./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/hard2_valuebound5.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 a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 16:12:01,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 16:12:01,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 16:12:01,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 16:12:01,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 16:12:01,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 16:12:01,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 16:12:01,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 16:12:01,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 16:12:01,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 16:12:01,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 16:12:01,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 16:12:01,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 16:12:01,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 16:12:01,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 16:12:01,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 16:12:01,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 16:12:01,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 16:12:01,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 16:12:01,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 16:12:01,819 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 16:12:01,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 16:12:01,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 16:12:01,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 16:12:01,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 16:12:01,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 16:12:01,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 16:12:01,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 16:12:01,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 16:12:01,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 16:12:01,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 16:12:01,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 16:12:01,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 16:12:01,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 16:12:01,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 16:12:01,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 16:12:01,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 16:12:01,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 16:12:01,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 16:12:01,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 16:12:01,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 16:12:01,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 16:12:01,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 16:12:01,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 16:12:01,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 16:12:01,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 16:12:01,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 16:12:01,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 16:12:01,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 16:12:01,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 16:12:01,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 16:12:01,851 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 16:12:01,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 16:12:01,852 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 16:12:01,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 16:12:01,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 16:12:01,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 16:12:01,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 16:12:01,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 16:12:01,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 16:12:01,853 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 16:12:01,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 16:12:01,853 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 16:12:01,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 16:12:01,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 16:12:01,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 16:12:01,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 16:12:01,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:12:01,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 16:12:01,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 16:12:01,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 16:12:01,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 16:12:01,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 16:12:01,855 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 16:12:01,855 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 16:12:01,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 16:12:01,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 [2022-07-19 16:12:02,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 16:12:02,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 16:12:02,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 16:12:02,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 16:12:02,047 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 16:12:02,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2022-07-19 16:12:02,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26cf76d72/a6aa0923cda14b8b8745394ef953ab3d/FLAG056dbfc34 [2022-07-19 16:12:02,458 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 16:12:02,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2022-07-19 16:12:02,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26cf76d72/a6aa0923cda14b8b8745394ef953ab3d/FLAG056dbfc34 [2022-07-19 16:12:02,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26cf76d72/a6aa0923cda14b8b8745394ef953ab3d [2022-07-19 16:12:02,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 16:12:02,478 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 16:12:02,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 16:12:02,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 16:12:02,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 16:12:02,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae484a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02, skipping insertion in model container [2022-07-19 16:12:02,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 16:12:02,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 16:12:02,607 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/hard2_valuebound5.c[526,539] [2022-07-19 16:12:02,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:12:02,629 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 16:12:02,640 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/hard2_valuebound5.c[526,539] [2022-07-19 16:12:02,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:12:02,665 INFO L208 MainTranslator]: Completed translation [2022-07-19 16:12:02,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02 WrapperNode [2022-07-19 16:12:02,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 16:12:02,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 16:12:02,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 16:12:02,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 16:12:02,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,692 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2022-07-19 16:12:02,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 16:12:02,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 16:12:02,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 16:12:02,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 16:12:02,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 16:12:02,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 16:12:02,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 16:12:02,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 16:12:02,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02" (1/1) ... [2022-07-19 16:12:02,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:12:02,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:12:02,753 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 16:12:02,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 16:12:02,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 16:12:02,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 16:12:02,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 16:12:02,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 16:12:02,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 16:12:02,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 16:12:02,834 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 16:12:02,835 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 16:12:02,927 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 16:12:02,931 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 16:12:02,931 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 16:12:02,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:12:02 BoogieIcfgContainer [2022-07-19 16:12:02,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 16:12:02,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 16:12:02,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 16:12:02,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 16:12:02,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 04:12:02" (1/3) ... [2022-07-19 16:12:02,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdefa9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:12:02, skipping insertion in model container [2022-07-19 16:12:02,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:12:02" (2/3) ... [2022-07-19 16:12:02,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdefa9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:12:02, skipping insertion in model container [2022-07-19 16:12:02,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:12:02" (3/3) ... [2022-07-19 16:12:02,939 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.c [2022-07-19 16:12:02,948 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 16:12:02,948 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 