07-21 03:28:52,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507417381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 03:28:52,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:28:52,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-21 03:28:52,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447171402] [2022-07-21 03:28:52,099 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 03:28:52,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 03:28:52,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:52,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 03:28:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 03:28:52,100 INFO L87 Difference]: Start difference. First operand 119 states and 168 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-07-21 03:28:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:52,264 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2022-07-21 03:28:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 03:28:52,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 43 [2022-07-21 03:28:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:52,267 INFO L225 Difference]: With dead ends: 133 [2022-07-21 03:28:52,267 INFO L226 Difference]: Without dead ends: 131 [2022-07-21 03:28:52,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:28:52,268 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:52,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 204 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:28:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-21 03:28:52,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2022-07-21 03:28:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-21 03:28:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2022-07-21 03:28:52,289 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 43 [2022-07-21 03:28:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:52,289 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2022-07-21 03:28:52,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-07-21 03:28:52,290 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2022-07-21 03:28:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 03:28:52,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:52,293 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:28:52,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:52,507 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 [2022-07-21 03:28:52,508 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2022-07-21 03:28:52,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:52,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219178485] [2022-07-21 03:28:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:52,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:52,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:52,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813947545] [2022-07-21 03:28:52,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:28:52,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:52,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:52,520 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) [2022-07-21 03:28:52,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 03:28:52,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:28:52,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:28:52,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 03:28:52,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:28:52,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:28:52,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:52,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219178485] [2022-07-21 03:28:52,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:52,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813947545] [2022-07-21 03:28:52,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813947545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:28:52,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:28:52,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:28:52,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344454926] [2022-07-21 03:28:52,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:28:52,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:28:52,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:52,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:28:52,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:28:52,580 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-07-21 03:28:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:52,668 INFO L93 Difference]: Finished difference Result 166 states and 226 transitions. [2022-07-21 03:28:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:28:52,668 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), 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 43 [2022-07-21 03:28:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:52,670 INFO L225 Difference]: With dead ends: 166 [2022-07-21 03:28:52,670 INFO L226 Difference]: Without dead ends: 110 [2022-07-21 03:28:52,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 03:28:52,675 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:52,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 139 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:28:52,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-21 03:28:52,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-07-21 03:28:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-21 03:28:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2022-07-21 03:28:52,691 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 43 [2022-07-21 03:28:52,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:52,691 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2022-07-21 03:28:52,691 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), 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) [2022-07-21 03:28:52,691 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2022-07-21 03:28:52,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 03:28:52,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:52,693 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, 1, 1, 1] [2022-07-21 03:28:52,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:52,907 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 [2022-07-21 03:28:52,908 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:52,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:52,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2022-07-21 03:28:52,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:52,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8752280] [2022-07-21 03:28:52,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:52,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:52,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:52,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037286960] [2022-07-21 03:28:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:52,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:52,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:52,919 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) [2022-07-21 03:28:52,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 03:28:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:52,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:28:52,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 03:28:53,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:28:53,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:53,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8752280] [2022-07-21 03:28:53,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:53,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037286960] [2022-07-21 03:28:53,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037286960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:28:53,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:28:53,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:28:53,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399406266] [2022-07-21 03:28:53,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:28:53,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:28:53,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:53,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:28:53,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:28:53,016 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 03:28:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:53,070 INFO L93 Difference]: Finished difference Result 154 states and 217 transitions. [2022-07-21 03:28:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:28:53,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2022-07-21 03:28:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:53,071 INFO