./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_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 ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 12:02:37,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 12:02:37,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 12:02:37,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 12:02:37,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 12:02:37,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 12:02:37,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 12:02:37,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 12:02:37,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 12:02:37,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 12:02:37,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 12:02:37,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 12:02:37,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 12:02:37,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 12:02:37,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 12:02:37,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 12:02:37,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 12:02:37,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 12:02:37,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 12:02:37,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 12:02:37,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 12:02:37,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 12:02:37,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 12:02:37,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 12:02:37,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 12:02:37,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 12:02:37,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 12:02:37,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 12:02:37,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 12:02:37,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 12:02:37,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 12:02:37,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 12:02:37,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 12:02:37,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 12:02:37,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 12:02:37,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 12:02:37,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 12:02:37,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 12:02:37,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 12:02:37,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 12:02:37,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 12:02:37,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 12:02:37,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 12:02:37,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 12:02:37,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 12:02:37,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 12:02:37,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 12:02:37,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 12:02:37,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 12:02:37,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 12:02:37,759 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 12:02:37,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 12:02:37,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 12:02:37,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 12:02:37,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 12:02:37,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 12:02:37,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 12:02:37,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 12:02:37,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 12:02:37,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 12:02:37,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 12:02:37,761 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 12:02:37,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 12:02:37,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 12:02:37,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 12:02:37,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 12:02:37,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 12:02:37,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 12:02:37,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 12:02:37,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 12:02:37,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 12:02:37,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 12:02:37,764 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 12:02:37,764 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 12:02:37,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 12:02:37,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 12:02:37,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 [2021-12-17 12:02:37,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 12:02:38,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 12:02:38,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 12:02:38,006 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 12:02:38,007 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 12:02:38,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2021-12-17 12:02:38,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fdee48df/d608094b425c47da9f79701a1d5452cf/FLAG633f8f349 [2021-12-17 12:02:38,421 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 12:02:38,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2021-12-17 12:02:38,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fdee48df/d608094b425c47da9f79701a1d5452cf/FLAG633f8f349 [2021-12-17 12:02:38,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fdee48df/d608094b425c47da9f79701a1d5452cf [2021-12-17 12:02:38,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 12:02:38,448 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 12:02:38,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 12:02:38,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 12:02:38,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 12:02:38,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3421ff24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38, skipping insertion in model container [2021-12-17 12:02:38,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 12:02:38,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 12:02:38,636 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/egcd2-ll_valuebound5.c[490,503] [2021-12-17 12:02:38,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 12:02:38,670 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 12:02:38,681 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/egcd2-ll_valuebound5.c[490,503] [2021-12-17 12:02:38,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 12:02:38,711 INFO L208 MainTranslator]: Completed translation [2021-12-17 12:02:38,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38 WrapperNode [2021-12-17 12:02:38,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 12:02:38,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 12:02:38,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 12:02:38,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 12:02:38,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,750 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2021-12-17 12:02:38,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 12:02:38,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 12:02:38,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 12:02:38,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 12:02:38,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 12:02:38,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 12:02:38,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 12:02:38,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 12:02:38,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38" (1/1) ... [2021-12-17 12:02:38,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 12:02:38,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:38,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 12:02:38,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 12:02:38,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 12:02:38,872 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 12:02:38,872 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 12:02:38,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 12:02:38,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 12:02:38,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 12:02:38,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 12:02:38,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 12:02:38,917 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 12:02:38,919 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 12:02:39,069 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 12:02:39,073 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 12:02:39,073 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 12:02:39,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:02:39 BoogieIcfgContainer [2021-12-17 12:02:39,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 12:02:39,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 12:02:39,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 12:02:39,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 12:02:39,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:02:38" (1/3) ... [2021-12-17 12:02:39,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d50cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:02:39, skipping insertion in model container [2021-12-17 12:02:39,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:02:38" (2/3) ... [2021-12-17 12:02:39,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d50cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:02:39, skipping insertion in model container [2021-12-17 12:02:39,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:02:39" (3/3) ... [2021-12-17 12:02:39,096 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2021-12-17 12:02:39,099 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 12:02:39,099 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 12:02:39,137 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 12:02:39,143 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 12:02:39,144 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 12:02:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 12:02:39,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 12:02:39,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:39,164 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:39,165 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:39,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:39,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2021-12-17 12:02:39,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:39,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244356918] [2021-12-17 12:02:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:39,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:39,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 12:02:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:39,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 12:02:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:39,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 12:02:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:39,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 12:02:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:39,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 12:02:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:39,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 12:02:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 12:02:39,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:02:39,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244356918] [2021-12-17 12:02:39,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244356918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:02:39,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:02:39,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 12:02:39,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873750776] [2021-12-17 12:02:39,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:02:39,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 12:02:39,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:02:39,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 12:02:39,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 12:02:39,366 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:02:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:02:39,385 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2021-12-17 12:02:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 12:02:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-12-17 12:02:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:02:39,391 INFO L225 Difference]: With dead ends: 67 [2021-12-17 12:02:39,391 INFO L226 Difference]: Without dead ends: 31 [2021-12-17 12:02:39,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 12:02:39,397 INFO L933 BasicCegarLoop]: 46 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, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:02:39,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:02:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-17 12:02:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-17 12:02:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 12:02:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-12-17 12:02:39,435 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2021-12-17 12:02:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:02:39,435 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-12-17 12:02:39,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:02:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-12-17 12:02:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 12:02:39,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:39,439 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:39,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 12:02:39,440 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:39,441 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2021-12-17 12:02:39,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:39,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035128264] [2021-12-17 12:02:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:39,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:39,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:02:39,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274393111] [2021-12-17 12:02:39,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:39,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:39,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:39,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:02:39,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 12:02:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:39,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 12:02:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:02:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 12:02:39,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:02:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 12:02:39,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:02:39,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035128264] [2021-12-17 12:02:39,955 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:02:39,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274393111] [2021-12-17 12:02:39,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274393111] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:02:39,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:02:39,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-17 