16:12:02,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 16:12:02,982 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7cbc7317, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6d337a65 [2022-07-19 16:12:02,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 16:12:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 16:12:02,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 16:12:02,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:12:02,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:12:02,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:12:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:12:02,999 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2022-07-19 16:12:03,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:12:03,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511918804] [2022-07-19 16:12:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:03,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:12:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:12:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:12:03,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:12:03,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511918804] [2022-07-19 16:12:03,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511918804] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:12:03,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:12:03,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 16:12:03,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297621277] [2022-07-19 16:12:03,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:12:03,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 16:12:03,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:12:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 16:12:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 16:12:03,109 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 16:12:03,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:12:03,122 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2022-07-19 16:12:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 16:12:03,124 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-19 16:12:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:12:03,128 INFO L225 Difference]: With dead ends: 49 [2022-07-19 16:12:03,129 INFO L226 Difference]: Without dead ends: 22 [2022-07-19 16:12:03,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 16:12:03,133 INFO L413 NwaCegarLoop]: 34 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, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:12:03,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:12:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-19 16:12:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-19 16:12:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 16:12:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-07-19 16:12:03,158 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2022-07-19 16:12:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:12:03,159 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-07-19 16:12:03,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 16:12:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-07-19 16:12:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 16:12:03,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:12:03,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:12:03,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 16:12:03,161 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:12:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:12:03,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2022-07-19 16:12:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:12:03,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105923750] [2022-07-19 16:12:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:03,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:12:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:12:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:12:03,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:12:03,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105923750] [2022-07-19 16:12:03,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105923750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:12:03,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:12:03,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:12:03,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381401512] [2022-07-19 16:12:03,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:12:03,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:12:03,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:12:03,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:12:03,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:12:03,227 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 16:12:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:12:03,266 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-07-19 16:12:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 16:12:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-19 16:12:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:12:03,268 INFO L225 Difference]: With dead ends: 35 [2022-07-19 16:12:03,268 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 16:12:03,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:12:03,269 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:12:03,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:12:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 16:12:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-07-19 16:12:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 16:12:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-07-19 16:12:03,276 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2022-07-19 16:12:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:12:03,276 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-07-19 16:12:03,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 16:12:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-07-19 16:12:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 16:12:03,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:12:03,277 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:12:03,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 16:12:03,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:12:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:12:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2022-07-19 16:12:03,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:12:03,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237278364] [2022-07-19 16:12:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:03,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:12:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:12:03,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-19 16:12:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:12:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:12:03,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:12:03,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237278364] [2022-07-19 16:12:03,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237278364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:12:03,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:12:03,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:12:03,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988444066] [2022-07-19 16:12:03,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:12:03,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:12:03,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:12:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:12:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:12:03,350 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 16:12:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:12:03,436 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-07-19 16:12:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 16:12:03,436 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-19 16:12:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:12:03,439 INFO L225 Difference]: With dead ends: 39 [2022-07-19 16:12:03,439 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 16:12:03,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:12:03,442 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:12:03,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 88 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:12:03,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 16:12:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-07-19 16:12:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 16:12:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-07-19 16:12:03,452 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2022-07-19 16:12:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:12:03,453 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-07-19 16:12:03,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 16:12:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-07-19 16:12:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 16:12:03,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:12:03,455 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:12:03,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 16:12:03,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:12:03,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:12:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2022-07-19 16:12:03,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:12:03,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006546107] [2022-07-19 16:12:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:03,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:12:03,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:12:03,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958450289] [2022-07-19 16:12:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:03,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:03,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:12:03,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:12:03,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 