./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.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 4d17ed8dd7de3007f02b2c3df3a75e1fbb5469b0133c538c149df8a118a565d0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 16:40:08,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 16:40:08,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 16:40:08,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 16:40:08,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 16:40:08,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 16:40:08,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 16:40:08,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 16:40:08,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 16:40:08,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 16:40:08,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 16:40:08,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 16:40:08,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 16:40:08,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 16:40:08,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 16:40:08,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 16:40:08,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 16:40:08,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 16:40:08,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 16:40:08,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 16:40:08,560 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 16:40:08,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 16:40:08,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 16:40:08,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 16:40:08,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 16:40:08,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 16:40:08,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 16:40:08,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 16:40:08,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 16:40:08,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 16:40:08,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 16:40:08,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 16:40:08,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 16:40:08,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 16:40:08,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 16:40:08,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 16:40:08,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 16:40:08,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 16:40:08,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 16:40:08,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 16:40:08,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 16:40:08,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 16:40:08,582 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 16:40:08,616 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 16:40:08,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 16:40:08,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 16:40:08,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 16:40:08,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 16:40:08,618 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 16:40:08,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 16:40:08,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 16:40:08,619 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 16:40:08,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 16:40:08,620 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 16:40:08,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 16:40:08,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 16:40:08,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 16:40:08,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 16:40:08,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 16:40:08,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 16:40:08,621 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 16:40:08,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 16:40:08,621 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 16:40:08,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 16:40:08,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 16:40:08,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 16:40:08,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 16:40:08,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:40:08,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 16:40:08,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 16:40:08,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 16:40:08,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 16:40:08,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 16:40:08,623 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 16:40:08,624 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 16:40:08,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 16:40:08,624 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d17ed8dd7de3007f02b2c3df3a75e1fbb5469b0133c538c149df8a118a565d0 [2022-07-22 16:40:08,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 16:40:08,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 16:40:08,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 16:40:08,894 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 16:40:08,895 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 16:40:08,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2022-07-22 16:40:08,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7120711dd/94787096b6264f6d95b796c43b8cfd25/FLAG981008fa3 [2022-07-22 16:40:09,338 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 16:40:09,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2022-07-22 16:40:09,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7120711dd/94787096b6264f6d95b796c43b8cfd25/FLAG981008fa3 [2022-07-22 16:40:09,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7120711dd/94787096b6264f6d95b796c43b8cfd25 [2022-07-22 16:40:09,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 16:40:09,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 16:40:09,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 16:40:09,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 16:40:09,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 16:40:09,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f7559b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09, skipping insertion in model container [2022-07-22 16:40:09,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 16:40:09,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 16:40:09,583 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/prod4br-ll_unwindbound100.c[524,537] [2022-07-22 16:40:09,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:40:09,635 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 16:40:09,649 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/prod4br-ll_unwindbound100.c[524,537] [2022-07-22 16:40:09,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:40:09,688 INFO L208 MainTranslator]: Completed translation [2022-07-22 16:40:09,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09 WrapperNode [2022-07-22 16:40:09,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 16:40:09,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 16:40:09,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 16:40:09,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 16:40:09,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,734 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-07-22 16:40:09,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 16:40:09,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 16:40:09,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 16:40:09,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 16:40:09,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 16:40:09,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 16:40:09,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 16:40:09,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 16:40:09,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09" (1/1) ... [2022-07-22 16:40:09,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:40:09,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:09,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 16:40:09,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 16:40:09,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 16:40:09,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 16:40:09,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 16:40:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 16:40:09,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 16:40:09,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 16:40:09,909 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 16:40:09,910 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 16:40:10,035 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 16:40:10,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 16:40:10,041 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 16:40:10,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:40:10 BoogieIcfgContainer [2022-07-22 16:40:10,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 16:40:10,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 16:40:10,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 16:40:10,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 16:40:10,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 04:40:09" (1/3) ... [2022-07-22 16:40:10,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a69045d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:40:10, skipping insertion in model container [2022-07-22 16:40:10,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:09" (2/3) ... [2022-07-22 16:40:10,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a69045d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:40:10, skipping