12:02:39,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210255147] [2021-12-17 12:02:39,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:02:39,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 12:02:39,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:02:39,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 12:02:39,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 12:02:39,959 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:02:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:02:40,079 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-12-17 12:02:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 12:02:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2021-12-17 12:02:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:02:40,081 INFO L225 Difference]: With dead ends: 48 [2021-12-17 12:02:40,082 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 12:02:40,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-17 12:02:40,083 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:02:40,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 134 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:02:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 12:02:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-12-17 12:02:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 12:02:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-12-17 12:02:40,092 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2021-12-17 12:02:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:02:40,092 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-12-17 12:02:40,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:02:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-12-17 12:02:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 12:02:40,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:40,094 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:40,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 12:02:40,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:40,312 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:40,312 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2021-12-17 12:02:40,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:40,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492024357] [2021-12-17 12:02:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:40,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:40,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:02:40,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963536466] [2021-12-17 12:02:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:40,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:40,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:40,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:02:40,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 12:02:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:40,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 12:02:40,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:02:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 12:02:40,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:02:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 12:02:40,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:02:40,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492024357] [2021-12-17 12:02:40,619 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:02:40,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963536466] [2021-12-17 12:02:40,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963536466] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 12:02:40,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:02:40,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-17 12:02:40,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339373627] [2021-12-17 12:02:40,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:02:40,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:02:40,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:02:40,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:02:40,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 12:02:40,621 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 12:02:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:02:40,653 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-12-17 12:02:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:02:40,654 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2021-12-17 12:02:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:02:40,655 INFO L225 Difference]: With dead ends: 39 [2021-12-17 12:02:40,655 INFO L226 Difference]: Without dead ends: 37 [2021-12-17 12:02:40,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-17 12:02:40,657 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:02:40,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:02:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-17 12:02:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-17 12:02:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 12:02:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-12-17 12:02:40,663 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2021-12-17 12:02:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:02:40,663 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-12-17 12:02:40,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 12:02:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-12-17 12:02:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 12:02:40,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:40,665 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:40,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 12:02:40,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 12:02:40,889 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:40,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2021-12-17 12:02:40,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:40,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148823627] [2021-12-17 12:02:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:40,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:40,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:02:40,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228236344] [2021-12-17 12:02:40,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:40,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:40,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:40,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:02:40,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 12:02:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:40,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 12:02:40,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:02:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 12:02:41,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:02:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 12:02:41,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:02:41,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148823627] [2021-12-17 12:02:41,253 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:02:41,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228236344] [2021-12-17 12:02:41,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228236344] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 12:02:41,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:02:41,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-17 12:02:41,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146326242] [2021-12-17 12:02:41,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:02:41,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:02:41,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:02:41,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:02:41,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 12:02:41,256 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 12:02:41,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:02:41,286 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-12-17 12:02:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:02:41,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2021-12-17 12:02:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:02:41,288 INFO L225 Difference]: With dead ends: 50 [2021-12-17 12:02:41,288 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 12:02:41,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 12:02:41,289 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:02:41,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:02:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 12:02:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-17 12:02:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 12:02:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-12-17 12:02:41,297 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2021-12-17 12:02:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:02:41,297 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-12-17 12:02:41,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 12:02:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-12-17 12:02:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 12:02:41,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:41,298 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:41,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 12:02:41,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:41,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:41,518 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2021-12-17 12:02:41,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:41,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372506831] [2021-12-17 12:02:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:41,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:41,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:02:41,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841414412] [2021-12-17 12:02:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:41,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:41,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:41,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:02:41,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 12:02:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:41,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 12:02:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:02:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 12:02:41,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:02:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 12:02:41,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:02:41,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372506831] [2021-12-17 12:02:41,883 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:02:41,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841414412] [2021-12-17 12:02:41,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841414412] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 12:02:41,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:02:41,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-17 12:02:41,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129831542] [2021-12-17 12:02:41,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:02:41,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:02:41,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:02:41,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:02:41,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 12:02:41,885 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 12:02:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:02:41,923 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-12-17 12:02:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:02:41,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-12-17 12:02:41,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:02:41,925 INFO L225 Difference]: With dead ends: 54 [2021-12-17 12:02:41,925 INFO L226 Difference]: Without dead ends: 52 [2021-12-17 12:02:41,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 12:02:41,926 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:02:41,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 147 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:02:41,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-17 12:02:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-12-17 12:02:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 12:02:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-17 12:02:41,934 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2021-12-17 12:02:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:02:41,935 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-17 12:02:41,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 12:02:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-17 12:02:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 12:02:41,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:41,936 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:41,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 12:02:42,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:42,158 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2021-12-17 12:02:42,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:42,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778558496] [2021-12-17 12:02:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:42,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:42,179 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:02:42,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652458076] [2021-12-17 12:02:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:42,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:42,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:42,181 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:02:42,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 12:02:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:42,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 12:02:42,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:02:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-17 12:02:42,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:02:42,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:02:42,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778558496] [2021-12-17 12:02:42,624 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:02:42,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652458076] [2021-12-17 12:02:42,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652458076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 12:02:42,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:02:42,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-17 12:02:42,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196670300] [2021-12-17 12:02:42,625 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 12:02:42,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 12:02:42,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:02:42,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 12:02:42,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-17 12:02:42,626 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 12:02:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:02:42,781 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-12-17 12:02:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 12:02:42,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-12-17 12:02:42,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:02:42,783 INFO L225 Difference]: With dead ends: 58 [2021-12-17 12:02:42,783 INFO L226 Difference]: Without dead ends: 56 [2021-12-17 12:02:42,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-12-17 12:02:42,784 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:02:42,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 148 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:02:42,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-17 