16:12:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:12:03,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 16:12:03,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:12:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 16:12:03,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:12:03,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:12:03,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006546107] [2022-07-19 16:12:03,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:12:03,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958450289] [2022-07-19 16:12:03,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958450289] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:12:03,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:12:03,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:12:03,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363232542] [2022-07-19 16:12:03,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:12:03,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:12:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:12:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:12:03,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:12:03,633 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 16:12:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:12:03,697 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-07-19 16:12:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:12:03,698 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), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-19 16:12:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:12:03,699 INFO L225 Difference]: With dead ends: 58 [2022-07-19 16:12:03,699 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 16:12:03,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:12:03,700 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:12:03,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:12:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 16:12:03,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-19 16:12:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 16:12:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2022-07-19 16:12:03,707 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 19 [2022-07-19 16:12:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:12:03,707 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2022-07-19 16:12:03,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 16:12:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2022-07-19 16:12:03,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 16:12:03,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:12:03,708 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:12:03,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 16:12:03,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:03,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:12:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:12:03,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2022-07-19 16:12:03,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:12:03,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268911819] [2022-07-19 16:12:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:03,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:12:03,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:12:03,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853412794] [2022-07-19 16:12:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:03,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:12:03,949 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:12:03,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 16:12:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:12:03,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 16:12:03,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:12:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 16:12:04,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:12:04,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:12:04,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268911819] [2022-07-19 16:12:04,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:12:04,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853412794] [2022-07-19 16:12:04,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853412794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:12:04,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:12:04,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:12:04,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601475854] [2022-07-19 16:12:04,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:12:04,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:12:04,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:12:04,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:12:04,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:12:04,035 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 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) [2022-07-19 16:12:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:12:04,077 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-07-19 16:12:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:12:04,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 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 26 [2022-07-19 16:12:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:12:04,078 INFO L225 Difference]: With dead ends: 57 [2022-07-19 16:12:04,078 INFO L226 Difference]: Without dead ends: 50 [2022-07-19 16:12:04,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:12:04,079 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:12:04,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 66 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:12:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-19 16:12:04,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-07-19 16:12:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 16:12:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-19 16:12:04,086 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 26 [2022-07-19 16:12:04,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:12:04,086 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-19 16:12:04,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 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) [2022-07-19 16:12:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-19 16:12:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 16:12:04,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:12:04,087 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:12:04,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 16:12:04,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:04,301 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:12:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:12:04,301 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2022-07-19 16:12:04,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:12:04,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514405267] [2022-07-19 16:12:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:04,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:12:04,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:12:04,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809009890] [2022-07-19 16:12:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:04,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:04,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:12:04,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:12:04,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 16:12:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:12:04,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 16:12:04,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:12:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 16:12:04,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:12:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 16:12:04,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:12:04,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514405267] [2022-07-19 16:12:04,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:12:04,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809009890] [2022-07-19 16:12:04,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809009890] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 16:12:04,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:12:04,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-19 16:12:04,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36358125] [2022-07-19 16:12:04,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:12:04,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:12:04,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:12:04,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:12:04,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 16:12:04,496 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 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) [2022-07-19 16:12:04,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:12:04,664 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2022-07-19 16:12:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:12:04,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 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 36 [2022-07-19 16:12:04,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:12:04,666 INFO L225 Difference]: With dead ends: 61 [2022-07-19 16:12:04,666 INFO L226 Difference]: Without dead ends: 59 [2022-07-19 16:12:04,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 16:12:04,667 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 16:12:04,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 80 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 16:12:04,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-19 16:12:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-07-19 16:12:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 16:12:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-07-19 16:12:04,682 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 36 [2022-07-19 