L225 Difference]: With dead ends: 154 [2022-07-21 03:28:53,072 INFO L226 Difference]: Without dead ends: 152 [2022-07-21 03:28:53,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:28:53,072 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:53,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:28:53,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-21 03:28:53,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2022-07-21 03:28:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 80 states have internal predecessors, (85), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2022-07-21 03:28:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2022-07-21 03:28:53,089 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 48 [2022-07-21 03:28:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:53,089 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2022-07-21 03:28:53,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 03:28:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2022-07-21 03:28:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 03:28:53,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:53,091 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:28:53,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:53,311 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 [2022-07-21 03:28:53,311 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:53,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:53,312 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2022-07-21 03:28:53,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:53,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457336186] [2022-07-21 03:28:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:53,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:53,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:53,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145896455] [2022-07-21 03:28:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:53,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:53,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:53,325 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) [2022-07-21 03:28:53,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 03:28:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:53,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 03:28:53,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 03:28:53,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:28:56,484 WARN L855 $PredicateComparison]: unable to prove that (or (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~v~0#1|)) 0)) (let ((.cse11 (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (let ((.cse8 (= |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse4 (+ (* (- 1) .cse11 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (* |c_ULTIMATE.start_main_~s~0#1| .cse11) (- 1))))) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1| (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)))) (and (or (not (= .cse0 0)) (let ((.cse3 (= 0 |c_ULTIMATE.start_main_~q~0#1|)) (.cse1 (+ |c_ULTIMATE.start_main_~b~0#1| (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)))) (and (or (not (= .cse1 0)) (forall ((|ULTIMATE.start_main_~x~0#1| Int)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (let ((.cse2 (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (+ (* (+ (* (- 1) .cse2 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~x~0#1|) |c_ULTIMATE.start_main_~b~0#1| (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (* |c_ULTIMATE.start_main_~s~0#1| .cse2) (- 1)))))))) (not .cse3)) (or .cse3 (not (= (mod .cse1 |c_ULTIMATE.start_main_~q~0#1|) 0)) (let ((.cse5 (div .cse1 |c_ULTIMATE.start_main_~q~0#1|))) (= (+ (* .cse4 .cse5) |c_ULTIMATE.start_main_~b~0#1| .cse6) (+ .cse7 (* .cse5 |c_ULTIMATE.start_main_~q~0#1|))))))) (not .cse8)) (let ((.cse10 (div .cse0 |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse9 (+ .cse7 (* .cse10 |c_ULTIMATE.start_main_~q~0#1|)))) (or (not (= .cse9 |c_ULTIMATE.start_main_~b~0#1|)) .cse8 (not (= (mod .cse0 |c_ULTIMATE.start_main_~p~0#1|) 0)) (= .cse9 (+ (* .cse4 .cse10) |c_ULTIMATE.start_main_~b~0#1| .cse6))))))))) is different from true [2022-07-21 03:28:56,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457336186] [2022-07-21 03:28:56,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145896455] [2022-07-21 03:28:56,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145896455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 03:28:56,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:28:56,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-21 03:28:56,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123355752] [2022-07-21 03:28:56,487 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 03:28:56,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 03:28:56,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:56,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 03:28:56,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=290, Unknown=1, NotChecked=34, Total=380 [2022-07-21 03:28:56,488 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 03:28:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:57,013 INFO L93 Difference]: Finished difference Result 196 states and 279 transitions. [2022-07-21 03:28:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 03:28:57,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2022-07-21 03:28:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:57,015 INFO L225 Difference]: With dead ends: 196 [2022-07-21 03:28:57,015 INFO L226 Difference]: Without dead ends: 193 [2022-07-21 03:28:57,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=84, Invalid=425, Unknown=1, NotChecked=42, Total=552 [2022-07-21 03:28:57,016 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 46 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:57,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 224 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 03:28:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-21 03:28:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 178. [2022-07-21 03:28:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 97 states have (on average 1.175257731958763) internal successors, (114), 105 states have internal predecessors, (114), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-21 03:28:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 251 transitions. [2022-07-21 03:28:57,052 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 251 transitions. Word has length 60 [2022-07-21 03:28:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:57,053 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 251 transitions. [2022-07-21 03:28:57,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 03:28:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 251 transitions. [2022-07-21 03:28:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 03:28:57,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:57,054 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:28:57,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:57,267 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 [2022-07-21 03:28:57,267 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:57,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1649355429, now seen corresponding path program 2 times [2022-07-21 03:28:57,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:57,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198277119] [2022-07-21 03:28:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:57,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:57,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:57,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784777020] [2022-07-21 03:28:57,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:28:57,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:57,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:57,287 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) [2022-07-21 03:28:57,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 03:28:57,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:28:57,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:28:57,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 03:28:57,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 03:28:57,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:28:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 03:28:57,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:57,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198277119] [2022-07-21 03:28:57,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:57,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784777020] [2022-07-21 