12:02:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-17 12:02:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 12:02:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-12-17 12:02:42,791 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2021-12-17 12:02:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:02:42,791 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-12-17 12:02:42,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 12:02:42,792 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-12-17 12:02:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 12:02:42,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:42,793 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:42,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 12:02:43,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:43,008 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2021-12-17 12:02:43,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:43,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144380413] [2021-12-17 12:02:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:43,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:43,019 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:02:43,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606940316] [2021-12-17 12:02:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:43,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:43,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:43,021 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:02:43,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 12:02:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:43,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 12:02:43,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:02:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-17 12:02:43,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:02:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-17 12:02:43,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:02:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144380413] [2021-12-17 12:02:43,336 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:02:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606940316] [2021-12-17 12:02:43,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606940316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:02:43,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:02:43,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-17 12:02:43,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712444644] [2021-12-17 12:02:43,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:02:43,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 12:02:43,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:02:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 12:02:43,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 12:02:43,339 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 12:02:43,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:02:43,487 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2021-12-17 12:02:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 12:02:43,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2021-12-17 12:02:43,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:02:43,489 INFO L225 Difference]: With dead ends: 102 [2021-12-17 12:02:43,489 INFO L226 Difference]: Without dead ends: 94 [2021-12-17 12:02:43,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-17 12:02:43,490 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 30 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:02:43,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 353 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:02:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-17 12:02:43,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2021-12-17 12:02:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-17 12:02:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2021-12-17 12:02:43,502 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2021-12-17 12:02:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:02:43,503 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2021-12-17 12:02:43,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 12:02:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2021-12-17 12:02:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 12:02:43,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:43,504 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:43,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 12:02:43,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:43,720 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:43,721 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2021-12-17 12:02:43,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:43,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135765332] [2021-12-17 12:02:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:43,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:43,731 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:02:43,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277061153] [2021-12-17 12:02:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:43,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:43,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:43,733 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:02:43,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 12:02:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:43,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 12:02:43,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:02:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-17 12:02:43,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:02:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-17 12:02:44,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:02:44,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135765332] [2021-12-17 12:02:44,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:02:44,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277061153] [2021-12-17 12:02:44,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277061153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:02:44,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:02:44,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-12-17 12:02:44,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671953241] [2021-12-17 12:02:44,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:02:44,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 12:02:44,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:02:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 12:02:44,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-17 12:02:44,185 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-17 12:02:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:02:44,456 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2021-12-17 12:02:44,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 12:02:44,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2021-12-17 12:02:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:02:44,459 INFO L225 Difference]: With dead ends: 128 [2021-12-17 12:02:44,460 INFO L226 Difference]: Without dead ends: 124 [2021-12-17 12:02:44,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-17 12:02:44,461 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 12:02:44,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 300 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 12:02:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-17 12:02:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2021-12-17 12:02:44,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-17 12:02:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2021-12-17 12:02:44,476 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2021-12-17 12:02:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:02:44,476 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2021-12-17 12:02:44,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-17 12:02:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2021-12-17 12:02:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-17 12:02:44,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:44,478 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:44,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 12:02:44,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:44,694 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:44,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:44,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2021-12-17 12:02:44,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:44,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377339300] [2021-12-17 12:02:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:44,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:44,704 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:02:44,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822187623] [2021-12-17 12:02:44,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 12:02:44,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:44,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:44,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:02:44,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 12:02:44,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 12:02:44,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:02:44,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 12:02:44,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:02:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-17 12:02:45,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:02:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-17 12:02:45,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:02:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377339300] [2021-12-17 12:02:45,643 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:02:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822187623] [2021-12-17 12:02:45,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822187623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:02:45,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:02:45,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2021-12-17 12:02:45,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034982874] [2021-12-17 12:02:45,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:02:45,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 12:02:45,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:02:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 12:02:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-17 12:02:45,644 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 8 states have call successors, (24) [2021-12-17 12:02:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:02:48,793 INFO L93 Difference]: Finished difference Result 234 states and 348 transitions. [2021-12-17 12:02:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 12:02:48,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 8 states have call successors, (24) Word has length 76 [2021-12-17 12:02:48,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:02:48,797 INFO L225 Difference]: With dead ends: 234 [2021-12-17 12:02:48,797 INFO L226 Difference]: Without dead ends: 232 [2021-12-17 12:02:48,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2021-12-17 12:02:48,798 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 101 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 12:02:48,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 366 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 12:02:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-17 12:02:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2021-12-17 12:02:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 109 states have (on average 1.2293577981651376) internal successors, (134), 112 states have internal predecessors, (134), 81 states have call successors, (81), 10 states have call predecessors, (81), 10 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-17 12:02:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2021-12-17 12:02:48,841 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 76 [2021-12-17 12:02:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:02:48,842 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2021-12-17 12:02:48,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 8 states have call successors, (24) [2021-12-17 12:02:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2021-12-17 12:02:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-17 12:02:48,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:48,846 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:48,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-17 12:02:49,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 12:02:49,061 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2021-12-17 12:02:49,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:49,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725942021] [2021-12-17 12:02:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:49,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:49,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:02:49,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078639855] [2021-12-17 12:02:49,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 12:02:49,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:49,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:49,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:02:49,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 12:02:49,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 12:02:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:02:49,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 12:02:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:02:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-17 12:02:51,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:02:51,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:02:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725942021] [2021-12-17 12:02:51,464 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:02:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078639855] [2021-12-17 12:02:51,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078639855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 12:02:51,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:02:51,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-17 12:02:51,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138133516] [2021-12-17 12:02:51,464 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 12:02:51,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 12:02:51,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:02:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 12:02:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-12-17 12:02:51,465 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-17 12:02:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:02:53,164 INFO L93 Difference]: Finished difference Result 213 states and 305 transitions. [2021-12-17 12:02:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 12:02:53,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2021-12-17 12:02:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:02:53,166 INFO L225 Difference]: With dead ends: 213 [2021-12-17 12:02:53,166 INFO L226 Difference]: Without dead ends: 211 [2021-12-17 12:02:53,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-12-17 12:02:53,167 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 12:02:53,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 186 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 12:02:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-17 12:02:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2021-12-17 12:02:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 115 states have (on average 1.2173913043478262) internal successors, (140), 118 states have internal predecessors, (140), 81 states have call successors, (81), 12 states have call predecessors, (81), 12 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-17 12:02:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 301 transitions. [2021-12-17 12:02:53,220 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 301 transitions. Word has length 81 [2021-12-17 12:02:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:02:53,220 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 301 transitions. [2021-12-17 12:02:53,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-17 12:02:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 301 transitions. [2021-12-17 12:02:53,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 12:02:53,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:53,222 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:53,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 12:02:53,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 12:02:53,444 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:53,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:53,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2021-12-17 12:02:53,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:53,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898349491] [2021-12-17 12:02:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:53,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:53,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:02:53,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200809516] [2021-12-17 12:02:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:53,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:53,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:53,462 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:02:53,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 12:02:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:53,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 12:02:53,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:02:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-17 12:02:54,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:02:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-17 12:02:54,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:02:54,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898349491] [2021-12-17 12:02:54,328 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:02:54,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200809516] [2021-12-17 12:02:54,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200809516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:02:54,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:02:54,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-12-17 12:02:54,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380669069] [2021-12-17 12:02:54,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:02:54,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 12:02:54,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:02:54,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 12:02:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-17 12:02:54,329 INFO L87 Difference]: Start difference. First operand 209 states and 301 transitions. Second operand has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-17 12:02:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:02:57,108 INFO L93 Difference]: Finished difference Result 324 states and 478 transitions. [2021-12-17 12:02:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 12:02:57,108 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 87 [2021-12-17 12:02:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:02:57,111 INFO L225 Difference]: With dead ends: 324 [2021-12-17 12:02:57,111 INFO L226 Difference]: Without dead ends: 316 [2021-12-17 12:02:57,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2021-12-17 12:02:57,112 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 51 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 12:02:57,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 482 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 12:02:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-17 12:02:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2021-12-17 12:02:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 169 states have (on average 1.2248520710059172) internal successors, (207), 170 states have internal predecessors, (207), 127 states have call successors, (127), 15 states have call predecessors, (127), 15 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2021-12-17 12:02:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 460 transitions. [2021-12-17 12:02:57,168 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 460 transitions. Word has length 87 [2021-12-17 12:02:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:02:57,169 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 460 transitions. [2021-12-17 12:02:57,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-17 12:02:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 460 transitions. [2021-12-17 12:02:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 12:02:57,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:02:57,170 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:02:57,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-17 12:02:57,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 12:02:57,392 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:02:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:02:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2021-12-17 12:02:57,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:02:57,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314389378] [2021-12-17 12:02:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:57,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:02:57,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:02:57,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892646023] [2021-12-17 12:02:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:02:57,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:02:57,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:02:57,402 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:02:57,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 12:02:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:02:57,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-17 12:02:57,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:02:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 102 proven. 37 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-17 12:02:58,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:03:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 88 proven. 24 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-12-17 12:03:07,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:03:07,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314389378] [2021-12-17 12:03:07,817 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:03:07,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892646023] [2021-12-17 12:03:07,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892646023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:03:07,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:03:07,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-12-17 12:03:07,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497598272] [2021-12-17 12:03:07,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:03:07,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 12:03:07,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:03:07,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 12:03:07,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=439, Unknown=1, NotChecked=0, Total=552 [2021-12-17 12:03:07,819 INFO L87 Difference]: Start difference. First operand 312 states and 460 transitions. Second operand has 24 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 13 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 14 states have call predecessors, (32), 12 states have call successors, (32) [2021-12-17 12:03:10,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:12,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:16,422 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:28,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:31,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:32,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:39,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:41,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:44,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:50,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:52,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:55,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:57,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:03:59,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:04:34,286 WARN L227 SmtUtils]: Spent 26.50s on a formula simplification. DAG size of input: 71 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 12:04:36,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:04:36,218 INFO L93 Difference]: Finished difference Result 395 states and 585 transitions. [2021-12-17 12:04:36,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 12:04:36,219 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 13 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 14 states have call predecessors, (32), 12 states have call successors, (32) Word has length 103 [2021-12-17 12:04:36,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:04:36,237 INFO L225 Difference]: With dead ends: 395 [2021-12-17 12:04:36,237 INFO L226 Difference]: Without dead ends: 393 [2021-12-17 12:04:36,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 175 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=423, Invalid=1381, Unknown=2, NotChecked=0, Total=1806 [2021-12-17 12:04:36,239 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 97 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 197 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.7s IncrementalHoareTripleChecker+Time [2021-12-17 12:04:36,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 362 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 795 Invalid, 11 Unknown, 0 Unchecked, 40.7s Time] [2021-12-17 12:04:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-17 12:04:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 374. [2021-12-17 12:04:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 201 states have (on average 1.2189054726368158) internal successors, (245), 205 states have internal predecessors, (245), 155 states have call successors, (155), 17 states have call predecessors, (155), 17 states have return successors, (154), 151 states have call predecessors, (154), 154 states have call successors, (154) [2021-12-17 12:04:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 554 transitions. [2021-12-17 12:04:36,286 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 554 transitions. Word has length 103 [2021-12-17 12:04:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:04:36,286 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 554 transitions. [2021-12-17 12:04:36,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 13 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 14 states have call predecessors, (32), 12 states have call successors, (32) [2021-12-17 12:04:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 554 transitions. [2021-12-17 12:04:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 12:04:36,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:04:36,288 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:04:36,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 12:04:36,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 12:04:36,502 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:04:36,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:04:36,503 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2021-12-17 12:04:36,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:04:36,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741243634] [2021-12-17 12:04:36,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:04:36,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:04:36,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:04:36,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069028857] [2021-12-17 12:04:36,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 12:04:36,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:04:36,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:04:36,532 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) [2021-12-17 12:04:36,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 12:04:36,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 12:04:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:04:36,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 12:04:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:04:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-17 12:04:36,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:04:36,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:04:36,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741243634] [2021-12-17 12:04:36,719 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:04:36,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069028857] [2021-12-17 12:04:36,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069028857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:04:36,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:04:36,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:04:36,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575604365] [2021-12-17 12:04:36,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:04:36,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:04:36,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:04:36,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:04:36,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:04:36,720 INFO L87 Difference]: Start difference. First operand 374 states and 554 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-17 12:04:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:04:36,805 INFO L93 Difference]: Finished difference Result 472 states and 693 transitions. [2021-12-17 12:04:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 12:04:36,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2021-12-17 12:04:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:04:36,807 INFO L225 Difference]: With dead ends: 472 [2021-12-17 12:04:36,807 INFO L226 Difference]: Without dead ends: 272 [2021-12-17 12:04:36,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 12:04:36,808 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:04:36,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 167 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:04:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-17 12:04:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 252. [2021-12-17 12:04:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 138 states have internal predecessors, (155), 99 states have call successors, (99), 17 states have call predecessors, (99), 17 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2021-12-17 12:04:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 352 transitions. [2021-12-17 12:04:36,839 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 352 transitions. Word has length 106 [2021-12-17 12:04:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:04:36,840 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 352 transitions. [2021-12-17 12:04:36,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-17 12:04:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 352 transitions. [2021-12-17 12:04:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-17 12:04:36,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:04:36,841 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:04:36,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 12:04:37,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 12:04:37,061 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:04:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:04:37,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2021-12-17 12:04:37,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:04:37,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372149534] [2021-12-17 12:04:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:04:37,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:04:37,068 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:04:37,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136531823] [2021-12-17 12:04:37,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 12:04:37,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:04:37,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:04:37,069 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) [2021-12-17 12:04:37,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 12:04:37,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 12:04:37,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:04:37,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-17 12:04:37,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:04:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 143 proven. 