./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/hard-ll_valuebound2.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 9851f41ad4fb2d0ff96507e8e48f0d2886a8de6481eed845b23377b9fa492b45 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 12:36:02,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 12:36:02,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 12:36:02,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 12:36:02,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 12:36:02,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 12:36:02,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 12:36:02,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 12:36:02,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 12:36:02,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 12:36:02,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 12:36:02,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 12:36:02,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 12:36:02,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 12:36:02,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 12:36:02,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 12:36:02,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 12:36:02,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 12:36:02,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 12:36:02,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 12:36:02,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 12:36:02,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 12:36:02,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 12:36:02,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 12:36:02,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 12:36:02,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 12:36:02,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 12:36:02,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 12:36:02,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 12:36:02,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 12:36:02,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 12:36:02,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 12:36:02,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 12:36:02,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 12:36:02,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 12:36:02,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 12:36:02,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 12:36:02,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 12:36:02,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 12:36:02,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 12:36:02,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 12:36:02,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 12:36:02,853 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 12:36:02,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 12:36:02,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 12:36:02,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 12:36:02,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 12:36:02,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 12:36:02,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 12:36:02,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 12:36:02,855 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 12:36:02,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 12:36:02,856 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 12:36:02,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 12:36:02,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 12:36:02,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 12:36:02,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 12:36:02,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 12:36:02,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 12:36:02,857 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 12:36:02,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 12:36:02,858 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 12:36:02,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 12:36:02,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 12:36:02,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 12:36:02,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 12:36:02,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 12:36:02,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 12:36:02,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 12:36:02,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 12:36:02,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 12:36:02,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 12:36:02,861 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 12:36:02,861 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 12:36:02,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 12:36:02,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 12:36:02,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9851f41ad4fb2d0ff96507e8e48f0d2886a8de6481eed845b23377b9fa492b45 [2021-12-17 12:36:03,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 12:36:03,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 12:36:03,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 12:36:03,032 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 12:36:03,033 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 12:36:03,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c [2021-12-17 12:36:03,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/981aeafb0/6fba076077b04ccf8e376c8d75553d10/FLAGbbafa8c3c [2021-12-17 12:36:03,430 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 12:36:03,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c [2021-12-17 12:36:03,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/981aeafb0/6fba076077b04ccf8e376c8d75553d10/FLAGbbafa8c3c [2021-12-17 12:36:03,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/981aeafb0/6fba076077b04ccf8e376c8d75553d10 [2021-12-17 12:36:03,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 12:36:03,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 12:36:03,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 12:36:03,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 12:36:03,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 12:36:03,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7941d510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03, skipping insertion in model container [2021-12-17 12:36:03,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 12:36:03,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 12:36:03,594 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/hard-ll_valuebound2.c[538,551] [2021-12-17 12:36:03,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 12:36:03,608 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 12:36:03,615 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/hard-ll_valuebound2.c[538,551] [2021-12-17 12:36:03,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 12:36:03,627 INFO L208 MainTranslator]: Completed translation [2021-12-17 12:36:03,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03 WrapperNode [2021-12-17 12:36:03,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 12:36:03,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 12:36:03,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 12:36:03,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 12:36:03,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,647 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2021-12-17 12:36:03,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 12:36:03,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 12:36:03,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 12:36:03,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 12:36:03,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 12:36:03,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 12:36:03,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 12:36:03,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 12:36:03,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03" (1/1) ... [2021-12-17 12:36:03,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 12:36:03,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:36:03,681 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) [2021-12-17 12:36:03,685 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 [2021-12-17 12:36:03,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 12:36:03,703 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 12:36:03,703 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 12:36:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 12:36:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 12:36:03,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 12:36:03,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 12:36:03,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 12:36:03,741 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 12:36:03,742 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 12:36:03,824 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 12:36:03,828 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 12:36:03,828 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 12:36:03,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:36:03 BoogieIcfgContainer [2021-12-17 12:36:03,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 12:36:03,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 12:36:03,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 12:36:03,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 12:36:03,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:36:03" (1/3) ... [2021-12-17 12:36:03,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6164d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:36:03, skipping insertion in model container [2021-12-17 12:36:03,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:36:03" (2/3) ... [2021-12-17 12:36:03,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6164d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:36:03, skipping