03:28:57,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784777020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:28:57,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:28:57,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-21 03:28:57,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123971533] [2022-07-21 03:28:57,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:28:57,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 03:28:57,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 03:28:57,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 03:28:57,429 INFO L87 Difference]: Start difference. First operand 178 states and 251 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 03:28:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:57,778 INFO L93 Difference]: Finished difference Result 273 states and 400 transitions. [2022-07-21 03:28:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 03:28:57,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-07-21 03:28:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:57,781 INFO L225 Difference]: With dead ends: 273 [2022-07-21 03:28:57,781 INFO L226 Difference]: Without dead ends: 266 [2022-07-21 03:28:57,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-21 03:28:57,782 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 48 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:57,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 288 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 03:28:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-21 03:28:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 193. [2022-07-21 03:28:57,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 117 states have internal predecessors, (135), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 64 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-21 03:28:57,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 272 transitions. [2022-07-21 03:28:57,807 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 272 transitions. Word has length 65 [2022-07-21 03:28:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:57,807 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 272 transitions. [2022-07-21 03:28:57,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 03:28:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 272 transitions. [2022-07-21 03:28:57,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 03:28:57,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:57,808 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, 1, 1, 1] [2022-07-21 03:28:57,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:58,019 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 [2022-07-21 03:28:58,019 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:58,020 INFO L85 PathProgramCache]: Analyzing trace with hash -492391883, now seen corresponding path program 1 times [2022-07-21 03:28:58,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:58,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072351217] [2022-07-21 03:28:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:58,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:58,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:58,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475185484] [2022-07-21 03:28:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:58,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:58,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:58,035 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) [2022-07-21 03:28:58,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 03:28:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:58,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 03:28:58,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-21 03:28:58,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:28:58,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:58,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072351217] [2022-07-21 03:28:58,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:58,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475185484] [2022-07-21 03:28:58,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475185484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:28:58,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:28:58,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:28:58,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347668475] [2022-07-21 03:28:58,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:28:58,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:28:58,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:58,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:28:58,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:28:58,114 INFO L87 Difference]: Start difference. First operand 193 states and 272 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 03:28:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:58,174 INFO L93 Difference]: Finished difference Result 324 states and 455 transitions. [2022-07-21 03:28:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:28:58,174 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2022-07-21 03:28:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:58,176 INFO L225 Difference]: With dead ends: 324 [2022-07-21 03:28:58,176 INFO L226 Difference]: Without dead ends: 210 [2022-07-21 03:28:58,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 03:28:58,177 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:58,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:28:58,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-21 03:28:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 194. [2022-07-21 03:28:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 114 states have internal predecessors, (136), 69 states have call successors, (69), 11 states have call predecessors, (69), 11 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-21 03:28:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 273 transitions. [2022-07-21 03:28:58,210 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 273 transitions. Word has length 68 [2022-07-21 03:28:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:58,211 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 273 transitions. [2022-07-21 03:28:58,211 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 03:28:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 273 transitions. [2022-07-21 03:28:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 03:28:58,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:58,212 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1] [2022-07-21 03:28:58,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:58,428 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 [2022-07-21 03:28:58,428 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2022-07-21 03:28:58,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:58,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090304617] [2022-07-21 03:28:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:58,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:58,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:58,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203978111] [2022-07-21 03:28:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:58,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:58,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:58,450 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) [2022-07-21 03:28:58,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 03:28:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 03:28:58,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-07-21 03:28:58,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:28:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-21 03:28:58,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:58,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090304617] [2022-07-21 03:28:58,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:58,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203978111] [2022-07-21 03:28:58,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203978111] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 03:28:58,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:28:58,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-07-21 03:28:58,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619831929] [2022-07-21 03:28:58,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:28:58,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:28:58,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:58,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:28:58,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:28:58,674 INFO L87 Difference]: Start difference. First operand 194 states and 273 