64 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-12-17 12:04:39,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:04:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2021-12-17 12:04:41,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:04:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372149534] [2021-12-17 12:04:41,681 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:04:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136531823] [2021-12-17 12:04:41,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136531823] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:04:41,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:04:41,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 29 [2021-12-17 12:04:41,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920022487] [2021-12-17 12:04:41,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:04:41,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 12:04:41,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:04:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 12:04:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-12-17 12:04:41,683 INFO L87 Difference]: Start difference. First operand 252 states and 352 transitions. Second operand has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-17 12:04:59,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:04:59,299 INFO L93 Difference]: Finished difference Result 308 states and 426 transitions. [2021-12-17 12:04:59,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 12:04:59,311 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) Word has length 134 [2021-12-17 12:04:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:04:59,312 INFO L225 Difference]: With dead ends: 308 [2021-12-17 12:04:59,312 INFO L226 Difference]: Without dead ends: 300 [2021-12-17 12:04:59,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 235 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 12:04:59,313 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 99 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-12-17 12:04:59,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 481 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-12-17 12:04:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-17 12:04:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 249. [2021-12-17 12:04:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 137 states have (on average 1.094890510948905) internal successors, (150), 139 states have internal predecessors, (150), 90 states have call successors, (90), 21 states have call predecessors, (90), 21 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-12-17 12:04:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 330 transitions. [2021-12-17 12:04:59,348 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 330 transitions. Word has length 134 [2021-12-17 12:04:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:04:59,349 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 330 transitions. [2021-12-17 12:04:59,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-17 12:04:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 330 transitions. [2021-12-17 12:04:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 12:04:59,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:04:59,350 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:04:59,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 12:04:59,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 12:04:59,567 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:04:59,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:04:59,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1419250666, now seen corresponding path program 2 times [2021-12-17 12:04:59,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:04:59,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180743372] [2021-12-17 12:04:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:04:59,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:04:59,575 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:04:59,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469062642] [2021-12-17 12:04:59,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 12:04:59,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:04:59,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:04:59,578 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:04:59,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 12:04:59,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 12:04:59,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:04:59,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-17 12:04:59,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2021-12-17 12:05:00,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2021-12-17 12:05:03,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:03,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180743372] [2021-12-17 12:05:03,313 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:03,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469062642] [2021-12-17 12:05:03,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469062642] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:05:03,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:05:03,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-12-17 12:05:03,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067166365] [2021-12-17 12:05:03,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:05:03,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 12:05:03,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 12:05:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-12-17 12:05:03,314 INFO L87 Difference]: Start difference. First operand 249 states and 330 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 15 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 14 states have call predecessors, (48), 15 states have call successors, (48) [2021-12-17 12:05:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:26,235 INFO L93 Difference]: Finished difference Result 416 states and 592 transitions. [2021-12-17 12:05:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-17 12:05:26,235 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 15 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 14 states have call predecessors, (48), 15 states have call successors, (48) Word has length 145 [2021-12-17 12:05:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:26,237 INFO L225 Difference]: With dead ends: 416 [2021-12-17 12:05:26,237 INFO L226 Difference]: Without dead ends: 414 [2021-12-17 12:05:26,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 261 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=1198, Invalid=4808, Unknown=0, NotChecked=0, Total=6006 [2021-12-17 12:05:26,239 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 137 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:26,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1106 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2021-12-17 12:05:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-12-17 12:05:26,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 368. [2021-12-17 12:05:26,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 193 states have (on average 1.1139896373056994) internal successors, (215), 196 states have internal predecessors, (215), 150 states have call successors, (150), 24 states have call predecessors, (150), 24 states have return successors, (150), 147 states have call predecessors, (150), 150 states have call successors, (150) [2021-12-17 12:05:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 515 transitions. [2021-12-17 12:05:26,316 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 515 transitions. Word has length 145 [2021-12-17 12:05:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:26,316 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 515 transitions. [2021-12-17 12:05:26,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 15 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 14 states have call predecessors, (48), 15 states have call successors, (48) [2021-12-17 12:05:26,317 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 515 transitions. [2021-12-17 12:05:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-17 12:05:26,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:26,318 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:26,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-17 12:05:26,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:26,531 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 3 times [2021-12-17 12:05:26,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:26,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062985483] [2021-12-17 12:05:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:26,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:26,538 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:26,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284661337] [2021-12-17 12:05:26,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 12:05:26,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:26,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:26,539 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:26,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 12:05:26,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 12:05:26,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:05:26,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-17 12:05:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 144 proven. 53 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-12-17 12:05:27,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:28,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:28,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062985483] [2021-12-17 12:05:28,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:28,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284661337] [2021-12-17 12:05:28,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284661337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 12:05:28,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:05:28,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-17 12:05:28,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128825310] [2021-12-17 12:05:28,963 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 12:05:28,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 12:05:28,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 12:05:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-12-17 12:05:28,963 INFO L87 Difference]: Start difference. First operand 368 states and 515 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-12-17 12:05:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:29,941 INFO L93 Difference]: Finished difference Result 393 states and 541 transitions. [2021-12-17 12:05:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 12:05:29,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 150 [2021-12-17 12:05:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:29,957 INFO L225 Difference]: With dead ends: 393 [2021-12-17 12:05:29,957 INFO L226 Difference]: Without dead ends: 391 [2021-12-17 12:05:29,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-12-17 12:05:29,958 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 36 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:29,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 324 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 12:05:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-12-17 12:05:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 378. [2021-12-17 12:05:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 201 states have (on average 1.109452736318408) internal successors, (223), 205 states have internal predecessors, (223), 149 states have call successors, (149), 27 states have call predecessors, (149), 27 states have return successors, (149), 145 states have call predecessors, (149), 149 states have call successors, (149) [2021-12-17 12:05:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 521 transitions. [2021-12-17 12:05:30,032 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 521 transitions. Word has length 150 [2021-12-17 12:05:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:30,032 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 521 transitions. [2021-12-17 12:05:30,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-12-17 12:05:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 521 transitions. [2021-12-17 12:05:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-17 12:05:30,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:30,034 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:30,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:30,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 12:05:30,268 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1271158034, now seen corresponding path program 4 times [2021-12-17 12:05:30,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:30,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935827720] [2021-12-17 12:05:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:30,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:30,282 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:30,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267870385] [2021-12-17 12:05:30,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 12:05:30,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:30,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:30,284 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:30,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 12:05:30,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 12:05:30,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:05:30,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-17 12:05:30,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 125 proven. 200 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2021-12-17 12:05:31,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 181 proven. 