insertion in model container [2021-12-17 12:36:03,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:36:03" (3/3) ... [2021-12-17 12:36:03,834 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound2.c [2021-12-17 12:36:03,837 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 12:36:03,837 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 12:36:03,865 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 12:36:03,870 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 12:36:03,870 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 12:36:03,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 12:36:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 12:36:03,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:03,891 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:03,892 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:03,895 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2021-12-17 12:36:03,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:03,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484986684] [2021-12-17 12:36:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:03,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 12:36:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 12:36:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 12:36:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 12:36:04,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:04,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484986684] [2021-12-17 12:36:04,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484986684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:36:04,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:36:04,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 12:36:04,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854457345] [2021-12-17 12:36:04,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:36:04,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 12:36:04,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 12:36:04,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 12:36:04,111 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 12:36:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:04,125 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2021-12-17 12:36:04,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 12:36:04,127 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-12-17 12:36:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:04,131 INFO L225 Difference]: With dead ends: 63 [2021-12-17 12:36:04,147 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 12:36:04,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 12:36:04,152 INFO L933 BasicCegarLoop]: 43 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, 43 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 [2021-12-17 12:36:04,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:36:04,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 12:36:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-17 12:36:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 12:36:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-12-17 12:36:04,190 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2021-12-17 12:36:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:04,191 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-12-17 12:36:04,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 12:36:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-12-17 12:36:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 12:36:04,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:04,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:04,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 12:36:04,195 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2021-12-17 12:36:04,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:04,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089149729] [2021-12-17 12:36:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:04,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 12:36:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 12:36:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 12:36:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 12:36:04,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089149729] [2021-12-17 12:36:04,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089149729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:36:04,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:36:04,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:36:04,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347102193] [2021-12-17 12:36:04,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:36:04,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:36:04,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:04,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:36:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:36:04,323 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 12:36:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:04,363 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-12-17 12:36:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 12:36:04,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-12-17 12:36:04,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:04,364 INFO L225 Difference]: With dead ends: 42 [2021-12-17 12:36:04,364 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 12:36:04,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:36:04,366 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:36:04,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 134 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:36:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 12:36:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-12-17 12:36:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 12:36:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-17 12:36:04,378 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2021-12-17 12:36:04,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:04,379 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-17 12:36:04,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 12:36:04,380 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-17 12:36:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 12:36:04,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:04,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:04,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 12:36:04,382 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:04,382 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2021-12-17 12:36:04,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:04,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489973494] [2021-12-17 12:36:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:04,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 12:36:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 12:36:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 12:36:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 12:36:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 12:36:04,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:04,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489973494] [2021-12-17 12:36:04,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489973494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:36:04,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:36:04,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:36:04,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59519167] [2021-12-17 12:36:04,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:36:04,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:36:04,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:04,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:36:04,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:36:04,478 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 12:36:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:04,539 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-12-17 12:36:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 12:36:04,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-17 12:36:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:04,541 INFO L225 Difference]: With dead ends: 46 [2021-12-17 12:36:04,542 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 12:36:04,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:36:04,543 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:36:04,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 130 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:36:04,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 12:36:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-12-17 12:36:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 12:36:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-12-17 12:36:04,553 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2021-12-17 12:36:04,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:04,555 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-12-17 12:36:04,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 12:36:04,555 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-12-17 12:36:04,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 12:36:04,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:04,555 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:04,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 12:36:04,556 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:04,556 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2021-12-17 12:36:04,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:04,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540296398] [2021-12-17 12:36:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:04,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:04,564 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:36:04,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128825443] [2021-12-17 12:36:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:04,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:04,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:36:04,577 