insertion in model container [2022-07-22 16:40:10,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:40:10" (3/3) ... [2022-07-22 16:40:10,051 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.c [2022-07-22 16:40:10,064 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 16:40:10,065 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 16:40:10,106 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 16:40:10,112 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@49d72e30, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3081dc9e [2022-07-22 16:40:10,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 16:40:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 16:40:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 16:40:10,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:10,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:10,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:10,129 INFO L85 PathProgramCache]: Analyzing trace with hash -563977895, now seen corresponding path program 1 times [2022-07-22 16:40:10,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:10,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319157536] [2022-07-22 16:40:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:10,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:10,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:10,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319157536] [2022-07-22 16:40:10,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319157536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:40:10,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:40:10,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 16:40:10,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980650487] [2022-07-22 16:40:10,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:40:10,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 16:40:10,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:10,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 16:40:10,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:40:10,303 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:10,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:10,325 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-07-22 16:40:10,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 16:40:10,328 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 16:40:10,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:10,335 INFO L225 Difference]: With dead ends: 43 [2022-07-22 16:40:10,336 INFO L226 Difference]: Without dead ends: 19 [2022-07-22 16:40:10,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:40:10,343 INFO L413 NwaCegarLoop]: 29 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, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:10,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:40:10,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-22 16:40:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-22 16:40:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-07-22 16:40:10,378 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2022-07-22 16:40:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:10,379 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-07-22 16:40:10,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-07-22 16:40:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 16:40:10,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:10,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:10,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 16:40:10,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:10,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1986058659, now seen corresponding path program 1 times [2022-07-22 16:40:10,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:10,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187537559] [2022-07-22 16:40:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:10,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:10,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:10,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187537559] [2022-07-22 16:40:10,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187537559] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:40:10,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:40:10,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 16:40:10,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093690387] [2022-07-22 16:40:10,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:40:10,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 16:40:10,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:10,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 16:40:10,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 16:40:10,478 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:10,516 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-07-22 16:40:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 16:40:10,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 16:40:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:10,517 INFO L225 Difference]: With dead ends: 29 [2022-07-22 16:40:10,517 INFO L226 Difference]: Without dead ends: 21 [2022-07-22 16:40:10,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 16:40:10,519 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:10,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:40:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-22 16:40:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-22 16:40:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-07-22 16:40:10,539 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2022-07-22 16:40:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:10,540 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-07-22 16:40:10,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-07-22 16:40:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 16:40:10,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:10,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:10,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 16:40:10,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1984271199, now seen corresponding path program 1 times [2022-07-22 16:40:10,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:10,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637944201] [2022-07-22 16:40:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:10,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:10,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187664257] [2022-07-22 16:40:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:10,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:10,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:10,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:10,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 16:40:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:10,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:40:10,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:10,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:40:10,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:10,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637944201] [2022-07-22 16:40:10,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:10,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187664257] [2022-07-22 16:40:10,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187664257] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:40:10,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:40:10,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:40:10,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617301377] [2022-07-22 16:40:10,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:40:10,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:40:10,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:10,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:40:10,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:40:10,745 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:10,849 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-07-22 16:40:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:40:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 16:40:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:10,851 INFO L225 Difference]: With dead ends: 34 [2022-07-22 16:40:10,851 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 16:40:10,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:40:10,853 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:10,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:40:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 16:40:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-07-22 16:40:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 16:40:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-07-22 16:40:10,861 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2022-07-22 16:40:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:10,863 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-07-22 16:40:10,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-07-22 16:40:10,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 16:40:10,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:10,866 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:10,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 16:40:11,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:11,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:11,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:11,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1194524114, now seen corresponding path program 1 times [2022-07-22 16:40:11,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:11,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674418850] [2022-07-22 16:40:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:11,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:11,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:11,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500004362] [2022-07-22 