62 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2021-12-17 12:05:32,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:32,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935827720] [2021-12-17 12:05:32,995 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:32,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267870385] [2021-12-17 12:05:32,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267870385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:05:32,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:05:32,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 29 [2021-12-17 12:05:32,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918154923] [2021-12-17 12:05:32,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:05:32,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 12:05:32,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 12:05:32,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-12-17 12:05:32,997 INFO L87 Difference]: Start difference. First operand 378 states and 521 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (49), 14 states have call predecessors, (49), 14 states have call successors, (49) [2021-12-17 12:05:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:45,138 INFO L93 Difference]: Finished difference Result 458 states and 639 transitions. [2021-12-17 12:05:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 12:05:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (49), 14 states have call predecessors, (49), 14 states have call successors, (49) Word has length 170 [2021-12-17 12:05:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:45,141 INFO L225 Difference]: With dead ends: 458 [2021-12-17 12:05:45,141 INFO L226 Difference]: Without dead ends: 456 [2021-12-17 12:05:45,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 305 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 12:05:45,142 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 127 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:45,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 576 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-17 12:05:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-17 12:05:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 426. [2021-12-17 12:05:45,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 226 states have (on average 1.1150442477876106) internal successors, (252), 230 states have internal predecessors, (252), 168 states have call successors, (168), 31 states have call predecessors, (168), 31 states have return successors, (168), 164 states have call predecessors, (168), 168 states have call successors, (168) [2021-12-17 12:05:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 588 transitions. [2021-12-17 12:05:45,237 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 588 transitions. Word has length 170 [2021-12-17 12:05:45,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:45,238 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 588 transitions. [2021-12-17 12:05:45,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (49), 2 states have call predecessors, (49), 3 states have return successors, (49), 14 states have call predecessors, (49), 14 states have call successors, (49) [2021-12-17 12:05:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 588 transitions. [2021-12-17 12:05:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-17 12:05:45,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:45,240 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:45,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:45,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 12:05:45,455 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 5 times [2021-12-17 12:05:45,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:45,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865504157] [2021-12-17 12:05:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:45,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:45,466 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:45,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803643788] [2021-12-17 12:05:45,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 12:05:45,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:45,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:45,480 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:05:45,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 12:05:45,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-17 12:05:45,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:05:45,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-17 12:05:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 190 proven. 151 refuted. 0 times theorem prover too weak. 877 trivial. 0 not checked. [2021-12-17 12:05:47,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:06:16,340 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse12 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (or (not (= (+ .cse0 .cse1 .cse2 .cse3) (+ .cse4 .cse5 .cse6 .cse7))) (<= (+ (* 2 .cse8) (* 2 .cse9)) (+ .cse10 .cse11 (* 2 .cse12) (* 2 .cse13))) (< (+ .cse12 .cse13 |c_ULTIMATE.start_main_~c~0#1|) (+ .cse8 .cse9)) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) (not (= (+ .cse10 .cse11) |c_ULTIMATE.start_main_~b~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) .cse4 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) .cse5 .cse6 .cse7) (+ (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|) .cse0 .cse1 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|) .cse2 .cse3)))) is different from true [2021-12-17 12:07:34,726 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse12 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse14 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse15 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse16 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse17 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (or (<= (+ (* 2 .cse0) (* 2 .cse1)) (+ (* 3 .cse2) (* 3 .cse3) (* 2 .cse4) (* 2 .cse5))) (<= (+ .cse2 .cse3 .cse4 .cse5 |c_ULTIMATE.start_main_~b~0#1|) (+ .cse0 .cse1)) (not (= (+ .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (+ .cse12 .cse13 .cse14 .cse15 .cse16 .cse17))) (not (= (+ .cse2 .cse3) |c_ULTIMATE.start_main_~b~0#1|)) (= (+ (* 2 .cse12) .cse13 (* 2 .cse14) .cse15 .cse16 .cse17) (+ (* 2 .cse6) .cse7 .cse8 (* 2 .cse9) .cse10 .cse11)) (< (+ .cse2 .cse3 .cse4 .cse5 |c_ULTIMATE.start_main_~c~0#1|) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1| .cse1)))) is different from true [2021-12-17 12:08:52,870 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse14 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse15 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse16 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse17 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (or (= (+ .cse0 (* 2 .cse1) (* 2 .cse2) .cse3 (* 2 .cse4) (* 2 .cse5)) (+ .cse6 (* 2 .cse7) .cse8 (* 2 .cse9) (* 2 .cse10) (* 2 .cse11))) (not (= (+ .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (+ .cse0 .cse1 .cse2 .cse3 .cse4 .cse5))) (<= (+ (* 2 .cse12) (* 2 .cse13)) (+ .cse14 .cse15 (* 2 .cse16) (* 2 .cse17))) (< |c_ULTIMATE.start_main_~b~0#1| (+ .cse14 .cse15)) (< (+ .cse16 .cse17 |c_ULTIMATE.start_main_~c~0#1|) (+ .cse12 .cse13)) (<= (+ (* 2 .cse14) (* 2 .cse15) (* 3 .cse16) (* 3 .cse17)) (+ (* 3 .cse12) (* 3 .cse13))))) is different from true [2021-12-17 12:10:49,107 WARN L227 SmtUtils]: Spent 45.99s on a formula simplification that was a NOOP. DAG size: 24 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 12:11:15,168 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse9 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse8 (+ .cse11 .cse12)) (.cse4 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|))) (or (= (+ .cse0 (* 2 .cse1) .cse2 (* 2 .cse3)) (+ .cse4 .cse5 (* 2 .cse6) (* 2 .cse7))) (< |c_ULTIMATE.start_main_~b~0#1| .cse8) (< |c_ULTIMATE.start_main_~a~0#1| (+ .cse9 .cse10)) (<= (+ (* 2 .cse11) (* 2 .cse12)) (+ (* 3 .cse9) (* 3 .cse10))) (<= (+ (* 2 .cse9) (* 2 .cse10)) .cse8) (not (= (+ .cse4 .cse5 .cse6 .cse7) (+ .cse0 .cse1 .cse2 .cse3)))))) is different from true [2021-12-17 12:11:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 189 proven. 58 refuted. 2 times theorem prover too weak. 892 trivial. 77 not checked. [2021-12-17 12:11:47,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:11:47,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865504157] [2021-12-17 12:11:47,404 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:11:47,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803643788] [2021-12-17 12:11:47,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803643788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:11:47,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:11:47,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 37 [2021-12-17 12:11:47,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114618494] [2021-12-17 12:11:47,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:11:47,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-17 12:11:47,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:11:47,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-17 12:11:47,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=886, Unknown=9, NotChecked=260, Total=1332 [2021-12-17 12:11:47,413 INFO L87 Difference]: Start difference. First operand 426 states and 588 transitions. Second operand has 37 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 30 states have internal predecessors, (66), 19 states have call successors, (58), 2 states have call predecessors, (58), 3 states have return successors, (57), 21 states have call predecessors, (57), 18 states have call successors, (57) [2021-12-17 12:11:49,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:11:52,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:11:54,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:12:00,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:12:02,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:12:06,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:12:53,570 WARN L227 SmtUtils]: Spent 22.46s on a formula simplification. DAG size of input: 82 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 12:12:58,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:13:01,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:13:08,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:13:19,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:13:22,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:13:25,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:13:27,076 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:13:54,331 WARN L227 SmtUtils]: Spent 22.09s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 12:14:32,597 WARN L227 SmtUtils]: Spent 33.53s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 12:14:34,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:14:38,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:14:40,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:14:42,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:14:44,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:14:46,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:14:48,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:14:50,744 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:14:53,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:14:55,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:14:57,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:15:00,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:15:02,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:15:17,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:15:47,672 WARN L227 SmtUtils]: Spent 28.54s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 12:15:49,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:15:57,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:16:06,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:16:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:16:06,244 INFO L93 Difference]: Finished difference Result 493 states and 676 transitions. [2021-12-17 12:16:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 12:16:06,245 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 30 states have internal predecessors, (66), 19 states have call successors, (58), 2 states have call predecessors, (58), 3 states have return successors, (57), 21 states have call predecessors, (57), 18 states have call successors, (57) Word has length 175 [2021-12-17 12:16:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:16:06,247 INFO L225 Difference]: With dead ends: 493 [2021-12-17 12:16:06,247 INFO L226 Difference]: Without dead ends: 491 [2021-12-17 12:16:06,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 309 SyntacticMatches, 9 SemanticMatches, 75 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 208.2s TimeCoverageRelationStatistics Valid=1021, Invalid=4225, Unknown=26, NotChecked=580, Total=5852 [2021-12-17 12:16:06,249 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 184 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 493 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 2785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 605 IncrementalHoareTripleChecker+Unchecked, 78.2s IncrementalHoareTripleChecker+Time [2021-12-17 12:16:06,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 777 Invalid, 2785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 1660 Invalid, 27 Unknown, 605 Unchecked, 78.2s Time] [2021-12-17 12:16:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-17 12:16:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 481. [2021-12-17 12:16:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 256 states have (on average 1.11328125) internal successors, (285), 261 states have internal predecessors, (285), 188 states have call successors, (188), 36 states have call predecessors, (188), 36 states have return successors, (188), 183 states have call predecessors, (188), 188 states have call successors, (188) [2021-12-17 12:16:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 661 transitions. [2021-12-17 12:16:06,378 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 661 transitions. Word has length 175 [2021-12-17 12:16:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:16:06,379 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 661 transitions. [2021-12-17 12:16:06,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 30 states have internal predecessors, (66), 19 states have call successors, (58), 2 states have call predecessors, (58), 3 states have return successors, (57), 21 states have call predecessors, (57), 18 states have call successors, (57) [2021-12-17 12:16:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 661 transitions. [2021-12-17 12:16:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-17 12:16:06,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:16:06,381 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:16:06,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 12:16:06,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 12:16:06,600 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:16:06,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:16:06,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1933500790, now seen corresponding path program 6 times [2021-12-17 12:16:06,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:16:06,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213991374] [2021-12-17 12:16:06,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:16:06,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:16:06,606 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:16:06,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326814377] [2021-12-17 12:16:06,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 12:16:06,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:16:06,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:16:06,617 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:16:06,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 12:16:06,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 12:16:06,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:16:06,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-17 12:16:06,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:16:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 126 proven. 