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) [2021-12-17 12:36:04,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 12:36:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:04,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 12:36:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:36:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 12:36:04,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:36:04,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:04,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540296398] [2021-12-17 12:36:04,751 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:36:04,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128825443] [2021-12-17 12:36:04,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128825443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:36:04,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:36:04,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:36:04,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484540402] [2021-12-17 12:36:04,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:36:04,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:36:04,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:04,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:36:04,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:36:04,756 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 12:36:04,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:04,817 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2021-12-17 12:36:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:36:04,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-12-17 12:36:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:04,819 INFO L225 Difference]: With dead ends: 65 [2021-12-17 12:36:04,820 INFO L226 Difference]: Without dead ends: 51 [2021-12-17 12:36:04,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:36:04,826 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:36:04,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:36:04,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-17 12:36:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-17 12:36:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 12:36:04,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-17 12:36:04,838 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 34 [2021-12-17 12:36:04,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:04,839 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-17 12:36:04,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 12:36:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-17 12:36:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 12:36:04,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:04,840 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:04,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 12:36:05,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:05,057 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:05,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:05,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2021-12-17 12:36:05,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:05,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473249553] [2021-12-17 12:36:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:05,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:05,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:36:05,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212549368] [2021-12-17 12:36:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:05,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:05,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:36:05,068 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) [2021-12-17 12:36:05,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 12:36:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:05,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 12:36:05,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:36:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 12:36:05,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:36:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 12:36:05,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:05,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473249553] [2021-12-17 12:36:05,447 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:36:05,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212549368] [2021-12-17 12:36:05,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212549368] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 12:36:05,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:36:05,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-17 12:36:05,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688397976] [2021-12-17 12:36:05,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:36:05,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 12:36:05,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:05,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 12:36:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 12:36:05,449 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:36:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:05,491 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2021-12-17 12:36:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:36:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2021-12-17 12:36:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:05,492 INFO L225 Difference]: With dead ends: 64 [2021-12-17 12:36:05,492 INFO L226 Difference]: Without dead ends: 62 [2021-12-17 12:36:05,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-17 12:36:05,493 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:36:05,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 158 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:36:05,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-17 12:36:05,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-12-17 12:36:05,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 12:36:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-12-17 12:36:05,500 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 41 [2021-12-17 12:36:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:05,500 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-12-17 12:36:05,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:36:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-12-17 12:36:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 12:36:05,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:05,502 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:05,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 12:36:05,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:05,707 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:05,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2021-12-17 12:36:05,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:05,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745039483] [2021-12-17 12:36:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:05,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:05,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:36:05,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221186905] [2021-12-17 12:36:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:05,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:05,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:36:05,723 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) [2021-12-17 12:36:05,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 12:36:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 12:36:05,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:36:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 12:36:05,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:36:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-17 12:36:06,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:06,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745039483] [2021-12-17 12:36:06,014 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:36:06,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221186905] [2021-12-17 12:36:06,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221186905] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 12:36:06,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:36:06,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-17 12:36:06,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20961811] [2021-12-17 12:36:06,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:36:06,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:36:06,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:06,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:36:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 12:36:06,015 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:36:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:06,063 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2021-12-17 12:36:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:36:06,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2021-12-17 12:36:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:06,064 INFO L225 Difference]: With dead ends: 72 [2021-12-17 12:36:06,065 INFO L226 Difference]: Without dead ends: 70 [2021-12-17 12:36:06,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 12:36:06,065 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:36:06,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:36:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-17 12:36:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-12-17 12:36:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 12:36:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2021-12-17 12:36:06,073 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 51 [2021-12-17 12:36:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:06,073 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2021-12-17 12:36:06,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:36:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2021-12-17 