16:40:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:11,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:11,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:11,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:11,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 16:40:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:11,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 16:40:11,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:11,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:40:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:11,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:11,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674418850] [2022-07-22 16:40:11,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:11,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500004362] [2022-07-22 16:40:11,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500004362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:40:11,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:40:11,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-07-22 16:40:11,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062990581] [2022-07-22 16:40:11,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:40:11,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 16:40:11,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:11,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 16:40:11,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:40:11,724 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:12,173 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-07-22 16:40:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:40:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-07-22 16:40:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:12,176 INFO L225 Difference]: With dead ends: 47 [2022-07-22 16:40:12,176 INFO L226 Difference]: Without dead ends: 45 [2022-07-22 16:40:12,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-07-22 16:40:12,177 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:12,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 83 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 16:40:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-22 16:40:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-07-22 16:40:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 16:40:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-07-22 16:40:12,186 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2022-07-22 16:40:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:12,186 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-07-22 16:40:12,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-07-22 16:40:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 16:40:12,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:12,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:12,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 16:40:12,394 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,SelfDestructingSolverStorable3 [2022-07-22 16:40:12,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:12,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1756733383, now seen corresponding path program 1 times [2022-07-22 16:40:12,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:12,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888294449] [2022-07-22 16:40:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:12,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:12,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:12,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828025007] [2022-07-22 16:40:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:12,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:12,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:12,423 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 16:40:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 16:40:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:12,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:40:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:12,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:12,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888294449] [2022-07-22 16:40:12,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:12,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828025007] [2022-07-22 16:40:12,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828025007] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:40:12,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:40:12,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-22 16:40:12,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859821614] [2022-07-22 16:40:12,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:40:12,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 16:40:12,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 16:40:12,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:40:12,543 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:12,629 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-07-22 16:40:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 16:40:12,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-07-22 16:40:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:12,635 INFO L225 Difference]: With dead ends: 95 [2022-07-22 16:40:12,635 INFO L226 Difference]: Without dead ends: 85 [2022-07-22 16:40:12,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:40:12,638 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:12,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 124 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:40:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-22 16:40:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-07-22 16:40:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 61 states have internal predecessors, (77), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 16:40:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2022-07-22 16:40:12,662 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 19 [2022-07-22 16:40:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:12,662 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2022-07-22 16:40:12,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2022-07-22 16:40:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 16:40:12,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:12,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:12,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 16:40:12,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:12,879 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:12,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1754945923, now seen corresponding path program 1 times [2022-07-22 16:40:12,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:12,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897721421] [2022-07-22 16:40:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:12,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:12,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:12,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982514152] [2022-07-22 16:40:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:12,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:12,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:12,894 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:12,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 16:40:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:12,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 16:40:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:13,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:40:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897721421] [2022-07-22 16:40:14,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982514152] [2022-07-22 16:40:14,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982514152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:40:14,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:40:14,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-07-22 16:40:14,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361182460] [2022-07-22 16:40:14,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:40:14,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 16:40:14,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:14,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 16:40:14,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:40:14,084 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:15,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:15,699 INFO L93 Difference]: Finished difference Result 120 states and 157 transitions. [2022-07-22 16:40:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 16:40:15,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-07-22 16:40:15,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:15,703 INFO L225 Difference]: With dead ends: 120 [2022-07-22 16:40:15,703 INFO L226 Difference]: Without dead ends: 114 [2022-07-22 16:40:15,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:40:15,704 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:15,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 80 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 16:40:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-22 16:40:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 71. [2022-07-22 16:40:15,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 56 states have internal predecessors, (72), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:40:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-07-22 16:40:15,730 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 19 [2022-07-22 16:40:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:15,731 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-07-22 16:40:15,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-07-22 