119 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2021-12-17 12:16:08,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:16:11,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:16:11,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213991374] [2021-12-17 12:16:11,647 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:16:11,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326814377] [2021-12-17 12:16:11,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326814377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 12:16:11,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:16:11,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-12-17 12:16:11,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33408799] [2021-12-17 12:16:11,647 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 12:16:11,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 12:16:11,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:16:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 12:16:11,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-12-17 12:16:11,648 INFO L87 Difference]: Start difference. First operand 481 states and 661 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 8 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-17 12:16:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:16:13,379 INFO L93 Difference]: Finished difference Result 591 states and 811 transitions. [2021-12-17 12:16:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 12:16:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 8 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 189 [2021-12-17 12:16:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:16:13,383 INFO L225 Difference]: With dead ends: 591 [2021-12-17 12:16:13,383 INFO L226 Difference]: Without dead ends: 589 [2021-12-17 12:16:13,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 247 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 12:16:13,384 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 44 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 12:16:13,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 571 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 12:16:13,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-12-17 12:16:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 585. [2021-12-17 12:16:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 310 states have (on average 1.1193548387096774) internal successors, (347), 314 states have internal predecessors, (347), 229 states have call successors, (229), 45 states have call predecessors, (229), 45 states have return successors, (229), 225 states have call predecessors, (229), 229 states have call successors, (229) [2021-12-17 12:16:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 805 transitions. [2021-12-17 12:16:13,625 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 805 transitions. Word has length 189 [2021-12-17 12:16:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:16:13,626 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 805 transitions. [2021-12-17 12:16:13,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 8 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-17 12:16:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 805 transitions. [2021-12-17 12:16:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-17 12:16:13,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:16:13,635 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:16:13,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 12:16:13,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:16:13,851 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:16:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:16:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1249596117, now seen corresponding path program 7 times [2021-12-17 12:16:13,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:16:13,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339692338] [2021-12-17 12:16:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:16:13,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:16:13,858 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:16:13,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317782193] [2021-12-17 12:16:13,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 12:16:13,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:16:13,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:16:13,862 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:16:13,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 12:16:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:16:13,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 12:16:13,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:16:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 366 proven. 112 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2021-12-17 12:16:14,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:16:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 93 proven. 103 refuted. 0 times theorem prover too weak. 1449 trivial. 0 not checked. [2021-12-17 12:16:14,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:16:14,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339692338] [2021-12-17 12:16:14,977 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:16:14,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317782193] [2021-12-17 12:16:14,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317782193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:16:14,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:16:14,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-12-17 12:16:14,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376374402] [2021-12-17 12:16:14,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:16:14,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 12:16:14,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:16:14,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 12:16:14,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-12-17 12:16:14,978 INFO L87 Difference]: Start difference. First operand 585 states and 805 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 18 states have call successors, (66), 2 states have call predecessors, (66), 3 states have return successors, (66), 17 states have call predecessors, (66), 18 states have call successors, (66) [2021-12-17 12:16:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:16:16,567 INFO L93 Difference]: Finished difference Result 737 states and 998 transitions. [2021-12-17 12:16:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 12:16:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 18 states have call successors, (66), 2 states have call predecessors, (66), 3 states have return successors, (66), 17 states have call predecessors, (66), 18 states have call successors, (66) Word has length 194 [2021-12-17 12:16:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:16:16,569 INFO L225 Difference]: With dead ends: 737 [2021-12-17 12:16:16,569 INFO L226 Difference]: Without dead ends: 397 [2021-12-17 12:16:16,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=601, Invalid=2369, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 12:16:16,571 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 69 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 12:16:16,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1257 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 782 Invalid, 0 Unknown, 57 Unchecked, 0.8s Time] [2021-12-17 12:16:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-17 12:16:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2021-12-17 12:16:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 219 states have (on average 1.091324200913242) internal successors, (239), 222 states have internal predecessors, (239), 141 states have call successors, (141), 36 states have call predecessors, (141), 36 states have return successors, (141), 138 states have call predecessors, (141), 141 states have call successors, (141) [2021-12-17 12:16:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 521 transitions. [2021-12-17 12:16:16,672 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 521 transitions. Word has length 194 [2021-12-17 12:16:16,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:16:16,672 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 521 transitions. [2021-12-17 12:16:16,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 18 states have call successors, (66), 2 states have call predecessors, (66), 3 states have return successors, (66), 17 states have call predecessors, (66), 18 states have call successors, (66) [2021-12-17 12:16:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 521 transitions. [2021-12-17 12:16:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-17 12:16:16,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:16:16,674 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:16:16,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-17 12:16:16,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:16:16,886 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:16:16,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:16:16,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1921141682, now seen corresponding path program 8 times [2021-12-17 12:16:16,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:16:16,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438603542] [2021-12-17 12:16:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:16:16,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:16:16,898 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:16:16,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816663748] [2021-12-17 12:16:16,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 12:16:16,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:16:16,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:16:16,905 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:16:16,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 12:16:16,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 12:16:16,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:16:16,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 12:16:16,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:16:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 351 proven. 113 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2021-12-17 12:16:17,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:16:23,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:16:23,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438603542] [2021-12-17 12:16:23,910 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:16:23,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816663748] [2021-12-17 12:16:23,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816663748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 12:16:23,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:16:23,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-17 12:16:23,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582113679] [2021-12-17 12:16:23,911 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 12:16:23,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 12:16:23,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:16:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 12:16:23,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=403, Unknown=2, NotChecked=0, Total=506 [2021-12-17 12:16:23,912 INFO L87 Difference]: Start difference. First operand 397 states and 521 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-17 12:16:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:16:25,017 INFO L93 Difference]: Finished difference Result 589 states and 806 transitions. [2021-12-17 12:16:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 12:16:25,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) Word has length 214 [2021-12-17 12:16:25,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:16:25,019 INFO L225 Difference]: With dead ends: 589 [2021-12-17 12:16:25,019 INFO L226 Difference]: Without dead ends: 498 [2021-12-17 12:16:25,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 279 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=383, Invalid=1255, Unknown=2, NotChecked=0, Total=1640 [2021-12-17 12:16:25,020 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 32 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 12:16:25,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 735 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 12:16:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-12-17 12:16:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 481. [2021-12-17 12:16:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 252 states have (on average 1.1031746031746033) internal successors, (278), 257 states have internal predecessors, (278), 192 states have call successors, (192), 36 states have call predecessors, (192), 36 states have return successors, (192), 187 states have call predecessors, (192), 192 states have call successors, (192) [2021-12-17 12:16:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 662 transitions. [2021-12-17 12:16:25,152 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 662 transitions. Word has length 214 [2021-12-17 12:16:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:16:25,153 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 662 transitions. [2021-12-17 12:16:25,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2021-12-17 12:16:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 662 transitions. [2021-12-17 12:16:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-17 12:16:25,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:16:25,155 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:16:25,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 12:16:25,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-17 12:16:25,371 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:16:25,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:16:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash 188623920, now seen corresponding path program 9 times [2021-12-17 12:16:25,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:16:25,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120068060] [2021-12-17 12:16:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:16:25,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:16:25,378 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:16:25,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124808918] [2021-12-17 12:16:25,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 12:16:25,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:16:25,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:16:25,379 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:16:25,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 12:16:25,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 12:16:25,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:16:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-17 12:16:25,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:16:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 214 proven. 201 refuted. 0 times theorem prover too weak. 1614 trivial. 