12:36:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 12:36:06,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:06,074 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:06,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 12:36:06,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:06,291 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:06,292 INFO L85 PathProgramCache]: Analyzing trace with hash 957489548, now seen corresponding path program 1 times [2021-12-17 12:36:06,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:06,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647554425] [2021-12-17 12:36:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:06,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:06,302 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:36:06,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414499117] [2021-12-17 12:36:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:06,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:36:06,307 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) [2021-12-17 12:36:06,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 12:36:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 12:36:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:36:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 12:36:06,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:36:06,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:06,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647554425] [2021-12-17 12:36:06,456 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:36:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414499117] [2021-12-17 12:36:06,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414499117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:36:06,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:36:06,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:36:06,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922249630] [2021-12-17 12:36:06,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:36:06,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:36:06,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:06,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:36:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:36:06,458 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 12:36:06,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:06,519 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2021-12-17 12:36:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:36:06,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-12-17 12:36:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:06,521 INFO L225 Difference]: With dead ends: 75 [2021-12-17 12:36:06,521 INFO L226 Difference]: Without dead ends: 68 [2021-12-17 12:36:06,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:36:06,522 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:36:06,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:36:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-17 12:36:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-17 12:36:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-17 12:36:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2021-12-17 12:36:06,527 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 52 [2021-12-17 12:36:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:06,528 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2021-12-17 12:36:06,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 12:36:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2021-12-17 12:36:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 12:36:06,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:06,531 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:06,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 12:36:06,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:06,751 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:06,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2021-12-17 12:36:06,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:06,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934290221] [2021-12-17 12:36:06,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:06,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:06,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:36:06,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664367496] [2021-12-17 12:36:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:06,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:06,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:36:06,759 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) [2021-12-17 12:36:06,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 12:36:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:06,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 12:36:06,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:36:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-17 12:36:07,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:36:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-17 12:36:08,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:08,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934290221] [2021-12-17 12:36:08,470 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:36:08,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664367496] [2021-12-17 12:36:08,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664367496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:36:08,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:36:08,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-12-17 12:36:08,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102764766] [2021-12-17 12:36:08,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:36:08,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 12:36:08,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:08,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 12:36:08,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-12-17 12:36:08,473 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-12-17 12:36:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:18,221 INFO L93 Difference]: Finished difference Result 146 states and 194 transitions. [2021-12-17 12:36:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 12:36:18,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 71 [2021-12-17 12:36:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:18,223 INFO L225 Difference]: With dead ends: 146 [2021-12-17 12:36:18,223 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 12:36:18,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-12-17 12:36:18,224 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-17 12:36:18,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 287 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-17 12:36:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 12:36:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-12-17 12:36:18,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 12:36:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-12-17 12:36:18,234 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 71 [2021-12-17 12:36:18,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:18,234 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-12-17 12:36:18,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-12-17 12:36:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-12-17 12:36:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-17 12:36:18,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:18,235 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:18,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 12:36:18,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:18,449 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2021-12-17 12:36:18,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:18,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130241670] [2021-12-17 12:36:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:18,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:18,462 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:36:18,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620919625] [2021-12-17 12:36:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:18,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:18,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:36:18,464 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) [2021-12-17 12:36:18,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 12:36:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 12:36:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:36:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-17 12:36:18,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:36:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-17 12:36:20,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:20,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130241670] [2021-12-17 12:36:20,638 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:36:20,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620919625] [2021-12-17 12:36:20,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620919625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:36:20,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:36:20,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-12-17 12:36:20,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311495108] [2021-12-17 12:36:20,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:36:20,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 12:36:20,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:20,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 12:36:20,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-12-17 12:36:20,640 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-17 12:36:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:21,408 INFO L93 Difference]: Finished difference Result 139 states and 171 transitions. [2021-12-17 12:36:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 12:36:21,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 