16:12:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:12:04,683 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-07-19 16:12:04,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 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) [2022-07-19 16:12:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-07-19 16:12:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 16:12:04,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:12:04,686 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:12:04,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 16:12:04,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:04,891 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:12:04,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:12:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2022-07-19 16:12:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:12:04,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933951768] [2022-07-19 16:12:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:12:04,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:12:04,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779958140] [2022-07-19 16:12:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:04,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:04,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:12:04,902 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:12:04,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 16:12:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:12:04,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 16:12:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:12:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 16:12:05,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:12:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 16:12:05,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:12:05,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933951768] [2022-07-19 16:12:05,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:12:05,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779958140] [2022-07-19 16:12:05,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779958140] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:12:05,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:12:05,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-19 16:12:05,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575188858] [2022-07-19 16:12:05,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:12:05,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 16:12:05,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:12:05,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 16:12:05,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-19 16:12:05,735 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-19 16:12:11,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:12:11,063 INFO L93 Difference]: Finished difference Result 146 states and 202 transitions. [2022-07-19 16:12:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 16:12:11,066 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2022-07-19 16:12:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:12:11,067 INFO L225 Difference]: With dead ends: 146 [2022-07-19 16:12:11,068 INFO L226 Difference]: Without dead ends: 117 [2022-07-19 16:12:11,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-19 16:12:11,068 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 16:12:11,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 138 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 16:12:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-19 16:12:11,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2022-07-19 16:12:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 64 states have (on average 1.234375) internal successors, (79), 68 states have internal predecessors, (79), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-19 16:12:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2022-07-19 16:12:11,093 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 56 [2022-07-19 16:12:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:12:11,093 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2022-07-19 16:12:11,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-19 16:12:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2022-07-19 16:12:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 16:12:11,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:12:11,094 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:12:11,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 16:12:11,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:11,312 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:12:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:12:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2022-07-19 16:12:11,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:12:11,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331191552] [2022-07-19 16:12:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:11,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:12:11,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:12:11,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386781566] [2022-07-19 16:12:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:11,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:11,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:12:11,326 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:12:11,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 16:12:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:12:11,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 16:12:11,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:12:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-19 16:12:11,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:12:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-19 16:12:11,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:12:11,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331191552] [2022-07-19 16:12:11,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:12:11,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386781566] [2022-07-19 16:12:11,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386781566] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:12:11,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:12:11,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-07-19 16:12:11,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268795630] [2022-07-19 16:12:11,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:12:11,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 16:12:11,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:12:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 16:12:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-19 16:12:11,779 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-19 16:12:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:12:12,190 INFO L93 Difference]: Finished difference Result 161 states and 211 transitions. [2022-07-19 16:12:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 16:12:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 67 [2022-07-19 16:12:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:12:12,192 INFO L225 Difference]: With dead ends: 161 [2022-07-19 16:12:12,192 INFO L226 Difference]: Without dead ends: 107 [2022-07-19 16:12:12,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-07-19 16:12:12,193 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 16:12:12,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 129 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 16:12:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-19 16:12:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2022-07-19 16:12:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 61 states have internal predecessors, (68), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-19 16:12:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2022-07-19 16:12:12,219 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 67 [2022-07-19 16:12:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:12:12,220 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2022-07-19 16:12:12,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-19 16:12:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2022-07-19 16:12:12,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-19 16:12:12,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:12:12,222 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:12:12,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 16:12:12,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:12,436 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:12:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:12:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1842513023, now seen corresponding path program 1 times [2022-07-19 16:12:12,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:12:12,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119790169] [2022-07-19 16:12:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:12,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:12:12,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:12:12,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126395625] [2022-07-19 16:12:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:12,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:12,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:12:12,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:12:12,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 16:12:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:12:12,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 16:12:12,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:12:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-19 16:12:12,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:12:12,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:12:12,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119790169] [2022-07-19 16:12:12,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:12:12,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126395625] [2022-07-19 