16:40:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 16:40:15,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:15,733 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:15,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 16:40:15,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:15,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:15,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1942139802, now seen corresponding path program 1 times [2022-07-22 16:40:15,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:15,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998618142] [2022-07-22 16:40:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:15,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:15,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:15,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366425998] [2022-07-22 16:40:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:15,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:15,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:15,984 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:15,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 16:40:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:16,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 16:40:16,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 16:40:16,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:40:16,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998618142] [2022-07-22 16:40:16,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:16,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366425998] [2022-07-22 16:40:16,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366425998] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:40:16,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:40:16,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 16:40:16,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711888772] [2022-07-22 16:40:16,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:40:16,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 16:40:16,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:16,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 16:40:16,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:40:16,078 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:16,223 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2022-07-22 16:40:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 16:40:16,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-07-22 16:40:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:16,225 INFO L225 Difference]: With dead ends: 108 [2022-07-22 16:40:16,225 INFO L226 Difference]: Without dead ends: 96 [2022-07-22 16:40:16,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:40:16,226 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:16,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 83 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:40:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-22 16:40:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-07-22 16:40:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 73 states have internal predecessors, (95), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 16:40:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2022-07-22 16:40:16,258 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 21 [2022-07-22 16:40:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:16,258 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2022-07-22 16:40:16,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:16,258 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2022-07-22 16:40:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 16:40:16,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:16,260 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:16,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 16:40:16,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:16,476 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:16,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1954557947, now seen corresponding path program 1 times [2022-07-22 16:40:16,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:16,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850299781] [2022-07-22 16:40:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:16,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:16,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:16,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336732705] [2022-07-22 16:40:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:16,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:16,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:16,488 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:16,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 16:40:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:16,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 16:40:16,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:40:16,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:40:16,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:16,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850299781] [2022-07-22 16:40:16,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:16,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336732705] [2022-07-22 16:40:16,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336732705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:40:16,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:40:16,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 16:40:16,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192982362] [2022-07-22 16:40:16,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:40:16,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 16:40:16,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:16,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 16:40:16,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:40:16,559 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 16:40:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:16,630 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2022-07-22 16:40:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:40:16,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-07-22 16:40:16,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:16,632 INFO L225 Difference]: With dead ends: 133 [2022-07-22 16:40:16,632 INFO L226 Difference]: Without dead ends: 121 [2022-07-22 16:40:16,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:40:16,633 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:16,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:40:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-22 16:40:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2022-07-22 16:40:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 84 states have internal predecessors, (107), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 16:40:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2022-07-22 16:40:16,663 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 32 [2022-07-22 16:40:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:16,663 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2022-07-22 16:40:16,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 16:40:16,664 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2022-07-22 16:40:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 16:40:16,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:16,670 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:16,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 16:40:16,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:16,884 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash 346264643, now seen corresponding path program 1 times [2022-07-22 16:40:16,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:16,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911834455] [2022-07-22 16:40:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:16,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:16,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:16,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732776436] [2022-07-22 16:40:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:16,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:16,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:16,895 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:16,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 16:40:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:16,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 16:40:16,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:40:17,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:40:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 16:40:17,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:17,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911834455] [2022-07-22 16:40:17,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:17,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732776436] [2022-07-22 16:40:17,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732776436] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 16:40:17,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:40:17,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 16:40:17,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939961750] [2022-07-22 16:40:17,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:40:17,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:40:17,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:17,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:40:17,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-22 16:40:17,103 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:17,253 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2022-07-22 16:40:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:40:17,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-07-22 