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 03:28:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:28:58,728 INFO L93 Difference]: Finished difference Result 200 states and 278 transitions. [2022-07-21 03:28:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:28:58,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2022-07-21 03:28:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:28:58,730 INFO L225 Difference]: With dead ends: 200 [2022-07-21 03:28:58,730 INFO L226 Difference]: Without dead ends: 198 [2022-07-21 03:28:58,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-21 03:28:58,731 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:28:58,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:28:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-21 03:28:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-07-21 03:28:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 116 states have (on average 1.1982758620689655) internal successors, (139), 117 states have internal predecessors, (139), 69 states have call successors, (69), 12 states have call predecessors, (69), 12 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-21 03:28:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 276 transitions. [2022-07-21 03:28:58,758 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 276 transitions. Word has length 70 [2022-07-21 03:28:58,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:28:58,759 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 276 transitions. [2022-07-21 03:28:58,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 03:28:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 276 transitions. [2022-07-21 03:28:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 03:28:58,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:28:58,760 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:28:58,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 03:28:58,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 03:28:58,984 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:28:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:28:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2022-07-21 03:28:58,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:28:58,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812346753] [2022-07-21 03:28:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:58,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:28:58,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:28:58,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977498683] [2022-07-21 03:28:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:28:58,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:28:58,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:28:58,999 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:28:59,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 03:28:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:28:59,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 03:28:59,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:28:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 03:28:59,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:28:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 03:28:59,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:28:59,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812346753] [2022-07-21 03:28:59,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:28:59,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977498683] [2022-07-21 03:28:59,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977498683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:28:59,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:28:59,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-07-21 03:28:59,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28032847] [2022-07-21 03:28:59,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:28:59,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 03:28:59,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:28:59,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 03:28:59,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-21 03:28:59,450 INFO L87 Difference]: Start difference. First operand 198 states and 276 transitions. Second operand has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-21 03:29:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:29:00,194 INFO L93 Difference]: Finished difference Result 268 states and 365 transitions. [2022-07-21 03:29:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 03:29:00,195 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2022-07-21 03:29:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:29:00,197 INFO L225 Difference]: With dead ends: 268 [2022-07-21 03:29:00,197 INFO L226 Difference]: Without dead ends: 266 [2022-07-21 03:29:00,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-07-21 03:29:00,199 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 100 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 03:29:00,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 186 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 03:29:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-21 03:29:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 210. [2022-07-21 03:29:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 125 states have (on average 1.184) internal successors, (148), 126 states have internal predecessors, (148), 69 states have call successors, (69), 15 states have call predecessors, (69), 15 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-07-21 03:29:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 285 transitions. [2022-07-21 03:29:00,226 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 285 transitions. Word has length 68 [2022-07-21 03:29:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:29:00,227 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 285 transitions. [2022-07-21 03:29:00,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-21 03:29:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 285 transitions. [2022-07-21 03:29:00,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 03:29:00,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:29:00,228 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 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, 1, 1] [2022-07-21 03:29:00,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 03:29:00,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:29:00,439 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:29:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:29:00,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 2 times [2022-07-21 03:29:00,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:29:00,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121097100] [2022-07-21 03:29:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:29:00,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:29:00,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:29:00,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373245495] [2022-07-21 03:29:00,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:29:00,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:29:00,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:29:00,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:29:00,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 03:29:00,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:29:00,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:29:00,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-21 03:29:00,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:29:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-21 03:29:01,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:29:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 03:29:02,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:29:02,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121097100] [2022-07-21 03:29:02,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:29:02,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373245495] [2022-07-21 03:29:02,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373245495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:29:02,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:29:02,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-07-21 03:29:02,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216365598] [2022-07-21 03:29:02,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:29:02,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 03:29:02,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:29:02,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 03:29:02,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-07-21 03:29:02,377 