82 [2021-12-17 12:36:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:21,413 INFO L225 Difference]: With dead ends: 139 [2021-12-17 12:36:21,413 INFO L226 Difference]: Without dead ends: 103 [2021-12-17 12:36:21,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-12-17 12:36:21,414 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 20 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 12:36:21,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 341 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 12:36:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-17 12:36:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2021-12-17 12:36:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 58 states have internal predecessors, (62), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 12:36:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-12-17 12:36:21,422 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 82 [2021-12-17 12:36:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:21,423 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-12-17 12:36:21,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-17 12:36:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-12-17 12:36:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 12:36:21,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:21,424 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:21,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 12:36:21,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:21,629 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:21,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:21,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1888027627, now seen corresponding path program 2 times [2021-12-17 12:36:21,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:21,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098850279] [2021-12-17 12:36:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:21,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:21,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:36:21,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478935728] [2021-12-17 12:36:21,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 12:36:21,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:21,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:36:21,637 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) [2021-12-17 12:36:21,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 12:36:21,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 12:36:21,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:36:21,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 12:36:21,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:36:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-17 12:36:21,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:36:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-17 12:36:21,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098850279] [2021-12-17 12:36:21,924 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:36:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478935728] [2021-12-17 12:36:21,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478935728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:36:21,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:36:21,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-12-17 12:36:21,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189334347] [2021-12-17 12:36:21,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:36:21,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:36:21,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:36:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:36:21,926 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-17 12:36:21,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:21,968 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2021-12-17 12:36:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 12:36:21,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 84 [2021-12-17 12:36:21,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:21,971 INFO L225 Difference]: With dead ends: 115 [2021-12-17 12:36:21,972 INFO L226 Difference]: Without dead ends: 96 [2021-12-17 12:36:21,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:36:21,974 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:36:21,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:36:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-17 12:36:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-17 12:36:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 61 states have internal predecessors, (65), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 12:36:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2021-12-17 12:36:21,991 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 84 [2021-12-17 12:36:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:21,992 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2021-12-17 12:36:21,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-17 12:36:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2021-12-17 12:36:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 12:36:21,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:21,996 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:22,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 12:36:22,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:22,211 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:22,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1729716470, now seen corresponding path program 1 times [2021-12-17 12:36:22,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:22,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632234870] [2021-12-17 12:36:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:22,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:22,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:36:22,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270823142] [2021-12-17 12:36:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:22,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:22,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:36:22,223 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) [2021-12-17 12:36:22,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 12:36:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:22,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 12:36:22,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:36:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-17 12:36:22,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:36:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-17 12:36:22,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:22,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632234870] [2021-12-17 12:36:22,779 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:36:22,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270823142] [2021-12-17 12:36:22,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270823142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:36:22,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:36:22,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-17 12:36:22,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931280568] [2021-12-17 12:36:22,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:36:22,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 12:36:22,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 12:36:22,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-17 12:36:22,781 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-12-17 12:36:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:22,998 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-12-17 12:36:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 12:36:22,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 87 [2021-12-17 12:36:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:23,001 INFO L225 Difference]: With dead ends: 104 [2021-12-17 12:36:23,001 INFO L226 Difference]: Without dead ends: 87 [2021-12-17 12:36:23,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-17 12:36:23,002 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 12:36:23,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 258 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 12:36:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-17 12:36:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-17 12:36:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 22 states have call successors, (22), 11 states have call predecessors, (22), 11 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 12:36:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-12-17 12:36:23,013 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 87 [2021-12-17 12:36:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:23,014 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-12-17 12:36:23,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-12-17 12:36:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-12-17 12:36:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 12:36:23,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:23,015 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:23,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 12:36:23,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 12:36:23,232 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:23,232 INFO L85 PathProgramCache]: Analyzing trace with hash -219918921, now seen corresponding path program 1 times [2021-12-17 12:36:23,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:23,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402545996] [2021-12-17 12:36:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:23,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:23,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:36:23,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214752262] [2021-12-17 12:36:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:23,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:23,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:36:23,239 