16:12:12,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126395625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:12:12,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:12:12,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:12:12,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495573568] [2022-07-19 16:12:12,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:12:12,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:12:12,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:12:12,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:12:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:12:12,594 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 16:12:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:12:12,638 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2022-07-19 16:12:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:12:12,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2022-07-19 16:12:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:12:12,639 INFO L225 Difference]: With dead ends: 107 [2022-07-19 16:12:12,639 INFO L226 Difference]: Without dead ends: 95 [2022-07-19 16:12:12,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:12:12,640 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:12:12,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:12:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-19 16:12:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-19 16:12:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 60 states have (on average 1.15) internal successors, (69), 61 states have internal predecessors, (69), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-19 16:12:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2022-07-19 16:12:12,659 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 76 [2022-07-19 16:12:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:12:12,660 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2022-07-19 16:12:12,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 16:12:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2022-07-19 16:12:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-19 16:12:12,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:12:12,661 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:12:12,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 16:12:12,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:12,878 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:12:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:12:12,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1412721000, now seen corresponding path program 1 times [2022-07-19 16:12:12,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:12:12,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920648939] [2022-07-19 16:12:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:12,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:12:12,885 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:12:12,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721667456] [2022-07-19 16:12:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:12,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:12,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:12:12,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:12:12,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 16:12:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:12:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 16:12:12,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:12:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-07-19 16:12:13,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:12:13,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:12:13,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920648939] [2022-07-19 16:12:13,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:12:13,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721667456] [2022-07-19 16:12:13,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721667456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:12:13,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:12:13,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 16:12:13,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927220872] [2022-07-19 16:12:13,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:12:13,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 16:12:13,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:12:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 16:12:13,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:12:13,038 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-19 16:12:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:12:13,206 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2022-07-19 16:12:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 16:12:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-07-19 16:12:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:12:13,207 INFO L225 Difference]: With dead ends: 131 [2022-07-19 16:12:13,207 INFO L226 Difference]: Without dead ends: 97 [2022-07-19 16:12:13,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-19 16:12:13,208 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:12:13,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 88 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:12:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-19 16:12:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2022-07-19 16:12:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 56 states have internal predecessors, (61), 19 states have call successors, (19), 11 states have call predecessors, (19), 11 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-19 16:12:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-07-19 16:12:13,216 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 86 [2022-07-19 16:12:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:12:13,217 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-07-19 16:12:13,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-19 16:12:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-07-19 16:12:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-19 16:12:13,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:12:13,218 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:12:13,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 16:12:13,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:13,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:12:13,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:12:13,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 2 times [2022-07-19 16:12:13,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:12:13,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257813554] [2022-07-19 16:12:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:12:13,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:12:13,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:12:13,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715323091] [2022-07-19 16:12:13,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:12:13,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:12:13,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:12:13,443 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:12:13,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 16:12:13,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:12:13,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:12:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 16:12:13,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:12:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-19 16:12:13,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:12:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-19 16:12:28,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:12:28,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257813554] [2022-07-19 16:12:28,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:12:28,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715323091] [2022-07-19 16:12:28,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715323091] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:12:28,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:12:28,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-07-19 16:12:28,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815161451] [2022-07-19 16:12:28,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:12:28,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 16:12:28,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:12:28,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 16:12:28,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-07-19 16:12:28,676 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-19 16:13:00,972 WARN L233 SmtUtils]: Spent 31.49s on a formula simplification. DAG size of input: 229 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 16:13:02,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:13:11,444 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 82 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 16:13:21,921 WARN L233 SmtUtils]: Spent 10.16s on a formula simplification. DAG size of input: 107 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 16:13:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:13:26,233 INFO L93 Difference]: Finished difference Result 214 states and 281 transitions. [2022-07-19 16:13:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 16:13:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 86 [2022-07-19 16:13:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:13:26,235 INFO L225 Difference]: With dead ends: 214 [2022-07-19 16:13:26,235 INFO L226 Difference]: Without dead ends: 178 [2022-07-19 16:13:26,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2022-07-19 16:13:26,237 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 109 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-07-19 16:13:26,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 247 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-07-19 16:13:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-19 16:13:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2022-07-19 16:13:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 