16:40:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:17,258 INFO L225 Difference]: With dead ends: 112 [2022-07-22 16:40:17,258 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 16:40:17,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:40:17,259 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:17,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:40:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 16:40:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2022-07-22 16:40:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 16:40:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-22 16:40:17,265 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2022-07-22 16:40:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:17,266 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-22 16:40:17,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-22 16:40:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 16:40:17,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:17,267 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:17,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 16:40:17,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:17,467 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:17,468 INFO L85 PathProgramCache]: Analyzing trace with hash 136508765, now seen corresponding path program 2 times [2022-07-22 16:40:17,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:17,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24977539] [2022-07-22 16:40:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:17,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:17,488 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:17,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756667544] [2022-07-22 16:40:17,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:40:17,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:17,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:17,490 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:17,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 16:40:17,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:40:17,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:40:17,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:40:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:17,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:40:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 16:40:17,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:17,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24977539] [2022-07-22 16:40:17,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:17,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756667544] [2022-07-22 16:40:17,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756667544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:40:17,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:40:17,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-22 16:40:17,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536653256] [2022-07-22 16:40:17,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:40:17,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 16:40:17,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 16:40:17,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:40:17,726 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 16:40:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:17,879 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2022-07-22 16:40:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 16:40:17,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 46 [2022-07-22 16:40:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:17,881 INFO L225 Difference]: With dead ends: 132 [2022-07-22 16:40:17,881 INFO L226 Difference]: Without dead ends: 124 [2022-07-22 16:40:17,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-07-22 16:40:17,883 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 129 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:17,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 196 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:40:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-22 16:40:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-07-22 16:40:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.32) internal successors, (132), 101 states have internal predecessors, (132), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 16:40:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2022-07-22 16:40:17,895 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 46 [2022-07-22 16:40:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:17,896 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2022-07-22 16:40:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 16:40:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2022-07-22 16:40:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-22 16:40:17,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:17,897 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:17,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 16:40:18,111 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,SelfDestructingSolverStorable9 [2022-07-22 16:40:18,111 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:18,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1689445411, now seen corresponding path program 3 times [2022-07-22 16:40:18,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:18,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003120907] [2022-07-22 16:40:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:18,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:18,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:18,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500037083] [2022-07-22 16:40:18,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:40:18,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:18,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:18,125 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:18,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 16:40:18,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-22 16:40:18,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:40:18,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 16:40:18,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:18,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:40:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-22 16:40:18,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003120907] [2022-07-22 16:40:18,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500037083] [2022-07-22 16:40:18,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500037083] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:40:18,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:40:18,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-22 16:40:18,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532180999] [2022-07-22 16:40:18,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:40:18,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 16:40:18,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:18,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 16:40:18,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-07-22 16:40:18,865 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-22 16:40:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:19,325 INFO L93 Difference]: Finished difference Result 264 states and 343 transitions. [2022-07-22 16:40:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 16:40:19,325 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 100 [2022-07-22 16:40:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:19,328 INFO L225 Difference]: With dead ends: 264 [2022-07-22 16:40:19,328 INFO L226 Difference]: Without dead ends: 256 [2022-07-22 16:40:19,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 16:40:19,330 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 387 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:19,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 333 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 16:40:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-22 16:40:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-07-22 16:40:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 208 states have (on average 1.3269230769230769) internal successors, (276), 209 states have internal predecessors, (276), 24 states have call successors, (24), 23 states have call predecessors, (24), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-22 16:40:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 323 transitions. [2022-07-22 16:40:19,360 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 323 transitions. Word has length 100 [2022-07-22 16:40:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:19,360 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 323 transitions. [2022-07-22 16:40:19,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-22 16:40:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 323 transitions. [2022-07-22 16:40:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-22 16:40:19,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:19,363 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:19,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 16:40:19,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:19,569 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:19,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:19,570 INFO L85 PathProgramCache]: Analyzing trace with hash 482330845, now seen corresponding path program 4 times [2022-07-22 16:40:19,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:19,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528422422] [2022-07-22 16:40:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:19,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:19,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:19,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293649239] [2022-07-22 