INFO L87 Difference]: Start difference. First operand 210 states and 285 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2022-07-21 03:29:12,800 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 [] [2022-07-21 03:29:16,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:29:18,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:29:20,993 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:29:22,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:29:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:29:26,277 INFO L93 Difference]: Finished difference Result 297 states and 390 transitions. [2022-07-21 03:29:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 03:29:26,277 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 73 [2022-07-21 03:29:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:29:26,279 INFO L225 Difference]: With dead ends: 297 [2022-07-21 03:29:26,279 INFO L226 Difference]: Without dead ends: 295 [2022-07-21 03:29:26,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 03:29:26,281 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 128 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 293 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:29:26,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 309 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1009 Invalid, 5 Unknown, 0 Unchecked, 17.1s Time] [2022-07-21 03:29:26,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-21 03:29:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 245. [2022-07-21 03:29:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 152 states have (on average 1.1578947368421053) internal successors, (176), 154 states have internal predecessors, (176), 71 states have call successors, (71), 21 states have call predecessors, (71), 21 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2022-07-21 03:29:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 317 transitions. [2022-07-21 03:29:26,326 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 317 transitions. Word has length 73 [2022-07-21 03:29:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:29:26,327 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 317 transitions. [2022-07-21 03:29:26,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2022-07-21 03:29:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 317 transitions. [2022-07-21 03:29:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 03:29:26,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:29:26,328 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 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, 1, 1, 1, 1] [2022-07-21 03:29:26,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 03:29:26,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 03:29:26,529 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:29:26,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:29:26,529 INFO L85 PathProgramCache]: Analyzing trace with hash 593432004, now seen corresponding path program 1 times [2022-07-21 03:29:26,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:29:26,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559413221] [2022-07-21 03:29:26,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:29:26,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:29:26,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:29:26,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284052831] [2022-07-21 03:29:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:29:26,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:29:26,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:29:26,548 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:29:26,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 03:29:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:29:26,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 03:29:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:29:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-21 03:29:27,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:29:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-21 03:29:29,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:29:29,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559413221] [2022-07-21 03:29:29,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:29:29,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284052831] [2022-07-21 03:29:29,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284052831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:29:29,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:29:29,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-21 03:29:29,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155453237] [2022-07-21 03:29:29,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:29:29,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 03:29:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:29:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 03:29:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-07-21 03:29:29,228 INFO L87 Difference]: Start difference. First operand 245 states and 317 transitions. Second operand has 22 states, 20 states have (on average 2.35) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-21 03:29:34,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:29:37,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:29:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:29:46,953 INFO L93 Difference]: Finished difference Result 473 states and 661 transitions. [2022-07-21 03:29:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 03:29:46,954 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 82 [2022-07-21 03:29:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:29:46,956 INFO L225 Difference]: With dead ends: 473 [2022-07-21 03:29:46,956 INFO L226 Difference]: Without dead ends: 465 [2022-07-21 03:29:46,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=560, Invalid=2632, Unknown=0, NotChecked=0, Total=3192 [2022-07-21 03:29:46,958 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 128 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:29:46,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 388 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-07-21 03:29:46,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-07-21 03:29:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 390. [2022-07-21 03:29:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 243 states have (on average 1.1851851851851851) internal successors, (288), 246 states have internal predecessors, (288), 121 states have call successors, (121), 25 states have call predecessors, (121), 25 states have return successors, (120), 118 states have call predecessors, (120), 120 states have call successors, (120) [2022-07-21 03:29:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 529 transitions. [2022-07-21 03:29:47,058 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 529 transitions. Word has length 82 [2022-07-21 03:29:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:29:47,059 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 529 transitions. [2022-07-21 03:29:47,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-21 03:29:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 529 transitions. [2022-07-21 03:29:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-21 03:29:47,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:29:47,061 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:29:47,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-21 03:29:47,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 03:29:47,282 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:29:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:29:47,283 INFO L85 PathProgramCache]: Analyzing trace with hash 28846429, now seen corresponding path program 2 times [2022-07-21 03:29:47,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:29:47,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465345398] [2022-07-21 03:29:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:29:47,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:29:47,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:29:47,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251276391] [2022-07-21 03:29:47,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:29:47,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:29:47,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:29:47,298 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:29:47,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 03:29:47,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:29:47,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:29:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-21 03:29:47,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:29:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 86 proven. 