91 states have (on average 1.1758241758241759) internal successors, (107), 92 states have internal predecessors, (107), 34 states have call successors, (34), 16 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-19 16:13:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 174 transitions. [2022-07-19 16:13:26,262 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 174 transitions. Word has length 86 [2022-07-19 16:13:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:13:26,262 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 174 transitions. [2022-07-19 16:13:26,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-19 16:13:26,262 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 174 transitions. [2022-07-19 16:13:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 16:13:26,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:13:26,263 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:13:26,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 16:13:26,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 16:13:26,479 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:13:26,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:13:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash 672233719, now seen corresponding path program 3 times [2022-07-19 16:13:26,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:13:26,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395425906] [2022-07-19 16:13:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:13:26,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:13:26,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:13:26,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463701664] [2022-07-19 16:13:26,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 16:13:26,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:13:26,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:13:26,497 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:13:26,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 16:13:26,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 16:13:26,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:13:26,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 16:13:26,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:13:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 71 proven. 4 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-19 16:13:26,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:13:33,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:13:33,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395425906] [2022-07-19 16:13:33,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:13:33,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463701664] [2022-07-19 16:13:33,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463701664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:13:33,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:13:33,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-07-19 16:13:33,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112983375] [2022-07-19 16:13:33,247 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:13:33,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 16:13:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:13:33,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 16:13:33,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-19 16:13:33,248 INFO L87 Difference]: Start difference. First operand 142 states and 174 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 16:13:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:13:33,391 INFO L93 Difference]: Finished difference Result 152 states and 182 transitions. [2022-07-19 16:13:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 16:13:33,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2022-07-19 16:13:33,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:13:33,392 INFO L225 Difference]: With dead ends: 152 [2022-07-19 16:13:33,392 INFO L226 Difference]: Without dead ends: 150 [2022-07-19 16:13:33,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-19 16:13:33,393 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:13:33,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 49 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:13:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-19 16:13:33,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-07-19 16:13:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 98 states have internal predecessors, (113), 34 states have call successors, (34), 18 states have call predecessors, (34), 18 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-19 16:13:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 180 transitions. [2022-07-19 16:13:33,411 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 180 transitions. Word has length 91 [2022-07-19 16:13:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:13:33,412 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 180 transitions. [2022-07-19 16:13:33,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 16:13:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 180 transitions. [2022-07-19 16:13:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-19 16:13:33,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:13:33,413 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 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] [2022-07-19 16:13:33,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 16:13:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:13:33,628 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:13:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:13:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1149721345, now seen corresponding path program 1 times [2022-07-19 16:13:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:13:33,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997360664] [2022-07-19 16:13:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:13:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:13:33,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:13:33,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208165490] [2022-07-19 16:13:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:13:33,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:13:33,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:13:33,638 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:13:33,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 16:13:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:13:33,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 16:13:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:13:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-19 16:13:33,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:13:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-19 16:13:34,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:13:34,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997360664] [2022-07-19 16:13:34,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:13:34,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208165490] [2022-07-19 16:13:34,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208165490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:13:34,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:13:34,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-19 16:13:34,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111545047] [2022-07-19 16:13:34,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:13:34,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 16:13:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:13:34,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 16:13:34,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-19 16:13:34,294 INFO L87 Difference]: Start difference. First operand 150 states and 180 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-07-19 16:13:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:13:34,604 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2022-07-19 16:13:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 16:13:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 102 [2022-07-19 16:13:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:13:34,605 INFO L225 Difference]: With dead ends: 158 [2022-07-19 16:13:34,605 INFO L226 Difference]: Without dead ends: 150 [2022-07-19 16:13:34,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 190 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-19 16:13:34,606 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 16:13:34,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 264 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 16:13:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-19 16:13:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-07-19 16:13:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 98 states have internal predecessors, (112), 34 states have call successors, (34), 18 states have call predecessors, (34), 18 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-19 16:13:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 179 transitions. [2022-07-19 16:13:34,623 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 179 transitions. Word has length 102 [2022-07-19 16:13:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:13:34,624 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 179 transitions. [2022-07-19 16:13:34,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-07-19 16:13:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 179 transitions. [2022-07-19 16:13:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-19 16:13:34,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:13:34,625 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:13:34,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 16:13:34,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 16:13:34,827 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:13:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:13:34,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1393289704, now seen corresponding path program 2 times [2022-07-19 16:13:34,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:13:34,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47238962] [2022-07-19 16:13:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:13:34,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:13:34,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:13:34,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936172959] [2022-07-19 16:13:34,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:13:34,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:13:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:13:34,835 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:13:34,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 16:13:34,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:13:34,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:13:34,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 16:13:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:13:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 172 proven. 