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) [2021-12-17 12:36:23,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 12:36:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:36:23,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 12:36:23,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:36:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-17 12:36:23,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:36:23,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:36:23,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402545996] [2021-12-17 12:36:23,420 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:36:23,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214752262] [2021-12-17 12:36:23,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214752262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:36:23,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:36:23,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:36:23,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281661875] [2021-12-17 12:36:23,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:36:23,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:36:23,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:36:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:36:23,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:36:23,422 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-17 12:36:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:36:23,455 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-12-17 12:36:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:36:23,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-12-17 12:36:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:36:23,457 INFO L225 Difference]: With dead ends: 94 [2021-12-17 12:36:23,457 INFO L226 Difference]: Without dead ends: 82 [2021-12-17 12:36:23,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:36:23,457 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:36:23,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 116 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:36:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-17 12:36:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-12-17 12:36:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 12:36:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2021-12-17 12:36:23,463 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 91 [2021-12-17 12:36:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:36:23,464 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2021-12-17 12:36:23,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-17 12:36:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2021-12-17 12:36:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 12:36:23,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:36:23,465 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:36:23,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 12:36:23,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:23,679 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:36:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:36:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 3 times [2021-12-17 12:36:23,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:36:23,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978860025] [2021-12-17 12:36:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:36:23,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:36:23,693 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:36:23,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588184820] [2021-12-17 12:36:23,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 12:36:23,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:36:23,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:36:23,697 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) [2021-12-17 12:36:23,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 12:36:23,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 12:36:23,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:36:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 12:36:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:38:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 69 proven. 23 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-17 12:38:50,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:40:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 69 proven. 13 refuted. 10 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-17 12:40:39,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:40:39,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978860025] [2021-12-17 12:40:39,296 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:40:39,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588184820] [2021-12-17 12:40:39,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588184820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:40:39,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:40:39,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-12-17 12:40:39,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283449033] [2021-12-17 12:40:39,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:40:39,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 12:40:39,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:40:39,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 12:40:39,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=509, Unknown=3, NotChecked=0, Total=600 [2021-12-17 12:40:39,298 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 21 states have internal predecessors, (49), 11 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-17 12:40:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:40:44,513 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2021-12-17 12:40:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 12:40:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 21 states have internal predecessors, (49), 11 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) Word has length 101 [2021-12-17 12:40:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:40:44,514 INFO L225 Difference]: With dead ends: 132 [2021-12-17 12:40:44,514 INFO L226 Difference]: Without dead ends: 83 [2021-12-17 12:40:44,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=169, Invalid=883, Unknown=4, NotChecked=0, Total=1056 [2021-12-17 12:40:44,515 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:40:44,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 477 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 430 Invalid, 0 Unknown, 13 Unchecked, 1.1s Time] [2021-12-17 12:40:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-17 12:40:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-17 12:40:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 12:40:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2021-12-17 12:40:44,520 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 101 [2021-12-17 12:40:44,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:40:44,521 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2021-12-17 12:40:44,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 21 states have internal predecessors, (49), 11 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-17 12:40:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2021-12-17 12:40:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 12:40:44,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:40:44,522 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:40:44,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 12:40:44,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 12:40:44,728 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:40:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:40:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash 845989083, now seen corresponding path program 1 times [2021-12-17 12:40:44,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:40:44,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114894308] [2021-12-17 12:40:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:40:44,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:40:44,738 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:40:44,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372251955] [2021-12-17 12:40:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:40:44,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:40:44,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:40:44,740 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) [2021-12-17 12:40:44,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 12:40:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:40:44,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 12:40:44,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:41:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-12-17 12:41:04,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:42:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 66 proven. 