74 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-07-21 03:29:48,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:29:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 93 proven. 41 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-21 03:29:56,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:29:56,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465345398] [2022-07-21 03:29:56,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:29:56,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251276391] [2022-07-21 03:29:56,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251276391] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:29:56,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:29:56,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-07-21 03:29:56,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265498731] [2022-07-21 03:29:56,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:29:56,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 03:29:56,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:29:56,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 03:29:56,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 03:29:56,822 INFO L87 Difference]: Start difference. First operand 390 states and 529 transitions. Second operand has 34 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 14 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-07-21 03:30:15,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:30:19,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:30:25,567 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:30:28,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:30:36,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:31:16,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:31:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:45,942 INFO L93 Difference]: Finished difference Result 570 states and 779 transitions. [2022-07-21 03:31:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-21 03:31:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 14 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 109 [2022-07-21 03:31:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:45,945 INFO L225 Difference]: With dead ends: 570 [2022-07-21 03:31:45,945 INFO L226 Difference]: Without dead ends: 562 [2022-07-21 03:31:45,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 197 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4541 ImplicationChecksByTransitivity, 80.2s TimeCoverageRelationStatistics Valid=2376, Invalid=12144, Unknown=0, NotChecked=0, Total=14520 [2022-07-21 03:31:45,949 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 238 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 2883 mSolverCounterSat, 644 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 3529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 2883 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.5s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:45,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 519 Invalid, 3529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [644 Valid, 2883 Invalid, 2 Unknown, 0 Unchecked, 34.5s Time] [2022-07-21 03:31:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-07-21 03:31:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 427. [2022-07-21 03:31:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 252 states have (on average 1.1944444444444444) internal successors, (301), 254 states have internal predecessors, (301), 143 states have call successors, (143), 31 states have call predecessors, (143), 31 states have return successors, (142), 141 states have call predecessors, (142), 142 states have call successors, (142) [2022-07-21 03:31:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 586 transitions. [2022-07-21 03:31:46,093 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 586 transitions. Word has length 109 [2022-07-21 03:31:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:46,094 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 586 transitions. [2022-07-21 03:31:46,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 14 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-07-21 03:31:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 586 transitions. [2022-07-21 03:31:46,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-21 03:31:46,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:46,096 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:46,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 03:31:46,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 03:31:46,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:46,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash -876975624, now seen corresponding path program 3 times [2022-07-21 03:31:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:46,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782509640] [2022-07-21 03:31:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:46,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:46,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:46,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783927516] [2022-07-21 03:31:46,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 03:31:46,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:46,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:46,315 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:46,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 03:31:46,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 03:31:46,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:31:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-21 03:31:46,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 82 proven. 40 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-07-21 03:31:47,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:54,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:54,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782509640] [2022-07-21 03:31:54,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:54,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783927516] [2022-07-21 03:31:54,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783927516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 03:31:54,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:31:54,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-21 03:31:54,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408183362] [2022-07-21 03:31:54,364 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:54,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 03:31:54,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:54,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 03:31:54,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=624, Unknown=1, NotChecked=0, Total=756 [2022-07-21 03:31:54,366 INFO L87 Difference]: Start difference. First operand 427 states and 586 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-21 03:31:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:31:56,625 INFO L93 Difference]: Finished difference Result 535 states and 728 transitions. [2022-07-21 03:31:56,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 03:31:56,625 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 112 [2022-07-21 03:31:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:31:56,628 INFO L225 Difference]: With dead ends: 535 [2022-07-21 03:31:56,628 INFO L226 Difference]: Without dead ends: 528 [2022-07-21 03:31:56,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=190, Invalid=931, Unknown=1, NotChecked=0, Total=1122 [2022-07-21 03:31:56,630 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 66 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 03:31:56,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 393 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-21 03:31:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-07-21 03:31:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 440. [2022-07-21 03:31:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 260 states have (on average 1.1961538461538461) internal successors, (311), 262 states have internal predecessors, (311), 147 states have call successors, (147), 32 states have call predecessors, (147), 32 states have return successors, (146), 145 states have call predecessors, (146), 146 states have call successors, (146) [2022-07-21 03:31:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 604 transitions. [2022-07-21 03:31:56,822 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 604 transitions. Word has length 112 [2022-07-21 03:31:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:31:56,823 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 