16:40:19,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:40:19,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:19,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:19,586 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:19,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 16:40:19,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:40:19,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:40:19,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 16:40:19,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:20,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:40:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-07-22 16:40:21,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:21,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528422422] [2022-07-22 16:40:21,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:21,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293649239] [2022-07-22 16:40:21,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293649239] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:40:21,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:40:21,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-07-22 16:40:21,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304188592] [2022-07-22 16:40:21,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:40:21,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 16:40:21,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 16:40:21,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 16:40:21,036 INFO L87 Difference]: Start difference. First operand 256 states and 323 transitions. Second operand has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-07-22 16:40:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:22,557 INFO L93 Difference]: Finished difference Result 528 states and 691 transitions. [2022-07-22 16:40:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-22 16:40:22,558 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Word has length 208 [2022-07-22 16:40:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:22,562 INFO L225 Difference]: With dead ends: 528 [2022-07-22 16:40:22,562 INFO L226 Difference]: Without dead ends: 520 [2022-07-22 16:40:22,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-07-22 16:40:22,565 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1344 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:22,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 628 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 16:40:22,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-07-22 16:40:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-07-22 16:40:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 424 states have (on average 1.330188679245283) internal successors, (564), 425 states have internal predecessors, (564), 48 states have call successors, (48), 47 states have call predecessors, (48), 47 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-07-22 16:40:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 659 transitions. [2022-07-22 16:40:22,602 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 659 transitions. Word has length 208 [2022-07-22 16:40:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:22,603 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 659 transitions. [2022-07-22 16:40:22,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-07-22 16:40:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 659 transitions. [2022-07-22 16:40:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2022-07-22 16:40:22,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:22,609 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:22,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-22 16:40:22,827 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,SelfDestructingSolverStorable11 [2022-07-22 16:40:22,827 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1031888163, now seen corresponding path program 5 times [2022-07-22 16:40:22,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:22,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400100108] [2022-07-22 16:40:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:22,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:22,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:22,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538995875] [2022-07-22 16:40:22,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 16:40:22,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:22,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:22,867 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:22,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 16:40:26,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-07-22 16:40:26,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:40:26,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-22 16:40:26,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9499 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:27,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:40:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9499 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2022-07-22 16:40:30,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:30,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400100108] [2022-07-22 16:40:30,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:30,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538995875] [2022-07-22 16:40:30,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538995875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:40:30,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:40:30,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 98 [2022-07-22 16:40:30,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685446540] [2022-07-22 16:40:30,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:40:30,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-22 16:40:30,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:30,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-22 16:40:30,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-07-22 16:40:30,256 INFO L87 Difference]: Start difference. First operand 520 states and 659 transitions. Second operand has 98 states, 98 states have (on average 5.346938775510204) internal successors, (524), 98 states have internal predecessors, (524), 93 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-07-22 16:40:35,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:35,442 INFO L93 Difference]: Finished difference Result 1056 states and 1387 transitions. [2022-07-22 16:40:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-07-22 16:40:35,443 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.346938775510204) internal successors, (524), 98 states have internal predecessors, (524), 93 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Word has length 424 [2022-07-22 16:40:35,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:35,449 INFO L225 Difference]: With dead ends: 1056 [2022-07-22 16:40:35,449 INFO L226 Difference]: Without dead ends: 1048 [2022-07-22 16:40:35,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 750 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-07-22 16:40:35,457 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 3026 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3026 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:35,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3026 Valid, 1225 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 16:40:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-07-22 16:40:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1048. [2022-07-22 16:40:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 856 states have (on average 1.3317757009345794) internal successors, (1140), 857 states have internal predecessors, (1140), 96 states have call successors, (96), 95 states have call predecessors, (96), 95 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-07-22 16:40:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1331 transitions. [2022-07-22 16:40:35,528 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1331 transitions. Word has length 424 [2022-07-22 16:40:35,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:35,529 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 1331 transitions. [2022-07-22 16:40:35,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.346938775510204) internal successors, (524), 98 states have internal predecessors, (524), 93 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-07-22 16:40:35,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1331 transitions. [2022-07-22 16:40:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2022-07-22 16:40:35,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:35,553 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:35,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 16:40:35,766 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,SelfDestructingSolverStorable12 [2022-07-22 16:40:35,766 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:35,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1549948637, now seen corresponding path program 6 times [2022-07-22 16:40:35,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:35,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736462391] [2022-07-22 16:40:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:35,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:35,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:35,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776241019] [2022-07-22 16:40:35,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 16:40:35,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:35,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:35,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:35,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process