0 not checked. [2021-12-17 12:16:28,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:16:41,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:16:41,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120068060] [2021-12-17 12:16:41,647 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:16:41,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124808918] [2021-12-17 12:16:41,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124808918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 12:16:41,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:16:41,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-17 12:16:41,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232044214] [2021-12-17 12:16:41,648 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 12:16:41,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 12:16:41,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:16:41,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 12:16:41,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=961, Unknown=5, NotChecked=0, Total=1122 [2021-12-17 12:16:41,649 INFO L87 Difference]: Start difference. First operand 481 states and 662 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-12-17 12:16:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:16:43,215 INFO L93 Difference]: Finished difference Result 531 states and 730 transitions. [2021-12-17 12:16:43,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 12:16:43,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) Word has length 214 [2021-12-17 12:16:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:16:43,217 INFO L225 Difference]: With dead ends: 531 [2021-12-17 12:16:43,217 INFO L226 Difference]: Without dead ends: 529 [2021-12-17 12:16:43,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 267 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=242, Invalid=1475, Unknown=5, NotChecked=0, Total=1722 [2021-12-17 12:16:43,219 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 12:16:43,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 838 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1081 Invalid, 0 Unknown, 104 Unchecked, 0.9s Time] [2021-12-17 12:16:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-12-17 12:16:43,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 500. [2021-12-17 12:16:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 265 states have (on average 1.0981132075471698) internal successors, (291), 271 states have internal predecessors, (291), 195 states have call successors, (195), 39 states have call predecessors, (195), 39 states have return successors, (195), 189 states have call predecessors, (195), 195 states have call successors, (195) [2021-12-17 12:16:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 681 transitions. [2021-12-17 12:16:43,365 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 681 transitions. Word has length 214 [2021-12-17 12:16:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:16:43,365 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 681 transitions. [2021-12-17 12:16:43,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-12-17 12:16:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 681 transitions. [2021-12-17 12:16:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-17 12:16:43,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:16:43,367 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:16:43,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 12:16:43,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 12:16:43,584 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:16:43,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:16:43,584 INFO L85 PathProgramCache]: Analyzing trace with hash -924252495, now seen corresponding path program 10 times [2021-12-17 12:16:43,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:16:43,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431105811] [2021-12-17 12:16:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:16:43,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:16:43,592 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:16:43,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424007265] [2021-12-17 12:16:43,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 12:16:43,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:16:43,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:16:43,594 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:16:43,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 12:16:43,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 12:16:43,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:16:43,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 12:16:43,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:16:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 444 proven. 127 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2021-12-17 12:16:44,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:16:44,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:16:44,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431105811] [2021-12-17 12:16:44,759 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:16:44,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424007265] [2021-12-17 12:16:44,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424007265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 12:16:44,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:16:44,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-17 12:16:44,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991522067] [2021-12-17 12:16:44,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 12:16:44,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 12:16:44,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:16:44,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 12:16:44,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-17 12:16:44,760 INFO L87 Difference]: Start difference. First operand 500 states and 681 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2021-12-17 12:16:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:16:45,769 INFO L93 Difference]: Finished difference Result 827 states and 1176 transitions. [2021-12-17 12:16:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 12:16:45,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 219 [2021-12-17 12:16:45,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:16:45,772 INFO L225 Difference]: With dead ends: 827 [2021-12-17 12:16:45,772 INFO L226 Difference]: Without dead ends: 594 [2021-12-17 12:16:45,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 12:16:45,773 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 36 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 12:16:45,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 727 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 12:16:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-12-17 12:16:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 545. [2021-12-17 12:16:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 274 states have (on average 1.083941605839416) internal successors, (297), 277 states have internal predecessors, (297), 233 states have call successors, (233), 37 states have call predecessors, (233), 37 states have return successors, (233), 230 states have call predecessors, (233), 233 states have call successors, (233) [2021-12-17 12:16:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 763 transitions. [2021-12-17 12:16:45,934 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 763 transitions. Word has length 219 [2021-12-17 12:16:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:16:45,935 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 763 transitions. [2021-12-17 12:16:45,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2021-12-17 12:16:45,935 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 763 transitions. [2021-12-17 12:16:45,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-17 12:16:45,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:16:45,937 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:16:45,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 12:16:46,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:16:46,168 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:16:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:16:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1816606032, now seen corresponding path program 11 times [2021-12-17 12:16:46,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:16:46,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270670688] [2021-12-17 12:16:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:16:46,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:16:46,175 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:16:46,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731063464] [2021-12-17 12:16:46,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 12:16:46,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:16:46,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:16:46,176 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:16:46,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 12:16:52,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-17 12:16:52,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:16:52,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 12:16:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:16:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 413 proven. 229 refuted. 0 times theorem prover too weak. 2573 trivial. 0 not checked. [2021-12-17 12:16:52,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:16:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 147 proven. 211 refuted. 0 times theorem prover too weak. 2857 trivial. 0 not checked. [2021-12-17 12:16:53,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:16:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270670688] [2021-12-17 12:16:53,354 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:16:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731063464] [2021-12-17 12:16:53,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731063464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:16:53,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:16:53,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-12-17 12:16:53,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512198141] [2021-12-17 12:16:53,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:16:53,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 12:16:53,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:16:53,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 12:16:53,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-12-17 12:16:53,355 INFO L87 Difference]: Start difference. First operand 545 states and 763 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 27 states have internal predecessors, (77), 22 states have call successors, (87), 2 states have call predecessors, (87), 3 states have return successors, (87), 22 states have call predecessors, (87), 22 states have call successors, (87) [2021-12-17 12:16:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:16:55,785 INFO L93 Difference]: Finished difference Result 862 states and 1249 transitions. [2021-12-17 12:16:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 12:16:55,786 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 27 states have internal predecessors, (77), 22 states have call successors, (87), 2 states have call predecessors, (87), 3 states have return successors, (87), 22 states have call predecessors, (87), 22 states have call successors, (87) Word has length 258 [2021-12-17 12:16:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:16:55,788 INFO L225 Difference]: With dead ends: 862 [2021-12-17 12:16:55,788 INFO L226 Difference]: Without dead ends: 501 [2021-12-17 12:16:55,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 486 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=632, Invalid=2560, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 12:16:55,790 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 48 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 12:16:55,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1258 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 12:16:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-12-17 12:16:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 496. [2021-12-17 12:16:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 249 states have (on average 1.0682730923694779) internal successors, (266), 255 states have internal predecessors, (266), 212 states have call successors, (212), 34 states have call predecessors, (212), 34 states have return successors, (211), 206 states have call predecessors, (211), 211 states have call successors, (211) [2021-12-17 12:16:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 689 transitions. [2021-12-17 12:16:55,939 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 689 transitions. Word has length 258 [2021-12-17 12:16:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:16:55,940 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 689 transitions. [2021-12-17 12:16:55,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 27 states have internal predecessors, (77), 22 states have call successors, (87), 2 states have call predecessors, (87), 3 states have return successors, (87), 22 states have call predecessors, (87), 22 states have call successors, (87) [2021-12-17 12:16:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 689 transitions. [2021-12-17 12:16:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-17 12:16:55,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:16:55,942 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 10, 10, 10, 10, 10, 10, 9, 9, 9, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:16:55,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 12:16:56,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:16:56,147 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:16:56,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:16:56,147 INFO L85 PathProgramCache]: Analyzing trace with hash 551775116, now seen corresponding path program 12 times [2021-12-17 12:16:56,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:16:56,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526930289] [2021-12-17 12:16:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:16:56,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:16:56,157 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:16:56,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184748412] [2021-12-17 12:16:56,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 12:16:56,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:16:56,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:16:56,158 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:16:56,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 12:16:56,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 12:16:56,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:16:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-17 12:16:56,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:17:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 382 proven. 231 refuted. 0 times theorem prover too weak. 2602 trivial. 0 not checked. [2021-12-17 12:17:00,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:17:14,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:17:14,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526930289] [2021-12-17 12:17:14,025 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:17:14,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184748412] [2021-12-17 12:17:14,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184748412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 12:17:14,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:17:14,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-12-17 12:17:14,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422129157] [2021-12-17 12:17:14,026 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 12:17:14,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 12:17:14,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:17:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 12:17:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1059, Unknown=1, NotChecked=0, Total=1260 [2021-12-17 12:17:14,026 INFO L87 Difference]: Start difference. First operand 496 states and 689 transitions. Second operand has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 11 states have call predecessors, (28), 10 states have call successors, (28) Killed by 15