27 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-12-17 12:42:26,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:42:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114894308] [2021-12-17 12:42:26,789 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:42:26,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372251955] [2021-12-17 12:42:26,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372251955] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:42:26,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:42:26,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2021-12-17 12:42:26,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007212118] [2021-12-17 12:42:26,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:42:26,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 12:42:26,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:42:26,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 12:42:26,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-12-17 12:42:26,791 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 28 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 16 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 14 states have call successors, (34) [2021-12-17 12:42:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:42:29,698 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2021-12-17 12:42:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 12:42:29,699 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 16 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 14 states have call successors, (34) Word has length 106 [2021-12-17 12:42:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:42:29,699 INFO L225 Difference]: With dead ends: 97 [2021-12-17 12:42:29,699 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 12:42:29,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 12:42:29,700 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 61 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 12:42:29,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 376 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 12:42:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 12:42:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 12:42:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 12:42:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 12:42:29,701 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2021-12-17 12:42:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:42:29,701 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 12:42:29,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 16 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 14 states have call successors, (34) [2021-12-17 12:42:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 12:42:29,701 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 12:42:29,703 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 12:42:29,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 12:42:29,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 12:42:29,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 12:42:37,551 INFO L854 garLoopResultBuilder]: At program point L60(line 60) the Hoare annotation is: (and (= |ULTIMATE.start_main_~d~0#1| (mod |ULTIMATE.start_main_~B~0#1| 4294967296)) (= |ULTIMATE.start_main_~p~0#1| 1)) [2021-12-17 12:42:37,551 INFO L858 garLoopResultBuilder]: For program point L48(lines 46 58) no Hoare annotation was computed. [2021-12-17 12:42:37,551 INFO L854 garLoopResultBuilder]: At program point L36-2(lines 36 44) the Hoare annotation is: (let ((.cse7 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse4 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse5 (* .cse7 |ULTIMATE.start_main_~p~0#1|))) (let ((.cse0 (<= 1 .cse7)) (.cse6 (* .cse7 |ULTIMATE.start_main_~q~0#1|)) (.cse1 (= (+ (* 4294967296 (div |ULTIMATE.start_main_~A~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_main_~d~0#1| .cse5)) (.cse3 (<= .cse4 2))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~q~0#1| 0) .cse2 .cse3) (and .cse0 (<= (div (* |ULTIMATE.start_main_~d~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~r~0#1|) .cse1 (= (+ .cse4 |ULTIMATE.start_main_~d~0#1|) (+ |ULTIMATE.start_main_~r~0#1| .cse5 .cse6)) (<= .cse7 (div (div |ULTIMATE.start_main_~d~0#1| 2) 2)) .cse2 .cse3) (and .cse0 (= .cse4 (+ |ULTIMATE.start_main_~r~0#1| .cse6)) .cse1 (<= .cse7 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 2 .cse7))))))) [2021-12-17 12:42:37,551 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 12:42:37,551 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 12:42:37,551 INFO L858 garLoopResultBuilder]: For program point L61(line 61) no Hoare annotation was computed. [2021-12-17 12:42:37,551 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 12:42:37,551 INFO L854 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (<= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) 2) [2021-12-17 12:42:37,551 INFO L854 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: (<= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) 2) [2021-12-17 12:42:37,551 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse7 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse4 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse5 (* .cse7 |ULTIMATE.start_main_~p~0#1|))) (let ((.cse0 (<= 1 .cse7)) (.cse6 (* .cse7 |ULTIMATE.start_main_~q~0#1|)) (.cse1 (= (+ (* 4294967296 (div |ULTIMATE.start_main_~A~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_main_~d~0#1| .cse5)) (.cse3 (<= .cse4 2))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~q~0#1| 0) .cse2 .cse3) (and .cse0 (<= (div (* |ULTIMATE.start_main_~d~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~r~0#1|) .cse1 (= (+ .cse4 |ULTIMATE.start_main_~d~0#1|) (+ |ULTIMATE.start_main_~r~0#1| .cse5 .cse6)) (<= .cse7 (div (div |ULTIMATE.start_main_~d~0#1| 2) 2)) .cse2 .cse3) (and .cse0 (= .cse4 (+ |ULTIMATE.start_main_~r~0#1| .cse6)) .cse1 (<= .cse7 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 2 .cse7))))))) [2021-12-17 12:42:37,551 INFO L854 garLoopResultBuilder]: At program point L37-1(line 37) the Hoare annotation is: (let ((.cse7 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse4 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse5 (* .cse7 |ULTIMATE.start_main_~p~0#1|))) (let ((.cse0 (<= 1 .cse7)) (.cse6 (* .cse7 |ULTIMATE.start_main_~q~0#1|)) (.cse1 (= (+ (* 4294967296 (div |ULTIMATE.start_main_~A~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_main_~d~0#1| .cse5)) (.cse3 (<= .cse4 2))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~q~0#1| 0) .cse2 .cse3) (and .cse0 (<= (div (* |ULTIMATE.start_main_~d~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~r~0#1|) .cse1 (= (+ .cse4 |ULTIMATE.start_main_~d~0#1|) (+ |ULTIMATE.start_main_~r~0#1| .cse5 .cse6)) (<= .cse7 (div (div |ULTIMATE.start_main_~d~0#1| 2) 2)) .cse2 .cse3) (and .cse0 (= .cse4 (+ |ULTIMATE.start_main_~r~0#1| .cse6)) .cse1 (<= .cse7 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 2 .cse7))))))) [2021-12-17 12:42:37,551 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 12:42:37,552 INFO L861 garLoopResultBuilder]: At program point L62(lines 22 63) the Hoare annotation is: true [2021-12-17 12:42:37,552 INFO L858 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2021-12-17 12:42:37,552 INFO L858 garLoopResultBuilder]: For program point L54(lines 54 57) no Hoare annotation was computed. [2021-12-17 12:42:37,552 INFO L858 garLoopResultBuilder]: For program point L54-2(lines 22 63) no Hoare annotation was computed. [2021-12-17 12:42:37,552 INFO L854 garLoopResultBuilder]: At program point L46-1(lines 46 58) the Hoare annotation is: (let ((.cse5 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse2 (* .cse5 |ULTIMATE.start_main_~p~0#1|)) (.cse4 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse9 (* .cse5 |ULTIMATE.start_main_~q~0#1|))) (let ((.cse0 (= .cse4 (+ |ULTIMATE.start_main_~r~0#1| .cse9))) (.cse1 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse3 (= (+ .cse4 |ULTIMATE.start_main_~d~0#1|) (+ |ULTIMATE.start_main_~r~0#1| .cse2 .cse9)))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| .cse2)) (and (= |ULTIMATE.start_main_~q~0#1| 2) .cse0 .cse1 .cse3 (<= 0 |ULTIMATE.start_main_~r~0#1|) (<= .cse4 2) (let ((.cse8 (+ .cse5 (- 1)))) (< (let ((.cse7 (* (div (+ |ULTIMATE.start_main_~d~0#1| 1) (- 2)) (- 1)))) (let ((.cse6 (div (+ .cse5 .cse7 1) 2))) (+ (div (+ (* (div (+ (* .cse5 (- 1)) (- 1)) (- 2)) (- 1)) .cse6) (- 1073741824)) (div (+ .cse5 .cse7 (- 1)) (- 2147483648)) (div (+ .cse6 (- 1)) (- 1073741824)) (div .cse8 (- 1073741824))))) (+ (div .cse8 1073741824) 1)))) (and (<= |ULTIMATE.start_main_~d~0#1| .cse4) .cse0 .cse1 (= |ULTIMATE.start_main_~q~0#1| 1) .cse3 (< .cse4 (* 2 |ULTIMATE.start_main_~d~0#1|))))))) [2021-12-17 12:42:37,552 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (let ((.cse7 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse4 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse5 (* .cse7 |ULTIMATE.start_main_~p~0#1|))) (let ((.cse0 (<= 1 .cse7)) (.cse6 (* .cse7 |ULTIMATE.start_main_~q~0#1|)) (.cse1 (= (+ (* 4294967296 (div |ULTIMATE.start_main_~A~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_main_~d~0#1| .cse5)) (.cse3 (<= .cse4 2))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~q~0#1| 0) .cse2 .cse3) (and .cse0 (<= (div (* |ULTIMATE.start_main_~d~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~r~0#1|) .cse1 (= (+ .cse4 |ULTIMATE.start_main_~d~0#1|) (+ |ULTIMATE.start_main_~r~0#1| .cse5 .cse6)) (<= .cse7 (div (div |ULTIMATE.start_main_~d~0#1| 2) 2)) .cse2 .cse3) (and .cse0 (= .cse4 (+ |ULTIMATE.start_main_~r~0#1| .cse6)) .cse1 (<= .cse7 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 2 .cse7))))))) [2021-12-17 12:42:37,552 INFO L861 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2021-12-17 12:42:37,552 INFO L858 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2021-12-17 12:42:37,552 INFO L854 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (let ((.cse9 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse4 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse17 (* .cse9 |ULTIMATE.start_main_~p~0#1|)) (.cse16 (* .cse9 |ULTIMATE.start_main_~q~0#1|))) (let ((.cse5 (= |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse8 (* |ULTIMATE.start_main_~d~0#1| (- 1))) (.cse11 (< |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse10 (= (+ .cse4 |ULTIMATE.start_main_~d~0#1|) (+ |ULTIMATE.start_main_~r~0#1| .cse17 .cse16))) (.cse3 (= |ULTIMATE.start_main_~d~0#1| .cse17)) (.cse0 (= .cse4 (+ |ULTIMATE.start_main_~r~0#1| .cse16))) (.cse1 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse6 (<= 0 |ULTIMATE.start_main_~r~0#1|)) (.cse12 (<= .cse4 2))) (or (and .cse0 .cse1 .cse2 .cse3) (let ((.cse7 (* |ULTIMATE.start_main_~r~0#1| (- 1)))) (and (= (+ |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~d~0#1|) .cse4) .cse5 (<= 1 (div |ULTIMATE.start_main_~p~0#1| 2)) .cse6 (< (div (div (+ .cse7 .cse8 (- 1)) 2) (- 2)) (+ .cse9 1)) (< (div (+ .cse7 .cse8 2) (- 4294967296)) 1) .cse3)) (and (<= |ULTIMATE.start_main_~d~0#1| .cse4) .cse0 .cse5 .cse1 .cse10 (< .cse4 (* 2 |ULTIMATE.start_main_~d~0#1|))) (and .cse0 .cse11 (<= .cse9 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 2 .cse9))) (and (<= (div .cse8 (- 