604 transitions. [2022-07-21 03:31:56,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-21 03:31:56,828 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 604 transitions. [2022-07-21 03:31:56,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 03:31:56,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:31:56,830 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:31:56,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-21 03:31:57,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:57,043 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:31:57,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:31:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1576994048, now seen corresponding path program 1 times [2022-07-21 03:31:57,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:31:57,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912845733] [2022-07-21 03:31:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:57,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:31:57,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:31:57,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681593382] [2022-07-21 03:31:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:31:57,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:31:57,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:31:57,055 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:31:57,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 03:31:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:31:57,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 03:31:57,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:31:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 74 proven. 38 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2022-07-21 03:31:58,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:31:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 95 proven. 13 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2022-07-21 03:31:58,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:31:58,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912845733] [2022-07-21 03:31:58,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:31:58,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681593382] [2022-07-21 03:31:58,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681593382] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:31:58,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:31:58,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-07-21 03:31:58,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734045313] [2022-07-21 03:31:58,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:31:58,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 03:31:58,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:31:58,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 03:31:58,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-07-21 03:31:58,782 INFO L87 Difference]: Start difference. First operand 440 states and 604 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 8 states have call successors, (32) [2022-07-21 03:32:01,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:32:01,877 INFO L93 Difference]: Finished difference Result 779 states and 1057 transitions. [2022-07-21 03:32:01,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 03:32:01,877 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 8 states have call successors, (32) Word has length 120 [2022-07-21 03:32:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:32:01,880 INFO L225 Difference]: With dead ends: 779 [2022-07-21 03:32:01,880 INFO L226 Difference]: Without dead ends: 566 [2022-07-21 03:32:01,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=552, Invalid=1998, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 03:32:01,882 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-21 03:32:01,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 431 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-21 03:32:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-07-21 03:32:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 450. [2022-07-21 03:32:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 267 states have (on average 1.1835205992509363) internal successors, (316), 271 states have internal predecessors, (316), 147 states have call successors, (147), 35 states have call predecessors, (147), 35 states have return successors, (146), 143 states have call predecessors, (146), 146 states have call successors, (146) [2022-07-21 03:32:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 609 transitions. [2022-07-21 03:32:02,075 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 609 transitions. Word has length 120 [2022-07-21 03:32:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:32:02,076 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 609 transitions. [2022-07-21 03:32:02,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 8 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 8 states have call successors, (32) [2022-07-21 03:32:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 609 transitions. [2022-07-21 03:32:02,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-21 03:32:02,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:32:02,078 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:32:02,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 03:32:02,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:32:02,293 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:32:02,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:32:02,294 INFO L85 PathProgramCache]: Analyzing trace with hash -843376510, now seen corresponding path program 2 times [2022-07-21 03:32:02,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:32:02,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292490381] [2022-07-21 03:32:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:32:02,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:32:02,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:32:02,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774345933] [2022-07-21 03:32:02,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:32:02,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:32:02,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:32:02,317 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:32:02,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 03:32:02,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:32:02,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:32:02,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-21 03:32:02,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:32:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 118 proven. 71 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-07-21 03:32:03,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:32:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 146 proven. 19 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-07-21 03:32:12,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:32:12,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292490381] [2022-07-21 03:32:12,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:32:12,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774345933] [2022-07-21 03:32:12,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774345933] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:32:12,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:32:12,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 26 [2022-07-21 03:32:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457916347] [2022-07-21 03:32:12,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:32:12,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 03:32:12,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:32:12,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 03:32:12,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=548, Unknown=2, NotChecked=0, Total=650 [2022-07-21 03:32:12,635 INFO L87 Difference]: Start difference. First operand 450 states and 609 transitions. Second operand has 26 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-07-21 03:32:16,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:32:19,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:32:23,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:32:27,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:32:41,621 WARN L233 SmtUtils]: Spent 12.05s on a formula simplification. DAG size of input: 50 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 03:33:21,140 WARN L233 SmtUtils]: Spent 39.01s on a formula simplification. DAG size of input: 63 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 03:33:23,144 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 []