28 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-07-19 16:13:34,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:13:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 56 proven. 28 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2022-07-19 16:13:35,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:13:35,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47238962] [2022-07-19 16:13:35,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:13:35,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936172959] [2022-07-19 16:13:35,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936172959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:13:35,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:13:35,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-07-19 16:13:35,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004577857] [2022-07-19 16:13:35,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:13:35,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 16:13:35,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:13:35,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 16:13:35,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 16:13:35,090 INFO L87 Difference]: Start difference. First operand 150 states and 179 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 6 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2022-07-19 16:13:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:13:35,155 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2022-07-19 16:13:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:13:35,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 6 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 112 [2022-07-19 16:13:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:13:35,157 INFO L225 Difference]: With dead ends: 180 [2022-07-19 16:13:35,157 INFO L226 Difference]: Without dead ends: 121 [2022-07-19 16:13:35,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 16:13:35,157 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:13:35,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 174 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:13:35,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-19 16:13:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-19 16:13:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 80 states have internal predecessors, (88), 24 states have call successors, (24), 17 states have call predecessors, (24), 17 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-19 16:13:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2022-07-19 16:13:35,170 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 112 [2022-07-19 16:13:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:13:35,171 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2022-07-19 16:13:35,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 6 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2022-07-19 16:13:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2022-07-19 16:13:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-19 16:13:35,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:13:35,172 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:13:35,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 16:13:35,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 16:13:35,390 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:13:35,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:13:35,390 INFO L85 PathProgramCache]: Analyzing trace with hash 289773103, now seen corresponding path program 3 times [2022-07-19 16:13:35,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:13:35,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142323542] [2022-07-19 16:13:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:13:35,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:13:35,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:13:35,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384949739] [2022-07-19 16:13:35,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 16:13:35,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:13:35,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:13:35,398 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:13:35,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 16:13:35,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 16:13:35,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:13:35,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 16:13:35,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:13:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 144 proven. 4 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-07-19 16:13:37,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:14:02,961 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 16:14:15,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:14:15,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142323542] [2022-07-19 16:14:15,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:14:15,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384949739] [2022-07-19 16:14:15,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384949739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:14:15,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:14:15,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-19 16:14:15,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338674420] [2022-07-19 16:14:15,361 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:14:15,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 16:14:15,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:14:15,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 16:14:15,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=293, Unknown=3, NotChecked=0, Total=380 [2022-07-19 16:14:15,362 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 16:14:17,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:14:17,613 INFO L93 Difference]: Finished difference Result 162 states and 188 transitions. [2022-07-19 16:14:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 16:14:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 116 [2022-07-19 16:14:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:14:17,614 INFO L225 Difference]: With dead ends: 162 [2022-07-19 16:14:17,614 INFO L226 Difference]: Without dead ends: 160 [2022-07-19 16:14:17,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=111, Invalid=391, Unknown=4, NotChecked=0, Total=506 [2022-07-19 16:14:17,615 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:14:17,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 124 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 154 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-07-19 16:14:17,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-19 16:14:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2022-07-19 16:14:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 106 states have internal predecessors, (114), 35 states have call successors, (35), 21 states have call predecessors, (35), 21 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-19 16:14:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2022-07-19 16:14:17,635 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 116 [2022-07-19 16:14:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:14:17,635 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2022-07-19 16:14:17,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 16:14:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2022-07-19 16:14:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-19 16:14:17,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:14:17,636 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:14:17,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 16:14:17,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 16:14:17,846 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:14:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:14:17,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1978716845, now seen corresponding path program 4 times [2022-07-19 16:14:17,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:14:17,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817428371] [2022-07-19 16:14:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:14:17,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:14:17,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:14:17,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940362829] [2022-07-19 16:14:17,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 16:14:17,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:14:17,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:14:17,856 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:14:17,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 16:14:17,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 16:14:17,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:14:17,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-19 16:14:17,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:14:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-07-19 16:14:18,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:14:57,207 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 433 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)