2)) |ULTIMATE.start_main_~r~0#1|) .cse11 .cse2 .cse10 (<= .cse9 (div (div |ULTIMATE.start_main_~d~0#1| 2) 2)) .cse3 .cse12) (and (= |ULTIMATE.start_main_~q~0#1| 2) .cse0 (= |ULTIMATE.start_main_~d~0#1| .cse9) .cse1 .cse6 .cse12 (let ((.cse15 (+ .cse9 (- 1)))) (< (let ((.cse14 (* (div (+ |ULTIMATE.start_main_~d~0#1| 1) (- 2)) (- 1)))) (let ((.cse13 (div (+ .cse9 .cse14 1) 2))) (+ (div (+ (* (div (+ (* .cse9 (- 1)) (- 1)) (- 2)) (- 1)) .cse13) (- 1073741824)) (div (+ .cse9 .cse14 (- 1)) (- 2147483648)) (div (+ .cse13 (- 1)) (- 1073741824)) (div .cse15 (- 1073741824))))) (+ (div .cse15 1073741824) 1)))))))) [2021-12-17 12:42:37,553 INFO L854 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (let ((.cse9 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse16 (* .cse9 |ULTIMATE.start_main_~p~0#1|)) (.cse4 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse17 (* .cse9 |ULTIMATE.start_main_~q~0#1|))) (let ((.cse6 (<= 0 |ULTIMATE.start_main_~r~0#1|)) (.cse5 (= |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse0 (= .cse4 (+ |ULTIMATE.start_main_~r~0#1| .cse17))) (.cse8 (* |ULTIMATE.start_main_~d~0#1| (- 1))) (.cse15 (< |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse14 (= (+ .cse4 |ULTIMATE.start_main_~d~0#1|) (+ |ULTIMATE.start_main_~r~0#1| .cse16 .cse17))) (.cse3 (= |ULTIMATE.start_main_~d~0#1| .cse16)) (.cse10 (<= .cse4 2))) (or (and .cse0 .cse1 .cse2 .cse3) (let ((.cse7 (* |ULTIMATE.start_main_~r~0#1| (- 1)))) (and (= (+ |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~d~0#1|) .cse4) .cse5 (<= 1 (div |ULTIMATE.start_main_~p~0#1| 2)) .cse6 (< (div (div (+ .cse7 .cse8 (- 1)) 2) (- 2)) (+ .cse9 1)) (< (div (+ .cse7 .cse8 2) (- 4294967296)) 1) .cse3)) (and .cse0 (= |ULTIMATE.start_main_~q~0#1| 2) (= |ULTIMATE.start_main_~d~0#1| .cse9) .cse1 .cse6 .cse10 (let ((.cse13 (+ .cse9 (- 1)))) (< (let ((.cse12 (* (div (+ |ULTIMATE.start_main_~d~0#1| 1) (- 2)) (- 1)))) (let ((.cse11 (div (+ .cse9 .cse12 1) 2))) (+ (div (+ (* (div (+ (* .cse9 (- 1)) (- 1)) (- 2)) (- 1)) .cse11) (- 1073741824)) (div (+ .cse9 .cse12 (- 1)) (- 2147483648)) (div (+ .cse11 (- 1)) (- 1073741824)) (div .cse13 (- 1073741824))))) (+ (div .cse13 1073741824) 1)))) (and (<= |ULTIMATE.start_main_~d~0#1| .cse4) .cse0 .cse5 .cse1 .cse14 (< .cse4 (* 2 |ULTIMATE.start_main_~d~0#1|))) (and .cse0 .cse15 (<= .cse9 |ULTIMATE.start_main_~r~0#1|) .cse2 .cse3 (= |ULTIMATE.start_main_~d~0#1| (* 2 .cse9))) (and (<= (div .cse8 (- 2)) |ULTIMATE.start_main_~r~0#1|) .cse15 .cse2 .cse14 (<= .cse9 (div (div |ULTIMATE.start_main_~d~0#1| 2) 2)) .cse3 .cse10))))) [2021-12-17 12:42:37,553 INFO L858 garLoopResultBuilder]: For program point L39(lines 36 44) no Hoare annotation was computed. [2021-12-17 12:42:37,553 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-12-17 12:42:37,553 INFO L858 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-12-17 12:42:37,553 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-12-17 12:42:37,553 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-12-17 12:42:37,553 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-12-17 12:42:37,553 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-12-17 12:42:37,553 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-12-17 12:42:37,553 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-12-17 12:42:37,553 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-12-17 12:42:37,553 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-12-17 12:42:37,555 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:42:37,556 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 12:42:37,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 12:42:37 BoogieIcfgContainer [2021-12-17 12:42:37,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 12:42:37,574 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 12:42:37,574 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 12:42:37,574 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 12:42:37,575 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:36:03" (3/4) ... [2021-12-17 12:42:37,577 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 12:42:37,580 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-17 12:42:37,580 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-17 12:42:37,583 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-17 12:42:37,583 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 12:42:37,583 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 12:42:37,584 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 12:42:37,613 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 12:42:37,613 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 12:42:37,613 INFO L158 Benchmark]: Toolchain (without parser) took 394161.65ms. Allocated memory was 88.1MB in the beginning and 394.3MB in the end (delta: 306.2MB). Free memory was 56.0MB in the beginning and 336.1MB in the end (delta: -280.1MB). Peak memory consumption was 26.1MB. Max. memory is 16.1GB. [2021-12-17 12:42:37,613 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 88.1MB. Free memory was 62.4MB in the beginning and 62.4MB in the end (delta: 24.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 12:42:37,614 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.81ms. Allocated memory is still 88.1MB. Free memory was 55.8MB in the beginning and 65.8MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 12:42:37,614 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.96ms. Allocated memory is still 88.1MB. Free memory was 65.8MB in the beginning and 64.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 12:42:37,614 INFO L158 Benchmark]: Boogie Preprocessor took 12.59ms. Allocated memory is still 88.1MB. Free memory was 64.0MB in the beginning and 63.2MB in the end (delta: 786.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 12:42:37,614 INFO L158 Benchmark]: RCFGBuilder took 168.90ms. Allocated memory is still 88.1MB. Free memory was 63.2MB in the beginning and 53.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 12:42:37,614 INFO L158 Benchmark]: TraceAbstraction took 393743.19ms. Allocated memory was 88.1MB in the beginning and 394.3MB in the end (delta: 306.2MB). Free memory was 52.8MB in the beginning and 339.3MB in the end (delta: -286.4MB). Peak memory consumption was 230.3MB. Max. memory is 16.1GB. [2021-12-17 12:42:37,614 INFO L158 Benchmark]: Witness Printer took 38.84ms. Allocated memory is still 394.3MB. Free memory was 339.3MB in the beginning and 336.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 12:42:37,615 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 88.1MB. Free memory was 62.4MB in the beginning and 62.4MB in the end (delta: 24.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 174.81ms. Allocated memory is still 88.1MB. Free memory was 55.8MB in the beginning and 65.8MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.96ms. Allocated memory is still 88.1MB. Free memory was 65.8MB in the beginning and 64.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.59ms. Allocated memory is still 88.1MB. Free memory was 64.0MB in the beginning and 63.2MB in the end (delta: 786.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 168.90ms. Allocated memory is still 88.1MB. Free memory was 63.2MB in the beginning and 53.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 393743.19ms. Allocated memory was 88.1MB in the beginning and 394.3MB in the end (delta: 306.2MB). Free memory was 52.8MB in the beginning and 339.3MB in the end (delta: -286.4MB). Peak memory consumption was 230.3MB. Max. memory is 16.1GB. * Witness Printer took 38.84ms. Allocated memory is still 394.3MB. Free memory was 339.3MB in the beginning and 336.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 393.7s, OverallIterations: 14, TraceHistogramMax: 15, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 19.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 7.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 297 SdHoareTripleChecker+Valid, 7.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 260 mSDsluCounter, 2867 SdHoareTripleChecker+Invalid, 7.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13 IncrementalHoareTripleChecker+Unchecked, 2297 mSDsCounter, 440 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1837 IncrementalHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 440 mSolverCounterUnsat, 570 mSDtfsCounter, 1837 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1478 GetRequests, 1305 SyntacticMatches, 16 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 38.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=8, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 52 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 96 PreInvPairs, 129 NumberOfFragments, 1457 HoareAnnotationTreeSize, 96 FomulaSimplifications, 538 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 3813 FormulaSimplificationTreeSizeReductionInter, 7.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 363.4s InterpolantComputationTime, 877 NumberOfCodeBlocks, 850 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1478 ConstructedInterpolants, 2 QuantifiedInterpolants, 20123 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1780 ConjunctsInSsa, 185 ConjunctsInUnsatCore, 22 InterpolantComputations, 8 PerfectInterpolantSequences, 3736/3949 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((1 <= B % 4294967296 && 4294967296 * (A / 4294967296) + r == A) && p == 1) && q == 0) && d == B % 4294967296 * p) && A % 4294967296 <= 2) || ((((((1 <= B % 4294967296 && d * -1 / -2 <= r) && 4294967296 * (A / 4294967296) + r == A) && A % 4294967296 + d == r + B % 4294967296 * p + B % 4294967296 * q) && B % 4294967296 <= d / 2 / 2) && d == B % 4294967296 * p) && A % 4294967296 <= 2)) || ((((((1 <= B % 4294967296 && A % 4294967296 == r + B % 4294967296 * q) && 4294967296 * (A / 4294967296) + r == A) && B % 4294967296 <= r) && d == B % 4294967296 * p) && A % 4294967296 <= 2) && d == 2 * (B % 4294967296)) RESULT: Ultimate proved your program to be correct! [2021-12-17 12:42:37,842 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-12-17 12:42:37,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE